[ Top ] [ Modules ]
NAME
COGO - A package that publishes some common COGO functions used by other object types.
DESCRIPTION
A package that publishes some common COGO functions used by other object types.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
ArcTan2 -- Returns the angle in Radians with tangent opp/hyp. The returned value is between PI and -PI
SYNOPSIS
Function ArcTan2( dOpp in number,
dAdj in number)
Return Number deterministic
DESCRIPTION
Returns the angle in Radians with tangent opp/hyp. The returned value is between PI and -PI.
INPUTS
dOpp : NUMBER : Length of the vector perpendicular to two vectors (cross product)
dAdj : NUMBER : Length of the calculated from the dot product of two vectors
RESULT
number : The angle in Radians with tangent opp/hyp
NOTES
Assumes planar projection eg UTM.
EXAMPLE
SELECT COGO.ArcTan2(14,15) as atan2
FROM dual;
ATAN2
------------
0.7509290624
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
CardinalDirection -- Returns Compass point string equivalent of decimal degree numeric value.
SYNOPSIS
Function CardinalDirection(p_bearing in number,
p_abbreviation in integer default 1)
Return varchar2 Deterministic;
INPUTS
p_bearing (Number) -- Decimal degrees.
p_abbreviation (integer) -- Whether to return full text North (0) or abbreviation N (1), South West(0) or SW(1).
RESULT
Compass Point (varchar2) -- Compass point string for supplied bearing.
DESCRIPTION
This function converts a numeric decimal degree value into its textual Compass Point equivalent.
EXAMPLE
select COGO.CardinalDirection(15.8515065952945,t.IntValue) as CardinalDirection
from table(tools.generate_series(0,1,1)) t;
CARDINALDIRECTION
-----------------
NNE
North-NorthEast
-- All Compass Points
select COGO.DD2DMS(avg(t.IntValue)) as bearing,
COGO.CardinalDirection(t.IntValue,0) as CardinalDirection,
COGO.CardinalDirection(t.IntValue,1) as CardinalDirectionFull
from table(tools.generate_series(1,360,1)) t
group by COGO.CardinalDirection(t.IntValue,0),
COGO.CardinalDirection(t.IntValue,1);
BEARING CARDINALDIRECTION CARDINALDIRECTIONFULL
-------------- ----------------- ----------------
135°0'0" SE SouthEast
187°49'33.913" N North
90°0'0" E East
112°30'0" ESE East-SouthEast
180°0'0" S South
315°0'0" NW NorthWest
67°30'0" ENE East-NorthEast
337°30'0" NNW North-NorthWest
270°0'0" W West
157°30'0" SSE South-SouthEast
202°30'0" SSW South-SouthWest
292°30'0" WNW West-NorthWest
225°0'0" SW SouthWest
247°30'0" WSW West-SouthWest
22°30'0" NNE North-NorthEast
45°0'0" NE NorthEast
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
DD2DMS -- Returns string equivalent of decimal degree numeric value.
SYNOPSIS
Function DD2DMS(
dDecDeg in Number,
pDegree in NChar default '°',
pMinute in NChar default '''',
pSecond in NChar default '"'
)
Return varchar2 Deterministic;
INPUTS
dDecDeg (Number) - Decimal degrees.
pDegree (NChar) - Superscript degree value identifier eg °
pMinute (NChar) - Superscript minute value identifier eg '
pSecond (NChar) - Superscript second value identifier eg "
RESULT
Decimal Degrees (NUMBER) - eg 22.16972222.
DESCRIPTION
This function converts a numeric decimal degree value into its textual whole-circle bearing equivalent.
EXAMPLE
select COGO.DD2DMS(15.8515065952945,'^','''','"') as dms
from dual;
DMS
------------
15^51'5.424"
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
DD2TIME -- Supplied with a whole-circle bearing, this function returns its equivalent ClockFace Direction eg 45 => 1hr 30min.
SYNOPSIS
Function DD2TIME(p_dDecDeg in Number,
p_24_hour in integer default 0)
Return varchar2 Deterministic;
ARGUMENTS
p_dDecDeg (Number) -- Decimal degrees.
p_24_hour (integer) -- 12 hour (0) readout or 24 (1)
RESULT
Time as string (varchar2) -- ClockFace time as direction 45 degrees is same as 1Hr 30min
DESCRIPTION
This function converts a whole circular bearing in decimal degrees to its equivalent ClockFace Direction eg 45 => 1hr 30min.
Can return clockface directions as 12-14 hour references or 0-12 references.
EXAMPLE
select COGO.DD2TIME(t.IntValue,t12.IntValue) as clockface
from table(TOOLS.generate_series(0,360,45)) t,
table(TOOLS.generate_series(0,1,1)) t12
order by t12.IntValue, t.intValue;
CLOCKFACE
----------
0Hr 0min
1Hr 30min
3Hr 0min
4Hr 30min
6Hr 0min
7Hr 30min
9Hr 0min
10Hr 30min
12Hr 0min
12Hr 0min
13Hr 30min
15Hr 0min
16Hr 30min
18Hr 0min
19Hr 30min
21Hr 0min
22Hr 30min
24Hr 0min
18 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - September 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
DMS2DD -- Returns decimal degree value from string input.
SYNOPSIS
Function DMS2DD(strDegMinSec varchar2)
Return Number Deterministic;
INPUTS
strDegMinSec (varchar2) - Angle in DMS format (quandrantal, whole circle or Cardinal bearing), with/without separators
RESULT
Decimal Degrees (NUMBER) - eg 22.16972222.
DESCRIPTION
This function converts a textual representation of a degree value to its decimal equivalent.
EXAMPLE
select COGO.DMS2DD('15°51''5.424"') as dd
from DUAL;
DD
-----------------------------------------
15.85150666666666666666666666666666666667
select COGO.DMS2DD('22^10''11"') as dd
from DUAL;
DD
-----------
22.16972222
select COGO.DMS2DD('N22.1697E') as dd
from DUAL;
DD
-----------
22.16972222
select COGO.DMS2DD('S52E') as dd
from dual;
DD
--
52
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
PI -- Returns constant PI value.
SYNOPSIS
Function PI
Return Number Deterministic
DESCRIPTION
This function exposes static constant PI.
EXAMPLE
SELECT COGO.PI()
FROM DUAL;
COGO.PI()
---------------------------------------
3.1415926535897932384626433832795028842
RESULT
PI (NUMBER) - 3.1415926535897932384626433832795028842
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
QuadrantBearing -- Returns Quadrant Bearing string equivalent of decimal degree numeric value eg N34.5°E
SYNOPSIS
Function QuadrantBearing(p_bearing in number,
p_Degree in NChar default '°')
Return varchar2 Deterministic;
INPUTS
p_bearing (Number) -- Decimal degrees.
p_degree (NChar) -- Degree Symbol Superscript.
RESULT
Quadrant Bearing (varchar2) -- Quadrant bearing eg N34.5°E
DESCRIPTION
This function converts a numeric decimal degree value into its textual Quadrant bearing equivalent.
EXAMPLE
select COGO.QuadrantBearing(15.8515065952945,'^') as quadrantBearing
from dual;
QUADRANTBEARING
---------------
N15.852^E
select COGO.DD2DMS(t.IntValue) as bearing,
COGO.QuadrantBearing(t.IntValue) as QuadrantBearing
from table(tools.generate_series(0,315,45)) t
order by t.IntValue asc;
BEARING QUADRANTBEARING
---------- ---------------
0°0'0" N
45°0'0" N45°E
90°0'0" E
135°0'0" S45°E
180°0'0" S
225°0'0" S45°W
270°0'0" W
315°0'0" N45°W
8 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
ST_Degrees -- Converts input radians to whole circle bearing (0 North).
SYNOPSIS
Function ST_Degrees(p_radians in number,
p_normalize in integer default 1)
Return Number deterministic
DESCRIPTION
This function converts supplied radians value to whole circle bearing clockwise from 0 as North.
Also normalises bearing to 0..360 if requested.
INPUTS
p_radians (Number) - Angle in radians (clockwise from north)
p_normalize (Integer) - Normalises bearing to range 0..360 (defaul)
RESULT
degrees (NUMBER) - 0 to 360 degrees
EXAMPLE
SELECT Round(COGO.ST_Degrees(0.789491),4) as degrees
FROM dual;
DEGREES
----------
45.2345
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
ST_Normalize -- Converts input degree value to whole circle bearing between 0..360.
SYNOPSIS
Function ST_Normalize(p_degrees in number)
Return Number deterministic
DESCRIPTION
This function converts supplied degree value to whole circle bearing clockwise between 0..360.
INPUTS
p_degrees (Number) - Angle in degrees.
RESULT
degrees (Number) - 0 to 360 degrees
EXAMPLE
SELECT COGO.ST_Normalize(400) as degrees
FROM dual;
DEGREES
-------
40
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ COGO ] [ Functions ]
NAME
ST_Radians -- Converts input whole circle bearing (0 North) to radians.
SYNOPSIS
Function ST_Radians(p_radians in number)
Return Number deterministic
INPUTS
p_degrees (NUMBER) - Angle in degrees, clockwise from North.
DESCRIPTION
This function converts supplied decimal degree value to radians.
EXAMPLE
SELECT Round(COGO.ST_Radians(45.2345),6) as radians
FROM dual;
RADIANS
----------
.789491
RESULT
radians (NUMBER) - 0 to 2 x PI radians.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Modules ]
NAME
DEBUG - Functions that can be used to create string versions of complex types for output during debugging eg dbms_output.
DESCRIPTION
A package that publishes some functions that can be used to create string versions of complext types for output during debugging eg dbms_output.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
Procedure PrintPoint( p_point in mdsys.sdo_point_type, p_round in number default 3, p_prefix in varchar2 default null, p_linefeed in boolean default false); Procedure PrintPoint( p_point in mdsys.vertex_type, p_round in number default 3, p_prefix in varchar2 default null, p_linefeed in boolean default false); Procedure PrintPoint( p_point in &&INSTALL_SCHEMA..T_Vertex, p_round in number default 3, p_prefix in varchar2 default null, p_linefeed in boolean default false); Procedure PrintGeom( p_geom in mdsys.sdo_geometry, p_round in number default 3, p_linefeed in boolean default false, p_suffix_text in varchar2 default null); Procedure PrintGeom( p_geom in &&INSTALL_SCHEMA..T_Geometry, p_round in number default 3, p_linefeed in boolean default false, p_suffix_text in varchar2 default null); Function PrintGeom( p_geom in mdsys.sdo_geometry, p_round in number default 3, p_linefeed in integer default 0, p_prefix in varchar2 default null, p_relative in integer default 0) Return clob deterministic; Procedure PrintElemInfo( p_elem_info in mdsys.sdo_elem_info_array, p_linefeed in Boolean default false); Procedure PrintOrdinates(p_ordinates in mdsys.sdo_ordinate_array, p_coordDim in pls_integer default 2, p_round in pls_integer default 3, p_linefeed in Boolean default false);
[ Top ] [ Modules ]
NAME
PRINT - Functions that can be used to create string versions of complex types for output during debugging eg dbms_output.
DESCRIPTION
A package that publishes some functions that can be used to create string versions of complex types for output during debugging eg dbms_output.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
SOURCE
Function sdo_point_type( p_point in mdsys.sdo_point_type, p_round in number default 3) Return varchar2 deterministic; Function Vertex_Type(p_point in mdsys.vertex_type, p_round in number default 3) Return varchar2 deterministic; Function sdo_elem_info( p_elem_info in mdsys.sdo_elem_info_array ) return varchar2 deterministic; Function sdo_ordinates(p_ordinates in mdsys.sdo_ordinate_array, p_coordDim in pls_integer default 2, p_round in pls_integer default 3) Return clob deterministic; Function sdo_geometry(p_geom in mdsys.sdo_geometry, p_round in number default 3) Return clob deterministic;
[ Top ] [ Modules ]
NAME
ST_LRS - A package that publishes an SDO_LRS view of the T_GEOMETRY object's ST_LRS* functions.
DESCRIPTION
A package that publishes an SDO_LRS view of the T_GEOMETRY object's ST_LRS* functions.
This is an example of what could be done to help Locator users use my LRS code and be in a position
to migrate with minimal effort to Oracle Spatial's Enterprise SDO_LRS code.
If this package is extended, please supply the changed package to me via simon@spatialdbadvisor.com
TODO
CONNECTED_GEOM_SEGMENTS
GET_NEXT_SHAPE_PT
GET_NEXT_SHAPE_PT_MEASURE
GET_PREV_SHAPE_PT
GET_PREV_SHAPE_PT_MEASURE
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
FUNCTION FIND_LRS_DIM_POS(lrs_geometry IN mdsys.sdo_geometry, tolerance in number default 0.005) RETURN INTEGER DETERMINISTIC; FUNCTION FIND_LRS_DIM_POS(table_name IN VARCHAR2, column_name IN VARCHAR2) RETURN INTEGER DETERMINISTIC; FUNCTION GEOM_SEGMENT_END_MEASURE(lrs_segment IN mdsys.sdo_geometry) RETURN NUMBER DETERMINISTIC; FUNCTION GEOM_SEGMENT_START_MEASURE(lrs_segment IN mdsys.sdo_geometry) RETURN NUMBER DETERMINISTIC; /** * Description * Returns the measure range of a geometric segment, that is, the difference between the start measure and end measure. **/ FUNCTION MEASURE_RANGE(lrs_segment IN mdsys.sdo_geometry, dim_array IN mdsys.sdo_dim_ARRAY DEFAULT NULL) RETURN NUMBER DETERMINISTIC; FUNCTION GEOM_SEGMENT_START_PT(geom_segment IN mdsys.sdo_geometry) RETURN mdsys.sdo_geometry Deterministic; FUNCTION GEOM_SEGMENT_END_PT(geom_segment IN mdsys.sdo_geometry) RETURN mdsys.sdo_geometry Deterministic; Function IS_SHAPE_PT_MEASURE(geom_segment in mdsys.sdo_geometry, measure in number) RETURN VARCHAR2 Deterministic; Function SET_PT_MEASURE(lrs_segment in mdsys.sdo_geometry, point IN mdsys.sdo_geometry, measure IN NUMBER, tolerance in number default 0.005) RETURN mdsys.sdo_geometry Deterministic; FUNCTION GET_MEASURE(point IN mdsys.sdo_geometry) RETURN NUMBER DETERMINISTIC; FUNCTION IS_MEASURE_INCREASING (lrs_segment IN mdsys.sdo_geometry) RETURN VARCHAR2 DETERMINISTIC; FUNCTION IS_MEASURE_DECREASING (lrs_segment IN mdsys.sdo_geometry) RETURN VARCHAR2 DETERMINISTIC; /** * The start and end measures of geom_segment must be defined (cannot be null), * and any measures assigned must be in an ascending or descending order along the segment direction. **/ FUNCTION IS_GEOM_SEGMENT_DEFINED(geom_segment IN mdsys.sdo_geometry, dim_array IN mdsys.sdo_dim_ARRAY DEFAULT NULL) RETURN VARCHAR2 DETERMINISTIC; FUNCTION MEASURE_TO_PERCENTAGE(lrs_segment IN mdsys.sdo_geometry, measure IN NUMBER) RETURN NUMBER DETERMINISTIC; FUNCTION PERCENTAGE_TO_MEASURE(lrs_segment IN mdsys.sdo_geometry, percentage IN NUMBER) RETURN NUMBER DETERMINISTIC; Function GEOM_SEGMENT_LENGTH(geom_segment in mdsys.sdo_geometry, unit in varchar2 default null) RETURN NUMBER Deterministic; FUNCTION SPLIT_GEOM_SEGMENT(geom_segment IN mdsys.sdo_geometry, split_measure IN NUMBER, tolerance IN NUMBER DEFAULT 0.005) RETURN mdsys.sdo_geometry_array pipelined; PROCEDURE SPLIT_GEOM_SEGMENT(geom_segment IN mdsys.sdo_geometry, split_measure IN NUMBER, segment_1 IN OUT NOCOPY mdsys.sdo_geometry, segment_2 IN OUT NOCOPY mdsys.sdo_geometry, tolerance IN NUMBER DEFAULT 0.005); FUNCTION CONCATENATE_GEOM_SEGMENTS(geom_segment_1 IN mdsys.sdo_geometry, geom_segment_2 IN mdsys.sdo_geometry, tolerance IN NUMBER DEFAULT 0.005, unit IN varchar2 default null) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION CLIP_GEOM_SEGMENT(GEOM_SEGMENT IN mdsys.sdo_geometry, START_MEASURE IN NUMBER, END_MEASURE IN NUMBER, TOLERANCE IN NUMBER DEFAULT 0.005, UNIT IN VARCHAR2 DEFAULT NULL) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION LOCATE_PT(GEOM_SEGMENT IN mdsys.sdo_geometry, MEASURE IN NUMBER, OFFSET IN NUMBER, TOLERANCE IN NUMBER DEFAULT 0.005, UNIT IN VARCHAR2 DEFAULT NULL) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION FIND_OFFSET (GEOM_SEGMENT IN mdsys.sdo_geometry, POINT IN mdsys.sdo_geometry, TOLERANCE IN NUMBER DEFAULT 0.005, UNIT IN VARCHAR2 DEFAULT NULL) RETURN NUMBER DETERMINISTIC; FUNCTION FIND_MEASURE(lrs_segment IN mdsys.sdo_geometry, POINT IN mdsys.sdo_geometry, TOLERANCE IN NUMBER DEFAULT 0.005, UNIT IN VARCHAR2 DEFAULT NULL) RETURN NUMBER DETERMINISTIC; FUNCTION PROJECT_PT (GEOM_SEGMENT IN mdsys.sdo_geometry, POINT IN mdsys.sdo_geometry, TOLERANCE IN NUMBER DEFAULT 0.005, UNIT IN VARCHAR2 DEFAULT NULL) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION LRS_INTERSECTION(GEOM_1 IN mdsys.sdo_geometry, GEOM_2 IN mdsys.sdo_geometry, TOLERANCE IN NUMBER DEFAULT 0.005) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION REVERSE_MEASURE (lrs_segment IN mdsys.sdo_geometry) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION REVERSE_GEOMETRY (geom_segment IN mdsys.sdo_geometry) RETURN mdsys.sdo_geometry DETERMINISTIC; /* Populates the measures of all shape points based on the start and end measures of a geometric segment, overriding any previously assigned measures between the start point and end point.*/ Function REDEFINE_GEOM_SEGMENT(geom_segment IN mdsys.sdo_geometry, start_measure IN NUMBER, end_measure IN NUMBER) RETURN mdsys.sdo_geometry DETERMINISTIC; Procedure REDEFINE_GEOM_SEGMENT(geom_segment IN OUT NOCOPY mdsys.sdo_geometry, start_measure IN NUMBER, end_measure IN NUMBER); PROCEDURE RESET_MEASURE(lrs_segment in OUT NOCOPY mdsys.sdo_geometry); FUNCTION RESET_MEASURE(lrs_segment IN mdsys.sdo_geometry) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION TRANSLATE_MEASURE(geom_segment IN mdsys.sdo_geometry, translate_m IN NUMBER) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION CONVERT_TO_STD_GEOM(lrs_segment IN mdsys.sdo_geometry) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION CONVERT_TO_LRS_GEOM(standard_geom IN mdsys.sdo_geometry, start_measure IN NUMBER DEFAULT NULL, end_measure IN NUMBER DEFAULT NULL) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION SCALE_GEOM_SEGMENT(lrs_segment IN mdsys.sdo_geometry, start_measure IN NUMBER, end_measure IN NUMBER, shift_measure IN NUMBER, tolerance IN NUMBER DEFAULT 0.005 ) RETURN mdsys.sdo_geometry DETERMINISTIC; FUNCTION DYNAMIC_SEGMENT(GEOM_SEGMENT IN mdsys.sdo_geometry, START_MEASURE IN NUMBER, END_MEASURE IN NUMBER, TOLERANCE IN NUMBER DEFAULT 0.005, UNIT IN VARCHAR2 DEFAULT NULL) RETURN mdsys.sdo_geometry DETERMINISTIC; Function OFFSET_GEOM_SEGMENT(geom_segment IN mdsys.sdo_geometry, start_measure IN NUMBER, end_measure IN NUMBER, offset IN NUMBER DEFAULT 0, tolerance IN NUMBER DEFAULT 0.005, unit IN VARCHAR2 default null) RETURN mdsys.sdo_geometry Deterministic; Function VALID_GEOM_SEGMENT(geom_segment IN mdsys.sdo_geometry, dim_array IN mdsys.sdo_dim_ARRAY default null) RETURN VARCHAR2 Deterministic; Function VALID_LRS_PT(point IN mdsys.sdo_geometry, dim_array IN mdsys.sdo_dim_ARRAY DEFAULT NULL) RETURN VARCHAR2 Deterministic; Function VALID_MEASURE(geom_segment in mdsys.sdo_geometry, measure in number) RETURN VARCHAR2 Deterministic; Function VALIDATE_LRS_GEOMETRY(geom_segment in mdsys.sdo_geometry, dim_array in mdsys.sdo_dim_ARRAY default null) RETURN VARCHAR2 Deterministic; Function ROUND_COORDINATES(geom_segment in mdsys.sdo_geometry, p_dec_places_x in integer default null, p_dec_places_y in integer default null, p_dec_places_z in integer default null, p_dec_places_m in integer default null) RETURN mdsys.sdo_geometry Deterministic;
[ Top ] [ Modules ]
NAME
TOOLS - A collection of common functions used by other packages and object types.
DESCRIPTION
A package that publishes a collection of common functions used by other packages and object types.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ TOOLS ] [ Functions ]
NAME
Generate_Series -- Function that generates a series of numbers mimicking PostGIS's function with the same name
SYNOPSIS
Function generate_series(p_start pls_integer,
p_end pls_integer,
p_step pls_integer
)
Return &&INSTALL_SCHEMA..T_IntValues Pipelined;
EXAMPLE
with data as (
select sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null) as line
from dual
)
select t.IntValue as point_id,
v.x,
v.y
from data a,
table(tools.generate_series(1,sdo_util.GetNumVertices(a.line),1)) t,
table(sdo_util.getvertices(a.line)) v
where v.id =t.intValue;
POINT_ID X Y
---------- ---------- ----------
1 0 0
2 10 0
3 10 5
4 10 10
5 5 10
6 5 5
6 rows selected
INPUTS
p_start (Integer) - Starting value p_end (Integer) - Ending value. p_step (Integer) - The step value of the increment between start and end RETURN Array of Integers (T_IntValues)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2008 - Original coding.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ TOOLS ] [ Functions ]
NAME
ST_DB_Version -- Returns Database Version and sub version.
SYNOPSIS
Static Function ST_DB_Version
Return Number Determinisitc
DESCRIPTION
This function return database version which is useful when handling Oracle functions that only appear in certain versions
RESULT
Database Version (NUMBER) - eg 11.2 Database(12.1)
EXAMPLE
select T_GEOMETRY.ST_DB_Version() as database_version
from DUAL;
DATABASE_VERSION
----------------
11.2
AUTHOR
Simon Greener
HISTORY
Simon Greener - May 2016 - Original coding.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ TOOLS ] [ Functions ]
NAME
ST_GetSridType - Determines ref sys kind of provided p_srid
SYNOPSIS
Function ST_GetSridType(p_srid IN Integer)
Return VarChar2 Deterministic;
DESCRIPTION
Given a null p_srid this function returns PLANAR.
The the p_srid is not null the function checks the Mdsys.Sdo_Coord_Ref_System table's coord_ref_sys_kind column, mapping its values as follows:
COMPOUND ==> PLANAR,
ENGINEERING ==> PLANAR,
GEOGENTRIC ==> GEOGRAPHIC,
GEOGRAPHIC2D ==> GEOGRAPHIC,
GEOGRAPHIC3D ==> GEOGRAPHIC,
PROJECTED ==> PLANAR,
VERTICAL ==> GEOGRAPHIC,
INPUTS
p_srid (integer) - Returns PLANAR or GEOGRAPHIC
NOTE
Used mainly in determinining type of arithmetic to be used when calculating distances etc
EXAMPLE
select distinct f.sridType
from (select Tools.ST_GetSridType(a.srid) as SridType
from cs_srs a
order by DBMS_RANDOM.VALUE
) f
where rownum < 100;
SRIDTYPE
----------
PLANAR
GEOGRAPHIC
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2011 - Original coding.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
NAME
ST_isLocator -- Makes best effort to osee if database is a locator databases.
SYNOPSIS
Function ST_isLocator
Return INTEGER Deterministic,
DESCRIPTION
A method that attempts to determine if the host database is a Locator database or has Spatial objects.
RESULT
BOOLEAN (INTEGER) -- 1 Is Locator else 0 (Spatial)
EXAMPLE
select T_GEOMETRY.ST_isLocator() as isLocator
from dual;
ISLOCATOR
---------
0
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2016 - Original coding.
COPYRIGHT
(c) 2012-2017 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ TOOLS ] [ Functions ]
NAME
TokenAggregator - A string aggregator.
SYNOPSIS
Function TokenAggregator(p_tokenSet IN &&INSTALL_SCHEMA..T_Tokens,
p_delimiter IN VarChar2 DEFAULT ',')
Return VarChar2 Deterministic;
DESCRIPTION
Takes a set of strings an aggregates/appends them using supplied separator
INPUTS
p_tokenSet (T_Tokens) - The strings to be aggregated.
p_separator (varchar2) - The character that is placed between each token string.
NOTE
Requires t_Tokens Object Type to exist.
EXAMPLE
with data as (
select t.ID, T.TOKEN, T.sEPARATOR
from table(TOOLS.Tokenizer('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',',()')) t
)
select TOOLS.TokenAggregator(tokens,',') AS result
from (select CAST(COLLECT(codesys.T_Token(l.id,l.token,l.separator)) AS T_Tokens) as tokens
from data l
) f;
RESULT
----------------------------------------
LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2011 - Original coding.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ TOOLS ] [ Functions ]
NAME
Tokenizer - Splits any string into tokens and separators.
SYNOPSIS
Function Tokenizer (
p_string varchar2,
OR p_string varchar2,
p_separators varchar2 default ' '
)
Return T_Tokens Pipelined
Where T_Tokens is array of T_Token:
id integer,
token varchar2(30000),
separator varchar2(30000)
)
DESCRIPTION
Supplied a string and a list of separators this function returns resultant tokens as a table collection.
Function returns both the token and the separator.
Returned table collection contains a unique identifier to ensure tokens and separators are always correctly ordered.
INPUTS
p_string (varchar 30000) - Any non-null string.
p_separators (varchar 30000) - List of separators eg '(),'
RESULT
Table (Array) of T_TOKEN:
id (integer) - Unique identifier for each row starting with first token/separator found.
token (varchar 30000) - Token between separators
separator (varchar 30000) - Separator between tokens.
EXAMPLE
select t.id, t.token, t.separator
from table(TOOLS.Tokenizer('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',',()')) t
ID TOKEN SEPARATOR
-- ---------- ---------
1 LINESTRING (
2 0 0 ,
3 10 0 ,
4 10 5 ,
5 10 10 ,
6 5 10 ,
7 5 5 )
7 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2008 - Original coding.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Structures ]
NAME
T_BEARING_DISTANCES - Array of T_BEARING_DISTANCE Objects.
DESCRIPTION
An array of T_BEARING_DISTANCE objects used to fully describe a single polygon ring or linestring object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_BEARING_DISTANCES AS TABLE OF &&INSTALL_SCHEMA..T_BEARING_DISTANCE;
[ Top ] [ Structures ]
NAME
T_ELEMINFOSET -- A type representing an array (collection) of T_ELEMINFO objects.
DESCRIPTION
An array of T_ELEMINFO objects that represent an ordered set of sdo_elem_info triplets.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_ElemInfoSet IS TABLE OF &&INSTALL_SCHEMA..T_ElemInfo;
[ Top ] [ Structures ]
NAME
T_GEOMETRIES -- Array (collection) of T_GEOMETRY_ROW Objects.
DESCRIPTION
An array if T_GEOMETRY_ROW objects used in PIPELINED Functions.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package for &&INSTALL_SCHEMA..
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_GEOMETRIES AS TABLE OF &&INSTALL_SCHEMA..T_GEOMETRY_ROW;
[ Top ] [ Structures ]
NAME
T_GRIDS -- An array (collection/table) of T_GRIDs.
DESCRIPTION
An array of T_GRID objects that represents an array of optimized rectangles
representing a grid, matrix or "raster".
Used mainly by PIPELINED T_GEOMETRY methods.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_Grids IS TABLE OF &&INSTALL_SCHEMA..T_Grid;
[ Top ] [ Structures ]
NAME
T_INTVALUES -- Object type representing a collection (array) of T_INTVALUE objects.
DESCRIPTION
An array of T_INTVALUE objects that represent an ordered set of tokens and separators extracted from a string by the Tokenizer function.
Used by PIPELINED Tokenizer function.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_INTVALUES IS TABLE OF &&INSTALL_SCHEMA..T_INTVALUE;
[ Top ] [ Structures ]
NAME
T_SEGMENTS -- An array (collection/table) of T_SEGMENT type.
DESCRIPTION
An array of T_SEGMENT that a PIPELINED function can use to return T_SEGMENT objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_SEGMENTS AS TABLE OF &&INSTALL_SCHEMA..T_SEGMENT
[ Top ] [ Structures ]
NAME
T_TOKENS -- Object type representing a collection (array) of T_TOKEN objects.
DESCRIPTION
An array of T_TOKEN objects that represent an ordered set of tokens and separators extracted from a string by the Tokenizer function.
Used by PIPELINED Tokenizer function.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
CREATE OR REPLACE TYPE &&INSTALL_SCHEMA..T_TOKENS IS TABLE OF &&INSTALL_SCHEMA..T_TOKEN;
[ Top ] [ Types ]
NAME
T_BEARING_DISTANCE - Object Type representing a single bearing and distance COGO instruction.
DESCRIPTION
An object type that represents a set of bearing/distance instructions for building the sides of a polygon, or the segments of a linestring.
NOTES
No methods are declared on this type.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_BEARING_DISTANCE ] [ Variables ]
ATTRIBUTES
sDegMinSec varchar2(255) -- Textual description of a bearing eg 180^10'5.2" (cf Google).
See also function COGO.DMS2DD.
nBearing number, -- A numeric bearing eg 180.092784
distance number, -- Length of line along line defined by bearing.
Z number, -- Z ordinate of point at end of bearing/distance (line cogo function only)
NOTES
Normally only one or the other of the sDegMinSec or nBearing attributes are defined.
SOURCE
Bearing number, Distance number, Z number,
[ Top ] [ T_BEARING_DISTANCE ] [ Methods ]
NAME
A collection of T_BEARING_DISTANCE Constructors.
INPUT
p_sDegMinSec varchar2 -- Textual description of a bearing eg 180^10'5.2" (cf Google).
Converted to internal bearing attribute via call to COGO.DMS2DEG.
SOURCE
Constructor Function T_BEARING_DISTANCE ( p_sDegMinSec in varchar2, p_distance in number ) Return Self As Result, Constructor Function T_BEARING_DISTANCE ( p_bearing in number, p_distance in number ) Return Self As Result, Constructor Function T_BEARING_DISTANCE ( p_sDegMinSec in varchar2, p_distance in number, p_z in number ) Return Self As Result
[ Top ] [ Types ]
NAME
T_ELEMINFO -- Object type representing single mdsys.sdo_elem_info triplet.
DESCRIPTION
An object type that represents an sdo_elem_info_array "triplet" as a single object.
NOTES
No methods are declared on this type.
TODO
Methods on an T_ELEMINFO may be added in future.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_ELEMINFO ] [ Variables ]
ATTRIBUTES
offset -- Offset value from Element_Info triplet
etype -- eType value from Element_Info triplet, describes geometry element.
interpretation -- Interpretation value from Element_Info triplet eg 1 is vertex-connected; 3 is optimized rectangle; etc.
SOURCE
offset NUMBER, etype NUMBER, interpretation NUMBER
[ Top ] [ Types ]
NAME
T_GEOMETRY Object Type
DESCRIPTION
An object type that represents a single SDO_GEOMETRY geometry object.
Includes Methods on that type.
WARNINGS
This type should only be used for programming and should not be stored in the database.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package for &&INSTALL_SCHEMA..
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Variables ]
ATTRIBUTES
geom -- mdsys.sdo_geometry Object
tolerance -- Standard SDO_TOLERANCE value.
Since we need the geometry's tolerance for some operations eg sdo_area etc
let's add it to the type rather than have to supply it all the time to member functions
dPrecision -- Number of Significant Decimal Digits of precision. (PRECISION is an Oracle name)
Some operations require the comparison of two ordinates. For geodetic data this is
not the same as an Oracle tolerance. We allow a user to supply this value for all data
but if set to null it will assume a value based on the tolerance.
projected -- Whether mdsys.sdo_geometry ordinates are Geodetic (0), Projected (1), or NULL (not defined).
When creating and using bearing and distances one needs to know if the geometry
is projected or not. While one could do this by dynamic query to the database
each time it is needed, an additional property helps us to record this once.
SOURCE
geom mdsys.sdo_geometry, tolerance number, dPrecision integer, projected integer,
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
T_GEOMETRY(EWKT CLOB)-- Constructor that creates an sdo_geometry object from the passed in EWKT.
SYNOPSIS
Constructor Function T_GEOMETRY(p_ewkt IN CLOB)
Return Self As Result,
DESCRIPTION
The p_ewkt parameter can be a 2D or greater WKT object.
ARGUMENTS
p_ewkt (CLOB) -- Any non-null WKT or EWKT object
EXAMPLE
See ST_FromEWKT().
AUTHOR
Simon Greener
HISTORY
Simon Greener - September 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
T_GEOMETRY(sdo_geometry_array) -- Constructor that creates a GeometryCollection from an array of sdo_geometry objects.
SYNOPSIS
Constructor Function T_GEOMETRY(p_geoms IN mdsys.sdo_geometry_array)
Return Self As Result,
DESCRIPTION
The p_geoms geometry array parameter should contain at least one element.
The sdo_geometry objects within the array should have the same dimension, if not the lowest is chosen (cf ST_To2D etc).
All p_geoms objects should be in the same SRID.
ARGUMENTS
p_geoms (mdsys.sdo_geometry_array) -- Any non-null, geometry array
EXAMPLE
With data as (
select sdo_geometry('POINT(1 2)',null) as tgeom From Dual
UNION ALL select sdo_geometry(2001,NULL,SDO_POINT_TYPE(3,4,null),null,null) as tgeom From Dual
UNION ALL select sdo_geometry('LINESTRING(5 1,10 1,10 5,10 10,5 10,5 5)',null) as tgeom From Dual
UNION ALL select sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,10,0,10,5,10,10,5,10,5,5)) as tgeom From Dual
UNION ALL select sdo_geometry('MULTILINESTRING((-1 -1, 0 -1),(0 0,10 0,10 5,10 10,5 10,5 5))',null) as tgeom From Dual
UNION ALL select sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null) as tgeom From Dual
UNION ALL select sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null) as tgeom From Dual
)
select t_geometry(
cast(collect(a.tgeom) as mdsys.sdo_geometry_array)
).geom as gArray
from data a;
GARRAYGEOM
-----------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2004,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1,1, 3,1,1, 5,2,1, 17,2,1, 29,2,1, 33,2,1, 45,1003,1, 55,2003,1, 65,1003,1, 75,2003,1, 85,2003,1, 95,1003,1),
SDO_ORDINATE_ARRAY(1,2, 3,4, 5,1, 10,1, 10,5, 10,10, 5,10, 5,5, 0,0, 10,0, 10,5, 10,10, 5,10, 5,5, -1,-1, 0,-1,
0,0, 10,0, 10,5, 10,10, 5,10, 5,5,
0,0, 20,0, 20,20, 0,20, 0,0,
10,10, 10,11, 11,11, 11,10, 10,10,
0,0, 20,0, 20,20, 0,20, 0,0,
10,10, 10,11, 11,11, 11,10, 10,10,
5,5, 5,7, 7,7, 7,5, 5,5,
100,100, 200,100, 200,200, 100,200, 100,100))
AUTHOR
Simon Greener
HISTORY
Simon Greener - September 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
A collection of "standard" T_GEOMETRY Constructors.
SOURCE
Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY) Return Self As Result, Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY, p_geom IN mdsys.sdo_geometry) Return Self As Result, Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY, p_geom in mdsys.sdo_geometry, p_tolerance in number) Return Self As Result, Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY, p_geom in mdsys.sdo_geometry, p_tolerance in number, p_dPrecision in integer) Return Self As Result, Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY, p_geom in mdsys.sdo_geometry, p_tolerance in number, p_dPrecision in integer, p_projected in varchar2) Return Self As Result, Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY, p_vertex in mdsys.vertex_type, p_srid in integer, p_tolerance in number default 0.005) Return Self As Result, Constructor Function T_GEOMETRY(SELF IN OUT NOCOPY T_GEOMETRY, p_segment in &&INSTALL_SCHEMA..T_SEGMENT) Return Self As Result,
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
OrderBy -- Implements ordering function that can be used to sort a collection of T_GEOMETRY objects.
SYNOPSIS
Order Member Function OrderBy(p_compare_geom in &&INSTALL_SCHEMA..T_GEOMETRY)
Return Number deterministic
ARGUMENTS
p_compare_geom (T_GEOMETRY) - Order pair
DESCRIPTION
This order by function allows a collection of T_GEOMETRY objects to be sorted.
For example in the ORDER BY clause of a select statement. Comparison uses all ordinates: X, Y, Z and W.
EXAMPLE
With geometries as (
select t_geometry(sdo_geometry(2001,null,
sdo_point_type(dbms_random.value(0,level),
dbms_random.value(0,level),
null),
null,null),
0.005,
3,
1) as tgeom
from dual
connect by level < 10
)
select a.tgeom.st_astext(2) as sGeom
from geometries a
order by a.tgeom;
SGEOM
------------------------------------------------------------------------------------------
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(0.39,0.87,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(0.71,0.04,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(1.68,1.03,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(1.72,1.45,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(2.68,1.99,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(3.12,1.14,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(3.38,0.71,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(4.75,4.46,NULL),NULL,NULL);TOLERANCE(.05)
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(5.49,6.87,NULL),NULL,NULL);TOLERANCE(.05)
9 rows selected
RESULT
order value (Number) - -1 less than; 0 equal; 1 greater than
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Add_SEGMENT -- Adds a segment to an existing geometry.
SYNOPSIS
Member Function ST_Add_SEGMENT (p_SEGMENT in &&INSTALL_SCHEMA..T_SEGMENT)
Return &&INSTALL_SCHEMA..T_Geometry deterministic,
DESCRIPTION
Adds a segment to an existing geometry.
If last vertex of existing geometry equals first vertex of segment the point is not repeated.
Supports segments that define a circular arc.
ARGUMENTS
p_SEGMENT (T_SEGMENT) - Valid segment. Supports 2 vertex or 3 vertex circular arc segments.
RESULT
geometry (T_GEOMETRY) - Modified geometry
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Affine -- Applies a 3d affine transformation to the geometry to do things like translate, rotate, scale in one step.
SYNOPSIS
Member Function ST_Affine (
p_a in number,
p_b in number,
p_c in number,
p_d in number,
p_e in number,
p_f in number,
p_g in number,
p_h in number,
p_i in number,
p_xoff in number,
p_yoff in number,
p_zoff in number)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Applies a 3d affine transformation to the geometry to do things like translate, rotate, scale in one step.
To apply a 2D affine transformation only supply a, b, d, e, xoff, yoff
The vertices are transformed as follows:
x' = a*x + b*y + c*z + xoff
y' = d*x + e*y + f*z + yoff
z' = g*x + h*y + i*z + zoff
ARGUMENTS
a, b, c, d, e, f, g, h, i, xoff, yoff, zoff (all number s)
Represent the transformation matrix
-----------------
| a b c xoff |
| d e f yoff |
| g h i zoff |
| 0 0 0 1 |
-----------------
RESULT
geometry (T_GEOMETRY) -- Transformed geometry
EXAMPLE
SELECT t_geometry(sdo_geometry(3001,null,sdo_point_type(1,2,3),null,null),0.05,1,1)
.ST_Affine(p_a=>COS(COGO.pi()),
p_b=>0.0-SIN(COGO.pi()),
p_c=>0.0,
p_d=>SIN(COGO.pi()),
p_e=>COS(COGO.pi()),
p_f=>0.0,
p_g=>0.0,
p_h=>0.0,
p_i=>1.0,
p_xoff=>0.0,
p_yoff=>0.0,
p_zoff=>0.0).geom As affine_geom
FROM dual;
AFFINE_GEOM
--------------------------------------------------------------
SDO_GEOMETRY(3001,NULL,SDO_POINT_TYPE(-1.0,-2.0,3.0),NULL,NULL)
--Rotate a 3d line 180 degrees in both the x and z axis
SELECT f.the_geom
.ST_Affine(cos(COGO.PI()), -sin(COGO.PI()), 0, sin(COGO.PI()), cos(COGO.PI()), -sin(COGO.PI()), 0, sin(COGO.PI()), cos(COGO.PI()), 0, 0, 0).geom as affine_geom
FROM (select T_Geometry(sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,2,3,1,4,3)),0.005,2,1) As the_geom
from dual
) f;
AFFINE_GEOM
-----------
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(-1.0,-2.0,-3.0, -1.0,-4.0,-3.0))
-- Rotate a 3d line 180 degrees about the z axis.
select t_geometry(sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,2,3, 1,4,3)),0.05,1,1)
.ST_Affine(p_a=>COS(COGO.pi()),
p_b=>0.0-SIN(COGO.pi()),
p_c=>0.0,
p_d=>SIN(COGO.pi()),
p_e=>COS(COGO.pi()),
p_f=>0.0,
p_g=>0.0,
p_h=>0.0,
p_i=>1.0,
p_xoff=>0.0,
p_yoff=>0.0,
p_zoff=>0.0).geom
As affine_geom
from dual;
AFFINE_GEOM
--------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(-1.0,-2.0,3.0, -1.0,-4.0,3.0))
REQUIRES
SYS.UTL_NLA Package
SYS.UTL_NLA_ARRAY_DBL Type
SYS.UTL_NLA_ARRAY_INT Type
NOTES
Cartesian arithmetic only
Not for Oracle XE. Only 10g and above.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Feb 2009 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Append -- Appends sdo_geometry to underlying sdo_geometry.
SYNOPSIS
Member Function ST_Append ()
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
RESULT
MultiGeometry (T_GEOMETRY) -- If not already a multi geometry, returns multi-geometry object with 1 geometry;
DESCRIPTION
Appends p_geom sdo_geometry value to underlying SELF.geom sdo_geometry.
Can be used to append points to points, points to lines, lines to lines, lines to polygons etc.
Detects if two adjacent vertices are within tolerance distance and merges if they are.
For linestrings, p_concatenate mode of 0 appends without checking for duplicate end points and returns a multilinestring.
If p_concatentate is 1 and an end/start point equality relationship is detected, only one coordinate is stored, and a single linestring returned.
It is not implemented using SDO_UTIL.APPEND.
NOTES
Oracle's SDO_UTIL.APPEND supports 2 and 3D geometies but SDO_UTIL.CONCAT_LINES only supports 2D data.
Also, if underlying linestring geometry is measured, SDO_LRS.CONCATENATE_GEOM_SEGMENTS must be called.
This function implements all these Oracle functions under one "umbrella".
EXAMPLE
With data as (
select t_geometry(SDO_GEOMETRY(3001,NULL,SDO_POINT_TYPE(157503.148,6568556.703,50.647),null,null)) as tPoint from dual
)
select 'Point+Point' as test, a.tPoint.ST_Append(SDO_GEOMETRY(3001,null,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(158506.165,6568585.072,26.556))).geom as geom
from data a union all
select 'Point+SdoPoint' as test, a.tPoint.ST_Append(SDO_GEOMETRY(3001,null,SDO_POINT_TYPE(158506.165,6568585.072,26.556),null,null)).geom as geom
from data a union all
select 'Point+MultiPoint' as test, a.tPoint.ST_Append(SDO_GEOMETRY(3005,null,NULL,SDO_ELEM_INFO_ARRAY(1,1,2),SDO_ORDINATE_ARRAY(157500.896,6568571.813,38.453, 158506.165,6568585.072,26.556))).geom as geom
from data a;
TEST GEOM
---------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
Point+Point SDO_GEOMETRY(3005,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,2),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,158506.165,6568585.072,26.556))
Point+SdoPoint SDO_GEOMETRY(3005,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,2),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,158506.165,6568585.072,26.556))
Point+MultiPoint SDO_GEOMETRY(3005,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,3),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157500.896,6568571.813,38.453,158506.165,6568585.072,26.556))
select 'Two 3002 Lines with common point => 3002/3006' as test,
case when t.IntValue = 0 then 'Append' else 'Concatenate' end as testMode,
t_geometry(SDO_GEOMETRY(3002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573)))
.ST_Append(SDO_GEOMETRY(3002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY( 157512.499,6568585.998,15.573,157519.107,6568582.067,2.382)),
t.IntValue).geom as geom
from dual a,
table(tools.generate_series(0,1,1)) t
union all
select 'Two 2002 Lines with common point => 2002/2006' as test,
case when t.IntValue = 0 then 'Append' else 'Concatenate' end as testMode,
t_geometry(SDO_GEOMETRY(2002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998)))
.ST_Append(SDO_GEOMETRY(2002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY( 157512.499,6568585.998,157519.107,6568582.067)),
t.IntValue).geom
from dual a,
table(TOOLS.generate_series(0,1,1)) t
union all
select 'Two 3002 with no common point => 3006' as test,
'Append' as test_mode,
t_geometry(SDO_GEOMETRY(3002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573)))
.ST_Append(SDO_GEOMETRY(3002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(157520.228,6568574.745,1.46,157512.15,6568564.565,28.219)),0).geom
from dual
union all
select 'Two 2002 with no common point => 2006' as test,
'Append' as test_mode,
t_geometry(SDO_GEOMETRY(2002,null,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998)))
.ST_Append(SDO_GEOMETRY(2002,null,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(157520.228,6568574.745,157512.15,6568564.565)),0).geom
from dual;
TEST TESTMODE GEOM
--------------------------------------------- ----------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Two 3002 Lines with common point => 3002/3006 Append SDO_GEOMETRY(3006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,7,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573,157512.499,6568585.998,15.573,157519.107,6568582.067,2.382))
Two 3002 Lines with common point => 3002/3006 Concatenate SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573,157519.107,6568582.067,2.382))
Two 2002 Lines with common point => 2002/2006 Append SDO_GEOMETRY(2006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,5,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998,157512.499,6568585.998,157519.107,6568582.067))
Two 2002 Lines with common point => 2002/2006 Concatenate SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998,157519.107,6568582.067))
Two 3002 with no common point => 3006 Append SDO_GEOMETRY(3006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,7,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573,157520.228,6568574.745,1.46,157512.15,6568564.565,28.219))
Two 2002 with no common point => 2006 Append SDO_GEOMETRY(2006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,5,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998,157520.228,6568574.745,157512.15,6568564.565))
6 rows selected
select case when t.IntValue = 0
then 'Append Linestring 2002 and Point 2001 => 2004'
else 'Concat Linestring 2002 and Point 2001 => 2002'
end as test,
t_geometry(SDO_GEOMETRY(2002,null,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703, 157512.499,6568585.998)))
.ST_Append(SDO_GEOMETRY(2001,null,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(157512.499,6568585.998)),
t.IntValue).geom as geom
from table(TOOLS.generate_series(0,1,1)) t
Union all
select case when t.IntValue = 0
then 'Append Linestring 3002 and Point 3001 => 3004'
else 'Concat Linestring 3002 and Point 3001 => 3002'
end as test,
t_geometry(SDO_GEOMETRY(3002,null,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647, 157512.499,6568585.998,15.573)))
.ST_Append(SDO_GEOMETRY(3001,null,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY( 157512.499,6568585.998,15.573)),
t.IntValue).geom as geom
from table(TOOLS.generate_series(0,1,1)) t;
TEST GEOM
--------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Append Linestring 3002 and Point 3001 => 3004 SDO_GEOMETRY(3004,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1, 1,1,1),SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573,157512.499,6568585.998,15.573))
Concat Linestring 3002 and Point 3001 => 3002 SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(157503.148,6568556.703,50.647,157512.499,6568585.998,15.573))
Append Linestring 2002 and Point 2001 => 2004 SDO_GEOMETRY(2004,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,1,1,1), SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998,157512.499,6568585.998))
Concat Linestring 2002 and Point 2001 => 2002 SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1), SDO_ORDINATE_ARRAY(157503.148,6568556.703,157512.499,6568585.998))
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Area -- Returns area of underlying polygon sdo_geometry
SYNOPSIS
Member Function ST_Area (
p_unit in varchar2 default NULL,
p_round in integer default 0 )
)
Return Number Deterministic
ARGUMENTS
p_unit (varchar2) - Oracle Unit of Measure eg unit=M.
p_round (integer) - Whether to round result using PRECISION of T_GEOMETRY
DESCRIPTION
This function computes the area of underlying sdo_geometry polygon.
Result is expressed in the units of the SDO_SRID, or in p_units where supplied.
Result is rounded to SELF.PRECISION if p_round is true (1), otherwise false(0) no rounding.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry(3003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual union all
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',28356),0.0005,3,1) as tgeom From Dual
)
select a.tgeom.ST_Area(case when a.tGeom.ST_Srid() = 28356 then 'unit=SQ_KM' else null end,0) as area_km,
a.tgeom.ST_Area(case when a.tGeom.ST_Srid() = 28356 then 'unit=SQ_KM' else null end,1) as round_area_km
from data a;
AREA_KM ROUND_AREA_KM
----------- -------------
78.30229882 78.302
0.000399 0
RESULT
area (Number) -- Area in SRID unit of measure or in supplied units (p_unit) possibly rounded to SELF.Precision
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_AsEWKT -- Exports 3/4D mdsys.sdo_geometry object to an Extended Well Known Text (WKT) format.
SYNOPSIS
Member Function ST_AsEWKT(p_format_model in varchar2 default 'TM9')
Return Integer Deterministic,
DESCRIPTION
If underlying geometry is 2D, ST_AsWKT() is called.
If 3/4D this function creates an Extended WKT format result.
This function allows the formatting of the ordinates in the EWKT string to be user defined.
ARGUMENTS
p_format_model (varchar2) -- Oracle Number Format Model (see documentation)
default 'TM9')
RESULT
WKT (CLOB) -- Extended Well Known Text.
EXAMPLE
With data as (
select t_geometry(sdo_geometry(3001,NULL,sdo_point_type(100,100,-37.38),NULL,NULL),0.005,2,1) as geom
from dual union all
select t_geometry(sdo_geometry(4001,NULL,NULL,
sdo_elem_info_array(1,1,1),
sdo_ordinate_array(100,100,-37.38,345.24)),0.005,2,1) as geom
from dual union all
select t_geometry(sdo_geometry(2002,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)),0.0005,3,1) as geom
from dual union all
select t_geometry(sdo_geometry(2002,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.4743434348,5526918.37343433, 252400.034348,5526918.33434333473,252230.4434343378,5527000.433445660)),0.0005,3,1) as geom
from dual union all
select t_geometry(SDO_GEOMETRY(3302,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.478,5526918.373,0.0, 252400.08,5526918.373,417.4, 252230.478,5527000.0,506.88)),0.0005,3,1) as geom
from dual union all
select t_geometry(sdo_geometry(2002,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(100,100,900,900.0)),0.005,2,1) as geom
from dual union all
select t_geometry(sdo_geometry(3002,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as geom
from dual union all
select t_geometry(sdo_geometry(3302,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as geom
from dual union all
select t_geometry(sdo_geometry(4402,4283,null,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(147.5,-42.5,849.9,102.0, 147.6,-42.5,1923.0,2100.0)),0.005,2,0) as geom
from dual union all
Select T_GEOMETRY(sdo_geometry(3003,NULL,NULL,
sdo_elem_info_array(1,1003,1),
sdo_ordinate_array(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,2,1) as geom
From Dual
)
select a.geom.geom.sdo_gtype as gtype,
a.geom.ST_AsEWKT() as ewkt
from data a;
GTYPE EWKT
----- -----------------------------------------------------------------------------------------------------------------------
3001 POINTZ (100 100 -37.38)
4001 POINTZM (100 100 -37.38 345.24)
2002 CIRCULARSTRING (252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)
2002 CIRCULARSTRING (252230.4743434348 5526918.37343433, 252400.034348 5526918.334343335, 252230.4434343378 5527000.43344566)
3302 SRID=28355;CIRCULARSTRINGM (252230.478 5526918.373 0,252400.08 5526918.373 417.4,252230.478 5527000 506.88)
2002 LINESTRING (100.0 100.0, 900.0 900.0)
3002 LINESTRINGZ (0 0 1,10 0 2,10 5 3,10 10 4,5 10 5,5 5 6)
3302 LINESTRINGM (0 0 1,10 0 2,10 5 3,10 10 4,5 10 5,5 5 6)
4402 SRID=4283;LINESTRINGZM (147.5 -42.5 849.9 102,147.6 -42.5 1923 2100)
3003 POLYGONZ ((0 0 1,10 0 2,10 5 3,10 10 4,5 10 5,5 5 6))
9 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_AsGeometryRow -- Simply returned T_GEOMETRY as an T_GEOMETRYROW object.
SYNOPSIS
Member Function ST_AsGeometryRow (p_gid in integer default ),
Return &&INSTALL_SCHEMA..T_GEOMETRYROW Deterministic,
DESCRIPTION
T_GEOMETRIES is defined as a table of T_GEOMETRYROW.
Functions like ST_Dump break up an sdo_geometry and returns them as T_GEOMETRYROW objects within a T_GEOMETRIES object.
EXAMPLE
select &&INSTALL_SCHEMA..T_Geometry(SDO_GEOMETRY(2005, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(10.719, 8.644)),0.005,3,1)
.ST_AsGeometryRow() as geom
from dual;
GEOM
-------------------------------------------------------------------------------------------------------------------------------
T_GEOMETRY_ROW(1, SDO_GEOMETRY(2005, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(10.719, 8.644)), 0.005, 3, 1)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jul 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_AsText -- Exports mdsys.sdo_geometry object to its Well Known Text (WKT) representation by executing, and returning, result of mdsys.sdo_geometry method get_wkt().
SYNOPSIS
Member Function ST_AsText
Return Integer Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.GET_WKT().
Returns Well Known Text (WKT) representation of underlying mdsys.sdo_geometry.
RESULT
WKT (CLOB) -- eg Well Known Text encoding of mdsys.sdo_geometry object.
EXAMPLE
with data as (
select 'CircularString (1)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,2),sdo_ordinate_array (10,15,15,20,20,15)) as geom from dual union all
select 'CircularString (2)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,2),sdo_ordinate_array (10,35,15,40,20,35,25,30,30,35)) as geom from dual union all
select 'CircularString (Closed)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,2),sdo_ordinate_array (15,65,10,68,15,70,20,68,15,65)) as geom from dual union all
select 'CompoundCurve (1)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,4,3,1,2,1,3,2,2,7,2,1),sdo_ordinate_array (10,45,20,45,23,48,20,51,10,51)) as geom from dual union all
select 'CompoundCurve (2)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,4,2,1,2,1,7,2,2),sdo_ordinate_array (10,78,10,75,20,75,20,78,15,80,10,78)) as geom from dual union all
select 'CurvePolygon (Circle Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,4),sdo_ordinate_array (15,140,20,150,40,140)) as geom from dual union all
select 'CurvePolygon (CircularArc Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,2),sdo_ordinate_array (15,115,20,118,15,120,10,118,15,115)) as geom from dual union all
select 'CurvePolygon (Compound Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1005,2,1,2,1,7,2,2),sdo_ordinate_array (10,128,10,125,20,125,20,128,15,130,10,128)) as geom from dual union all
select 'GeometryCollection (1)' as test,sdo_geometry (2004,null,null,sdo_elem_info_array (1,1,1,3,2,1,7,1003,1),sdo_ordinate_array (10,5,10,10,20,10,10,105,15,105,20,110,10,110,10,105)) as geom from dual union all
select 'GeometryCollection (2)' as test,sdo_geometry(2004,NULL,NULL,sdo_elem_info_array(1,1003,3,5,1,1,9,2,1),sdo_ordinate_array(0,0,100,100,50,50,0,0,100,100.0)) as geom from dual union all
select 'LineString (1)' as test,sdo_geometry(2002,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,100,900,900.0)) as geom from dual union all
select 'LineString (2)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,25,20,30,25,25,30,30)) as geom from dual union all
select 'LineString (3)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,10,20,10)) as geom from dual union all
select 'LineString (Closed)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,55,15,55,20,60,10,60,10,55)) as geom from dual union all
select 'LineString (Self-Crossing)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,85,20,90,20,85,10,90,10,85)) as geom from dual union all
select 'MultiCurve (1)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,2,7,2,2),sdo_ordinate_array (50,35,55,40,60,35,65,35,70,30,75,35)) as geom from dual union all
select 'MultiCurve (Touching)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,2,7,2,2),sdo_ordinate_array (50,65,50,70,55,68,55,68,60,65,60,70)) as geom from dual union all
select 'MultiLine (Closed)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,1,9,2,1),sdo_ordinate_array (50,55,50,60,55,58,50,55,56,58,60,55,60,60,56,58)) as geom from dual union all
select 'MultiLine (Crossing)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,1,5,2,1),sdo_ordinate_array (50,22,60,22,55,20,55,25)) as geom from dual union all
select 'MultiLine (Stoked)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,1,5,2,1),sdo_ordinate_array (50,15,55,15,60,15,65,15)) as geom from dual union all
select 'MultiPoint (2)' as test,sdo_geometry(2005,NULL,NULL,sdo_elem_info_array(1,1,2),sdo_ordinate_array(100,100,900,900.0)) as geom from dual union all
select 'MultiPoint (3)' as test,sdo_geometry (2005,null,null,sdo_elem_info_array (1,1,1,3,1,1,5,1,1),sdo_ordinate_array (65,5,70,7,75,5)) as geom from dual union all
select 'MultiPoint (4)' as test,sdo_geometry (2005,null,null,sdo_elem_info_array (1,1,3),sdo_ordinate_array (50,5,55,7,60,5)) as geom from dual union all
select 'MultiPolygon (Disjoint)' as test,sdo_geometry (2007,null,null,sdo_elem_info_array (1,1003,1,11,1003,3),sdo_ordinate_array (50,105,55,105,60,110,50,110,50,105,62,108,65,112)) as geom from dual union all
select 'MultiPolygon (Rectangles)' as test,sdo_geometry(2007,NULL,NULL,sdo_elem_info_array(1,1003,3,5,1003,3),sdo_ordinate_array(1500,100,1900,500,1900,500,2300,900.0)) as geom from dual union all
select 'Point (Ordinate Encoding)' as test,sdo_geometry (2001,null,null,sdo_elem_info_array (1,1,1),sdo_ordinate_array (10,5)) as geom from dual union all
select 'Point (SDO_POINT encoding)' as test,sdo_geometry(2001,NULL,sdo_point_type(900,900,NULL),NULL,NULL) as geom from dual union all
select 'Polygon (No Holes)' as test,sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(100,100,500,500.0)) as geom from dual union all
select 'Polygon (Stroked Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,1),sdo_ordinate_array (10,105,15,105,20,110,10,110,10,105)) as geom from dual union all
select 'Polygon (With Point and a Hole)' as test,sdo_geometry(2003,NULL,MDSYS.SDO_POINT_TYPE(1000,1000,NULL),sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(500,500,1500,1500,600,750,900,1050.0)) as geom from dual union all
select 'Polygon (With Void)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,3,5,2003,3),sdo_ordinate_array (50,135,60,140,51,136,59,139)) as geom from dual union all
select 'Rectangle (Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,3),sdo_ordinate_array (10,135,20,140)) as geom from dual union all
select 'Rectangle (With Rectangular Hole)' as test,sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(0,0,200,200,75,25,125,75.0)) as geom from dual
)
select a.test,
T_GEOMETRY(a.geom,0.0005,3,1)
.ST_Rectangle2Polygon()
.ST_AsText() as geom
from data a
order by 1;
TEST GEOM
---------------------------------------- -----------------------------------------------------------------------------------------------------------------------------
CircularString (1) CIRCULARSTRING (10 15, 15 20, 20 15.0)
CircularString (2) CIRCULARSTRING (10 35, 15 40, 20 35, 25 30, 30 35.0)
CircularString (Closed) CIRCULARSTRING (15 65, 10 68, 15 70, 20 68, 15 65.0)
CompoundCurve (1) COMPOUNDCURVE ((10 45, 20 45.0), CIRCULARSTRING (20 45, 23 48, 20 51.0), (20 51, 10 51.0))
CompoundCurve (2) COMPOUNDCURVE ((10 78, 10 75, 20 75, 20 78.0), CIRCULARSTRING (20 78, 15 80, 10 78.0))
CurvePolygon (Circle Exterior Ring) CURVEPOLYGON ((15 140, 27.5 127.5, 40 140, 27.5 152.5, 15 140.0))
CurvePolygon (CircularArc Exterior Ring) CURVEPOLYGON (CIRCULARSTRING (15 115, 20 118, 15 120, 10 118, 15 115.0))
CurvePolygon (Compound Exterior Ring) CURVEPOLYGON (COMPOUNDCURVE ((10 128, 10 125, 20 125, 20 128.0), CIRCULARSTRING (20 128, 15 130, 10 128.0)))
GeometryCollection (1) GEOMETRYCOLLECTION (POINT (10 5.0), LINESTRING (10 10, 20 10.0), POLYGON ((10 105, 15 105, 20 110, 10 110, 10 105.0)))
GeometryCollection (2) GEOMETRYCOLLECTION (POLYGON ((0 0, 100 0, 100 100, 0 100, 0 0.0)), POINT (50 50.0), LINESTRING (100 100.0))
LineString (1) LINESTRING (100 100, 900 900.0)
LineString (2) LINESTRING (10 25, 20 30, 25 25, 30 30.0)
LineString (3) LINESTRING (10 10, 20 10.0)
LineString (Closed) LINESTRING (10 55, 15 55, 20 60, 10 60, 10 55.0)
LineString (Self-Crossing) LINESTRING (10 85, 20 90, 20 85, 10 90, 10 85.0)
MultiCurve (1) MULTICURVE (CIRCULARSTRING (50 35, 55 40, 60 35.0), CIRCULARSTRING (65 35, 70 30, 75 35.0))
MultiCurve (Touching) MULTICURVE (CIRCULARSTRING (50 65, 50 70, 55 68.0), CIRCULARSTRING (55 68, 60 65, 60 70.0))
MultiLine (Closed) MULTILINESTRING ((50 55, 50 60, 55 58, 50 55.0), (56 58, 60 55, 60 60, 56 58.0))
MultiLine (Crossing) MULTILINESTRING ((50 22, 60 22.0), (55 20, 55 25.0))
MultiLine (Stoked) MULTILINESTRING ((50 15, 55 15.0), (60 15, 65 15.0))
MultiPoint (2) MULTIPOINT ((100 100.0), (900 900.0))
MultiPoint (3) MULTIPOINT ((65 5.0), (70 7.0), (75 5.0))
MultiPoint (4) MULTIPOINT ((50 5.0), (55 7.0), (60 5.0))
MultiPolygon (Disjoint) MULTIPOLYGON (((50 105, 55 105, 60 110, 50 110, 50 105.0)), ((62 108, 65 108, 65 112, 62 112, 62 108.0)))
MultiPolygon (Rectangles) MULTIPOLYGON (((1500 100, 1900 100, 1900 500, 1500 500, 1500 100.0)), ((1900 500, 2300 500, 2300 900, 1900 900, 1900 500.0)))
Point (Ordinate Encoding) POINT (10 5.0)
Point (SDO_POINT encoding) POINT (900 900.0)
Polygon (No Holes) POLYGON ((100 100, 500 100, 500 500, 100 500, 100 100.0))
Polygon (Stroked Exterior Ring) POLYGON ((10 105, 15 105, 20 110, 10 110, 10 105.0))
Polygon (With Point and a Hole) POLYGON ((500 500, 1500 500, 1500 1500, 500 1500, 500 500.0), (900 750, 600 750, 600 1050, 900 1050, 900 750.0))
Polygon (With Void) POLYGON ((50 135, 60 135, 60 140, 50 140, 50 135.0), (59 136, 51 136, 51 139, 59 139, 59 136.0))
Rectangle (Exterior Ring) POLYGON ((10 135, 20 135, 20 140, 10 140, 10 135.0))
Rectangle (With Rectangular Hole) POLYGON ((0 0, 200 0, 200 200, 0 200, 0 0.0), (125 25, 75 25, 75 75, 125 75, 125 25.0))
33 rows selected
NOTES
Is an implementation of OGC ST_AsText method.
Any polygon containing optimized rectangles rings is converted to its 5 point equivalent.
Only supports 2D geometries.
TODO
Convert Optimized Rectangles to BBOX elements.
Create ST_AsEWKT() method and ST_FromEWKT() or use SC4O Java methods.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_AsTText -- Returns text Description of T_GEOMETRY
SYNOPSIS
Member Function ST_AsTText(p_linefeed in integer default 1,
p_format_model in varchar2 default 'TM9')
Return CLOB Deterministic,
DESCRIPTION
Returns textual description of T_GEOMETRY.
Rounds ordinates via object dPrecision variable.
ARGUMENTS
p_linefeed (integer) - 1 if apply linefeed to coordinates
p_format_model (varchar2) -- Oracle Number Format Model (see documentation)
default 'TM9')
RESULT
textual description (string)
EXAMPLE
with data as (
select 'POINT (0.1 0.2)' as wkt from dual union all
select 'LINESTRING (0.1 0.1,10 0,10 5,10 10,5 10,5 5)' as wkt from dual union all
select 'MULTILINESTRING ((50.0 55.0, 50.0 60.0, 55.0 58.0, 50.0 55.0), (56.0 58.0, 60.0 55.0, 60.0 60.0, 56.0 58.0))' as wkt from dual union all
select 'CIRCULARSTRING (10.0 15.0, 15.0 20.0, 20.0 15.0)' as wkt from dual union all
select 'COMPOUNDCURVE ((10.0 45.0, 20.0 45.0), CIRCULARSTRING (20.0 45.0, 23.0 48.0, 20.0 51.0), (20.0 51.0, 10.0 51.0))' as wkt from dual union all
select 'MULTICURVE (CIRCULARSTRING (50.0 35.0, 55.0 40.0, 60.0 35.0), CIRCULARSTRING (65.0 35.0, 70.0 30.0, 75.0 35.0))' as wkt from dual union all
select 'CURVEPOLYGON (COMPOUNDCURVE ((10.0 128.0, 10.0 125.0, 20.0 125.0, 20.0 128.0), CIRCULARSTRING (20.0 128.0, 15.0 130.0, 10.0 128.0)))' as wkt from dual union all
select 'MULTIPOLYGON (((1500.0 100.0, 1900.0 100.0, 1900.0 500.0, 1500.0 500.0, 1500.0 100.0)), ((1900.0 500.0, 2300.0 500.0, 2300.0 900.0, 1900.0 900.0, 1900.0 500.0)))' as wkt from dual union all
select 'GEOMETRYCOLLECTION (POINT (10.0 5.0), LINESTRING (10.0 10.0, 20.0 10.0), POLYGON ((10.0 105.0, 15.0 105.0, 20.0 110.0, 10.0 110.0, 10.0 105.0)))' as wkt from dual
)
select T_GEOMETRY.ST_FromText(a.wkt).ST_AsTText() as t_geom
from data a;
T_GEOM
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(0.1,0.2,NULL),NULL,NULL);TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.1,0.1,10.0,0.0,10.0,5.0,10.0,10.0,5.0,10.0,5.0,5.0));TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,9,2,1),SDO_ORDINATE_ARRAY(50.0,55.0,50.0,60.0,55.0,58.0,50.0,55.0,56.0,58.0,60.0,55.0,60.0,60.0,56.0,58.0));TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(10.0,15.0,15.0,20.0,20.0,15.0));TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,4,3,1,2,1,3,2,2,7,2,1),SDO_ORDINATE_ARRAY(10.0,45.0,20.0,45.0,23.0,48.0,20.0,51.0,10.0,51.0));TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2,7,2,2),SDO_ORDINATE_ARRAY(50.0,35.0,55.0,40.0,60.0,35.0,65.0,35.0,70.0,30.0,75.0,35.0));TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,7,2,2),SDO_ORDINATE_ARRAY(10.0,128.0,10.0,125.0,20.0,125.0,20.0,128.0,15.0,130.0,10.0,128.0));TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2007,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1,11,1003,1),SDO_ORDINATE_ARRAY(1500.0,100.0,1900.0,100.0,1900.0,500.0,1500.0,500.0,1500.0,100.0,1900.0,500.0,2300.0,500.0,2300.0,900.0,1900.0,900.0,1900.0,500.0));
TOLERANCE(.005),PRECISION(2),PROJECTED(1)
T_GEOMETRY(SDO_GEOMETRY(2004,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,1,3,2,1,7,1003,1),SDO_ORDINATE_ARRAY(10.0,5.0,10.0,10.0,20.0,10.0,10.0,105.0,15.0,105.0,20.0,110.0,10.0,110.0,10.0,105.0));
TOLERANCE(.005),PRECISION(2),PROJECTED(1)
9 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_AsWKB -- Exports mdsys.sdo_geometry object to its Well Known Binary (WKB) representation by executing, and returning, result of mdsys.sdo_geometry method get_wkb().
SYNOPSIS
Member Function ST_AsWKB
Return Integer Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.GET_WKB(). Returns Well Known Binary representation of underlying mdsys.sdo_geometry.
RESULT
WKB (BLOB) -- eg Well Known Binary encoding of mdsys.sdo_geometry object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_AsWKT -- Exports mdsys.sdo_geometry object to its Well Known Text (WKT) representation by executing, and returning, result of mdsys.sdo_geometry method get_wkt().
SYNOPSIS
Member Function ST_AsWKT
Return clob Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.GET_WKT().
Returns Well Known Text representation of underlying mdsys.sdo_geometry.
Only supports 2D geometries. See ST_AsEWKT for 3/4D.
RESULT
WKT (CLOB) -- eg Well Known Text encoding of mdsys.sdo_geometry object.
EXAMPLE
with data as (
select 'CircularString (1)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,2),sdo_ordinate_array (10,15,15,20,20,15)) as geom from dual union all
select 'CircularString (2)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,2),sdo_ordinate_array (10,35,15,40,20,35,25,30,30,35)) as geom from dual union all
select 'CircularString (Closed)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,2),sdo_ordinate_array (15,65,10,68,15,70,20,68,15,65)) as geom from dual union all
select 'CompoundCurve (1)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,4,3,1,2,1,3,2,2,7,2,1),sdo_ordinate_array (10,45,20,45,23,48,20,51,10,51)) as geom from dual union all
select 'CompoundCurve (2)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,4,2,1,2,1,7,2,2),sdo_ordinate_array (10,78,10,75,20,75,20,78,15,80,10,78)) as geom from dual union all
select 'CurvePolygon (Circle Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,4),sdo_ordinate_array (15,140,20,150,40,140)) as geom from dual union all
select 'CurvePolygon (CircularArc Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,2),sdo_ordinate_array (15,115,20,118,15,120,10,118,15,115)) as geom from dual union all
select 'CurvePolygon (Compound Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1005,2,1,2,1,7,2,2),sdo_ordinate_array (10,128,10,125,20,125,20,128,15,130,10,128)) as geom from dual union all
select 'GeometryCollection (1)' as test,sdo_geometry (2004,null,null,sdo_elem_info_array (1,1,1,3,2,1,7,1003,1),sdo_ordinate_array (10,5,10,10,20,10,10,105,15,105,20,110,10,110,10,105)) as geom from dual union all
select 'GeometryCollection (2)' as test,sdo_geometry(2004,NULL,NULL,sdo_elem_info_array(1,1003,3,5,1,1,9,2,1),sdo_ordinate_array(0,0,100,100,50,50,0,0,100,100.0)) as geom from dual union all
select 'LineString (1)' as test,sdo_geometry(2002,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,100,900,900.0)) as geom from dual union all
select 'LineString (2)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,25,20,30,25,25,30,30)) as geom from dual union all
select 'LineString (3)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,10,20,10)) as geom from dual union all
select 'LineString (Closed)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,55,15,55,20,60,10,60,10,55)) as geom from dual union all
select 'LineString (Self-Crossing)' as test,sdo_geometry (2002,null,null,sdo_elem_info_array (1,2,1),sdo_ordinate_array (10,85,20,90,20,85,10,90,10,85)) as geom from dual union all
select 'MultiCurve (1)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,2,7,2,2),sdo_ordinate_array (50,35,55,40,60,35,65,35,70,30,75,35)) as geom from dual union all
select 'MultiCurve (Touching)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,2,7,2,2),sdo_ordinate_array (50,65,50,70,55,68,55,68,60,65,60,70)) as geom from dual union all
select 'MultiLine (Closed)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,1,9,2,1),sdo_ordinate_array (50,55,50,60,55,58,50,55,56,58,60,55,60,60,56,58)) as geom from dual union all
select 'MultiLine (Crossing)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,1,5,2,1),sdo_ordinate_array (50,22,60,22,55,20,55,25)) as geom from dual union all
select 'MultiLine (Stoked)' as test,sdo_geometry (2006,null,null,sdo_elem_info_array (1,2,1,5,2,1),sdo_ordinate_array (50,15,55,15,60,15,65,15)) as geom from dual union all
select 'MultiPoint (2)' as test,sdo_geometry(2005,NULL,NULL,sdo_elem_info_array(1,1,2),sdo_ordinate_array(100,100,900,900.0)) as geom from dual union all
select 'MultiPoint (3)' as test,sdo_geometry (2005,null,null,sdo_elem_info_array (1,1,1,3,1,1,5,1,1),sdo_ordinate_array (65,5,70,7,75,5)) as geom from dual union all
select 'MultiPoint (4)' as test,sdo_geometry (2005,null,null,sdo_elem_info_array (1,1,3),sdo_ordinate_array (50,5,55,7,60,5)) as geom from dual union all
select 'MultiPolygon (Disjoint)' as test,sdo_geometry (2007,null,null,sdo_elem_info_array (1,1003,1,11,1003,3),sdo_ordinate_array (50,105,55,105,60,110,50,110,50,105,62,108,65,112)) as geom from dual union all
select 'MultiPolygon (Rectangles)' as test,sdo_geometry(2007,NULL,NULL,sdo_elem_info_array(1,1003,3,5,1003,3),sdo_ordinate_array(1500,100,1900,500,1900,500,2300,900.0)) as geom from dual union all
select 'Point (Ordinate Encoding)' as test,sdo_geometry (2001,null,null,sdo_elem_info_array (1,1,1),sdo_ordinate_array (10,5)) as geom from dual union all
select 'Point (SDO_POINT encoding)' as test,sdo_geometry(2001,NULL,sdo_point_type(900,900,NULL),NULL,NULL) as geom from dual union all
select 'Polygon (No Holes)' as test,sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(100,100,500,500.0)) as geom from dual union all
select 'Polygon (Stroked Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,1),sdo_ordinate_array (10,105,15,105,20,110,10,110,10,105)) as geom from dual union all
select 'Polygon (With Point and a Hole)' as test,sdo_geometry(2003,NULL,MDSYS.SDO_POINT_TYPE(1000,1000,NULL),sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(500,500,1500,1500,600,750,900,1050.0)) as geom from dual union all
select 'Polygon (With Void)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,3,5,2003,3),sdo_ordinate_array (50,135,60,140,51,136,59,139)) as geom from dual union all
select 'Rectangle (Exterior Ring)' as test,sdo_geometry (2003,null,null,sdo_elem_info_array (1,1003,3),sdo_ordinate_array (10,135,20,140)) as geom from dual union all
select 'Rectangle (With Rectangular Hole)' as test,sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(0,0,200,200,75,25,125,75.0)) as geom from dual
)
select a.test,
T_GEOMETRY(a.geom,0.0005,3,1)
.ST_Rectangle2Polygon()
.ST_AsEWKT() as geom
from data a
order by 1;
TEST GEOM
---------------------------------------- -----------------------------------------------------------------------------------------------------------------------------
CircularString (1) CIRCULARSTRING (10 15, 15 20, 20 15.0)
CircularString (2) CIRCULARSTRING (10 35, 15 40, 20 35, 25 30, 30 35.0)
CircularString (Closed) CIRCULARSTRING (15 65, 10 68, 15 70, 20 68, 15 65.0)
CompoundCurve (1) COMPOUNDCURVE ((10 45, 20 45.0), CIRCULARSTRING (20 45, 23 48, 20 51.0), (20 51, 10 51.0))
CompoundCurve (2) COMPOUNDCURVE ((10 78, 10 75, 20 75, 20 78.0), CIRCULARSTRING (20 78, 15 80, 10 78.0))
CurvePolygon (Circle Exterior Ring) CURVEPOLYGON ((15 140, 27.5 127.5, 40 140, 27.5 152.5, 15 140.0))
CurvePolygon (CircularArc Exterior Ring) CURVEPOLYGON (CIRCULARSTRING (15 115, 20 118, 15 120, 10 118, 15 115.0))
CurvePolygon (Compound Exterior Ring) CURVEPOLYGON (COMPOUNDCURVE ((10 128, 10 125, 20 125, 20 128.0), CIRCULARSTRING (20 128, 15 130, 10 128.0)))
GeometryCollection (1) GEOMETRYCOLLECTION (POINT (10 5.0), LINESTRING (10 10, 20 10.0), POLYGON ((10 105, 15 105, 20 110, 10 110, 10 105.0)))
GeometryCollection (2) GEOMETRYCOLLECTION (POLYGON ((0 0, 100 0, 100 100, 0 100, 0 0.0)), POINT (50 50.0), LINESTRING (100 100.0))
LineString (1) LINESTRING (100 100, 900 900.0)
LineString (2) LINESTRING (10 25, 20 30, 25 25, 30 30.0)
LineString (3) LINESTRING (10 10, 20 10.0)
LineString (Closed) LINESTRING (10 55, 15 55, 20 60, 10 60, 10 55.0)
LineString (Self-Crossing) LINESTRING (10 85, 20 90, 20 85, 10 90, 10 85.0)
MultiCurve (1) MULTICURVE (CIRCULARSTRING (50 35, 55 40, 60 35.0), CIRCULARSTRING (65 35, 70 30, 75 35.0))
MultiCurve (Touching) MULTICURVE (CIRCULARSTRING (50 65, 50 70, 55 68.0), CIRCULARSTRING (55 68, 60 65, 60 70.0))
MultiLine (Closed) MULTILINESTRING ((50 55, 50 60, 55 58, 50 55.0), (56 58, 60 55, 60 60, 56 58.0))
MultiLine (Crossing) MULTILINESTRING ((50 22, 60 22.0), (55 20, 55 25.0))
MultiLine (Stoked) MULTILINESTRING ((50 15, 55 15.0), (60 15, 65 15.0))
MultiPoint (2) MULTIPOINT ((100 100.0), (900 900.0))
MultiPoint (3) MULTIPOINT ((65 5.0), (70 7.0), (75 5.0))
MultiPoint (4) MULTIPOINT ((50 5.0), (55 7.0), (60 5.0))
MultiPolygon (Disjoint) MULTIPOLYGON (((50 105, 55 105, 60 110, 50 110, 50 105.0)), ((62 108, 65 108, 65 112, 62 112, 62 108.0)))
MultiPolygon (Rectangles) MULTIPOLYGON (((1500 100, 1900 100, 1900 500, 1500 500, 1500 100.0)), ((1900 500, 2300 500, 2300 900, 1900 900, 1900 500.0)))
Point (Ordinate Encoding) POINT (10 5.0)
Point (SDO_POINT encoding) POINT (900 900.0)
Polygon (No Holes) POLYGON ((100 100, 500 100, 500 500, 100 500, 100 100.0))
Polygon (Stroked Exterior Ring) POLYGON ((10 105, 15 105, 20 110, 10 110, 10 105.0))
Polygon (With Point and a Hole) POLYGON ((500 500, 1500 500, 1500 1500, 500 1500, 500 500.0), (900 750, 600 750, 600 1050, 900 1050, 900 750.0))
Polygon (With Void) POLYGON ((50 135, 60 135, 60 140, 50 140, 50 135.0), (59 136, 51 136, 51 139, 59 139, 59 136.0))
Rectangle (Exterior Ring) POLYGON ((10 135, 20 135, 20 140, 10 140, 10 135.0))
Rectangle (With Rectangular Hole) POLYGON ((0 0, 200 0, 200 200, 0 200, 0 0.0), (125 25, 75 25, 75 75, 125 75, 125 25.0))
33 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Boundary -- Returns All Outer Rings of a polygon or multipolygon as a single linestring/multilinestring.
SYNOPSIS
Member Function ST_Boundary()
Return T_GEOMETRY Deterministic,
DESCRIPTION
This function extracts all the exterior (outer) rings of a polygon/multipolygon and returns them in a T_GEOMETRY object as a linestring.
NOTES
Is an implementation of OGC ST_Boundary method.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_Boundary().ST_AsText() as Boundary
from data a;
BOUNDARY
----------------------------------------------------------------------------------------------
MULTILINESTRING ((0 0, 20 0, 20 20, 0 20, 0 0), (100 100, 200 100, 200 200, 100 200, 100 100))
RESULT
Exterior ring(s) (T_GEOMETRY) -- For example, if a single Polygon with 1 exterior and 1 interior ring is provided, then a single polygon with a single exterior ring is returned.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Buffer -- Creates a buffer around input geometry.
SYNOPSIS
Member Function ST_Buffer(p_distance in number,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function creates a square buffer around all linestrings in an object.
A negative buffer is not possible.
ARGUMENTS
p_distance (Number) - Value > 0.0
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
polygon (T_GEOMETRY) - Result of buffering input geometry.
NOTES
Uses MDSYS.SDO_GEOM.SDO_BUFFER if Oracle database version is 12c or above,
or if the customer is licensed for the Spatial object before 12c.
ERRORS
Will throw exception if the user is not licensed to call MDSYS.SDO_GEOM.SDO_BUFFER.
-20102 MDSYS.SDO_GEOM.SDO_BUFFER only supported for Locator users from 12c onwards.';
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Centroid_A -- Creates a centroid for a polygon mdsys.sdo_geometry object.
SYNOPSIS
Member Function ST_Centroid_A(
P_method In Integer Default 1,
P_Seed_Value In Number Default Null,
p_loops in integer Default 10)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function creates a single centroid if a single polygon.
The position of the centroid is computed in the longest segment defined by a constant X or Y ordinate.
There are a number of options for computing a centroid controlled by p_method; these are described
in the ARGUMENTS section of this document.
ARGUMENTS
p_method (integer) -- 0 = Use average of all Area's X Ordinates for starting centroid Calculation
10 = Use average of all Area's Y Ordinates for starting centroid Calculation
1 = Use centre X Ordinate of geometry MBR
11 = Use centre Y Ordinate of geometry MBR
2 = User supplied starting seed X ordinate value
12 = User supplied starting seed Y ordinate value
3 = Use MDSYS.SDO_GEOM.SDO_CENTROID function
4 = Use MDSYS.SDO_GEOM.SDO_POINTONSURFACE function.
p_seed_value (number) -- Starting ordinate X/Y for which a Y/X that is inside the polygon is returned.
p_loops (integer) -- In the rare case that the first pass calculation of a centroid fails (not p_method 3 or 4)
if p_loops is > 0 then the p_seed_value is adjusted by SELF.tolerance and another attempt it made.
When the number of loops is exhausted NULL is returned (very rare).
RESULT
point (T_GEOMETRY) - Centroid of input object.
EXAMPLE
-- Process ALL options in one.
With data as (
select T_GEOMETRY(
sdo_geometry(
'POLYGON((2300 -700, 2800 -300, 2300 700, 2800 1100, 2300 1100,
1800 1100, 2300 800, 2000 600, 2300 600, 2300 500, 2400 400,
2300 400, 2300 300, 2300 200, 2500 150, 2100 100, 2500 100,
2300 -200, 1800 -300, 2300 -500, 2200 -400, 2400 -400, 2300 -700),
(2300 1000, 2400 900, 2200 900, 2300 1000),
(2400 -400, 2450 -300, 2550 -400, 2400 -400),
(2300 1000, 2400 1050, 2400 1000, 2300 1000))',null),
0.005,2,1) as tgeom
from dual
)
select t.IntValue as method_id,
case t.IntValue
when 0 then 'Avg of Area''s X Ordinates as Centroid Seed'
when 10 then 'Avg of Area''s Y Ordinates as Centroid Seed'
when 1 then 'Centre X Ordinate of geom MBR as seed'
when 11 then 'Centre Y Ordinate of geom MBR as seed'
when 2 then 'User X ordinate'
when 12 then 'User Y ordinate'
when 3 then 'MDSYS.SDO_GEOM.SDO_CENTROID'
when 4 then 'MDSYS.SDO_GEOM.SDO_PointOnSurface'
end as Method_Text,
a.tGeom.ST_Centroid_A(
p_method => t.IntValue,
P_Seed_Value => case t.IntValue when 2 then X eg 2035.4 when 12 then Y eg 284.6 else NULL end,
p_loops => 5
).ST_AsText() as centroid
from data a,
table(TOOLS.generate_series(0,12,1)) t
where t.IntValue in (0, 1, 2, 3, 4, 10, 11, 12)
order by 2 asc;
METHOD_ID METHOD_TEXT CENTROID
---------- ------------------------------------------ --------------------------------------------------------------------------------
0 Avg of Area's X Ordinates as Centroid Seed POINT (2322.86 -282.855)
10 Avg of Area's Y Ordinates as Centroid Seed POINT (2396.43 314.29)
1 Centre X Ordinate of geom MBR as seed POINT (2300.0 -300.0)
11 Centre Y Ordinate of geom MBR as seed POINT (2425.0 200.0)
3 MDSYS.SDO_GEOM.SDO_CENTROID POINT (2377.12121212121 234.772727272727)
4 MDSYS.SDO_GEOM.SDO_PointOnSurface POINT (2300.0 -700.0)
2 User X ordinate POINT (2035.4 -323.54)
12 User Y ordinate POINT (2403.85 284.6)
8 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2006 - Original coding.
Simon Greener - January 2012 - Added p_seed_x support.
Simon Greener - August 2018 - Added to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Centroid_L -- Creates a centroid for a linestring mdsys.sdo_geometry object.
SYNOPSIS
Member Function ST_Centroid_L(p_option in varchar2 := 'LARGEST',
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function creates a single centroid if the line-string being operated on
has a single part. The position of the centroid is either the mid-length point
if the line is not measured, or the mid-measure position if measured. For a single
line-string any supplied p_option value is ignored.
If the geometry is a multi-linestring a number of options are available.
- LARGEST -- Returns centroid of largest (measure/length) line-string in multi-linestring (DEFAULT)
- SMALLEST -- Returns centroid of smallest (measure/length) line-string in multi-linestring
- MULTI -- Returns all centroid for all parts of multi-linestring as a single multi-point (x005 gtype) geometry.
The centroid of each part is constructed using the same rules as for a single line-string.
ARGUMENTS
p_option (VarChar2) - LARGEST, SMALLEST, or MULTI. Ignored if single linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
point (T_GEOMETRY) - Centroid of input object.
EXAMPLE
-- Largest
-- Smallest
-- Multi
AUTHOR
Simon Greener
Simon Greener - January 2006 - Original coding.
Simon Greener - January 2012 - Added p_seed_x support.
Simon Greener - August 2018 - Added to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Centroid_P -- Creates a centroid for a multipoint object.
SYNOPSIS
Member Function ST_Centroid_P
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function creates a single centroid from the underlying MultiPoint geometry.
If the underlying geometry is a point, it is returned.
If the underlying geometry is not a point or multipoint an exception is thrown.
The centroid is returned with the XY ordinates rounded to SELF.dPrecision.
Measured (4x05) objects are not supported.
RESULT
point (T_GEOMETRY) - Centroid of input object.
EXAMPLE
-- Single point is returned as it is.
select T_Geometry(sdo_geometry('POINT(45 45)',null),0.005,2,1)
.ST_Centroid_P()
.ST_AsText() as cPoint
from dual;
CPOINT
--------------------------------------------------------------------------------
POINT (45.0 45.0)
-- Points around 0,0, which should return 0.0!
select T_Geometry(sdo_geometry('MULTIPOINT((45 45),(-45 45),(-45 -45),(45 -45))',null),0.005,2,1)
.ST_Centroid_P()
.ST_AsText() as cPoint
from dual;
CPOINT
---------------
POINT (0.0 0.0)
-- 3D MultiPoint
select T_Geometry(
mdsys.sdo_geometry(3005,null,null,mdsys.sdo_elem_info_array(1,1,3),mdsys.sdo_ordinate_array(1.1,2.0,-0.8, 3.3,4.2,-0.95, 5.5,6.8,1.04)),
0.005,2,1)
.ST_Centroid_P()
.ST_Round(2,2,3)
.geom as cPoint
from dual;
CPOINT
----------------------------------------------------------------
SDO_GEOMETRY(3001,NULLSDO_POINT_TYPE(3.3,4.33,-0.237),NULL,NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2006 - Original coding.
Simon Greener - January 2012 - Added p_seed_x support.
Simon Greener - August 2018 - Added to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Cogo2Line - Creates linestring from supplied bearing and distance instructions.
SYNOPSIS
Member Function ST_Cogo2Line(p_bearings_and_distances in &&INSTALL_SCHEMA..T_BEARING_DISTANCES)
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
This function takes a set of bearings and distances supplied using array of t_bearing_and_distance instructions, and creates a linestring from it.
The underlying geometry must be a single start point.
The final geometry's XY ordinates are not rounded.
ARGUMENTS
p_bearings_and_distances (t_bearings_distances) - Array of T_BEARING_DISTANCE instructions.
RESULT
linestring (t_geometry) - New linestring geometry object.
NOTE
Measures not supported: see LRS functions.
TODO
Create Static version where all instructions are provided including start point.
EXAMPLE
-- Build 2D Line from default constructor
select F.line.ST_Validate() as vLine,
f.line.geom as line,
round(f.line.ST_Length(),2) as meters
from (select t_geometry(sdo_geometry(2001,null,sdo_point_type(0.0,3.5,null),null,null),0.005,2,1)
.ST_Cogo2Line (
t_bearing_distances(
t_bearing_distance(180.00,3.50,null),
t_bearing_distance( 90.00,3.50,null),
t_bearing_distance( 0.00,3.50,null),
t_bearing_distance( 43.02,5.43,null),
t_bearing_distance(270.00,9.50,null)
)
)
.ST_Round(8,8) as line
from dual
) f;
VLINE LINE METERS
----- ----------------------------------------------------------------------------------------------------------------------------------------------------------- ------
TRUE SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.0,3.5, 0.0,0.0, 3.5,0.0, 3.5,3.5, 7.2046371,7.46995768, -2.2953629,7.46995768)) 25.43
-- Build 3D line by decimal degrees using default constructor
select F.line.ST_Validate() as vLine,
f.line.geom as line,
round(f.line.ST_Length(),2) as meters
from (select T_Geometry(sdo_geometry(3001,null,sdo_point_type(0,3.5,0),null,null),0.005,2,1)
.ST_Cogo2Line(
p_bearings_and_distances=>
t_bearing_distances(
t_bearing_distance(180, 3.5, 0.1),
t_bearing_distance(90, 3.5, 0.5),
t_bearing_distance(0, 3.5, 1.6),
t_bearing_distance(43.02,5.43,2.123),
t_bearing_distance(270, 9.5, 0.5)
)
)
.ST_Round(8,8) as line
from dual
) f;
VLINE LINE METERS
----- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------
TRUE SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.0,3.5,0.0, 0.0,0.0,0.1, 3.5,0.0,0.5, 3.5,3.5,1.6, 7.2046371,7.46995768,2.123, -2.2953629,7.46995768,0.5)) 25.79
-- Line by degrees using text constructor
select F.line.ST_Validate() as vLine,
f.line.geom as line,
round(f.line.ST_Length(),2) as meters
from (select T_Geometry(sdo_geometry(3001,null,sdo_point_type(0,3.5,0),null,null),0.005,2,1)
.ST_Cogo2Line(
p_bearings_and_distances=>
t_bearing_distances(
t_bearing_distance(p_sDegMinSec=>'180', p_distance=>3.5, p_z=>0.1),
t_bearing_distance(p_sDegMinSec=>'90', p_distance=>3.5, p_z=>0.5),
t_bearing_distance(p_sDegMinSec=>'0', p_distance=>3.5, p_z=>1.6),
t_bearing_distance(p_sDegMinSec=>'43^01''21"', p_distance=>5.43, p_z=>2.0),
t_bearing_distance(p_sDegMinSec=>'270', p_distance=>9.5, p_z=>0.5),
t_bearing_distance(p_sDegMinSec=>'149^58''6.3"',p_distance=>4.613,p_z=>0.1))
)
.ST_Round(8,8) as line
from dual
) f;
VLINE LINE METERS
----- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------
TRUE SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.0,3.5,0.0, 0.0,0.0,0.1, 3.5,0.0,0.5, 3.5,3.5,1.6, 7.20481032,7.46979603,2.0, -2.29518968,7.46979603,0.5, 0.01351213,3.47609287,0.1)) 30.39
-- Build 3D line using mixed constructors
select F.line.ST_Validate() as vLine,
f.line.geom as line,
round(f.line.ST_Length(),2) as Meters
from (select T_Geometry(sdo_geometry(3001,null,sdo_point_type(0,3.5,0),null,null),0.005,2,1)
.ST_Cogo2Line(
p_bearings_and_distances=>
t_bearing_distances(
t_bearing_distance( 180.0, 3.5, 0.1), -- << Default Constructor
t_bearing_distance(p_sDegMinSec=>'90', p_distance=>3.5, p_z=>0.5),
t_bearing_distance( 0.0, 3.5, 1.6), -- << Default Constructor
t_bearing_distance(p_sDegMinSec=>'43^01''21"', p_distance=>5.43, p_z=>2.0),
t_bearing_distance(p_sDegMinSec=>'270', p_distance=>9.5, p_z=>0.5),
t_bearing_distance(p_sDegMinSec=>'149^58''6.3"',p_distance=>4.613,p_z=>0.1))
)
.ST_Round(8,8) as line
from dual
) f;
VLINE LINE METERS
----- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------
TRUE SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.0,3.5,0.0, 0.0,0.0,0.1, 3.5,0.0,0.5, 3.5,3.5,1.6, 7.20481032,7.46979603,2.0, -2.29518968,7.46979603,0.5, 0.01351213,3.47609287,0.1)) 30.39
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Cogo2Polygon - Creates single polygon exterior ring from supplied bearing and distance instructions.
SYNOPSIS
Member Function ST_Cogo2Polygon(p_bearings_and_distances in &&INSTALL_SCHEMA..T_BEARING_DISTANCES)
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
This function takes a set of bearings and distances supplied using array of t_bearing_and_distance instructions, and creates a closed exterior ring from it.
The underlying geometry must be a single start point.
The final geometry will have its XY ordinates rounded to SELF.dPrecision.
Z ordinates are not rounded as they are provided (as is) in the t_bearing_distance.z values.
ARGUMENTS
p_bearings_and_distances (t_bearings_distances) - Array of T_BEARING_DISTANCE instructions.
RESULT
polygon (t_geometry) - New polygon object with a single exterior ring.
NOTE
Measured polygons not supported.
TODO
Create Static version where all instructions are provided including start point.
EXAMPLE
-- Polygon built from default constructor...
select F.poly.ST_Validate() as vPoly,
f.poly.ST_AsText() as pWKT,
round(f.Poly.ST_Area(),2) as sqM
from (select t_geometry(sdo_geometry(2001,null,sdo_point_type(0,3.5,null),null,null),0.005,2,1)
.ST_Cogo2Polygon(
t_bearing_distances(
t_bearing_distance(180,3.5,null),
t_bearing_distance(90,3.5,null),
t_bearing_distance(0,3.5,null),
t_bearing_distance(43.02,5.43,null),
t_bearing_distance(270,9.5,null))
)
.ST_Round(3,3) as poly
from dual
) f;
VPOLY PWKT SQM
----- -------------------------------------------------------------------------------- -----
TRUE POLYGON ((0.0 3.5, 0.0 0.0, 3.5 0.0, 3.5 3.5, 7.205 7.47, -2.295 7.47, 0.0 3.5)) 38.06
-- Different way of building directions.
-- Simple bearing/distance constructors used
With data as (
select CAST(MULTISET(
Select bd
from (select 1 as rin, t_bearing_distance(180.0,3.5) as bd from dual union all
select 2, t_bearing_distance( 90.0,3.5) from dual union all
select 3, t_bearing_distance( 0.0,3.5) from dual union all
select 4, t_bearing_distance(43.02,round(sqrt(4.5*4.5+2.2*4.2),2)) from dual union all
select 5, t_bearing_distance(270.0,(4.5+3.4+1.6)) from dual )
order by rin
) as t_bearing_distances ) as directions
from dual
)
select F.poly.ST_Validate() as vPoly,
f.poly.ST_AsText() as pWKT,
round(f.Poly.ST_Area(),2) as sqM
from (select t_geometry(sdo_geometry(2001,null,sdo_point_type(0,3.5,null),null,null),0.005,2,1)
.ST_Cogo2Polygon (
p_bearings_and_distances=>a.directions
)
.ST_Round(3,3) as poly
from data a
) f;
VPOLY PWKT SQM
----- -------------------------------------------------------------------------------- -----
TRUE POLYGON ((0.0 3.5, 0.0 0.0, 3.5 0.0, 3.5 3.5, 7.205 7.47, -2.295 7.47, 0.0 3.5)) 38.06
-- Mixed Constructors with Z for 3D Polygon...
select F.poly.ST_Validate() as vPoly,
f.poly.geom as polygon,
round(f.Poly.ST_Area(),2) as sqM
from (select t_geometry(sdo_geometry(3001,null,sdo_point_type(0,3.5,10.0),null,null),0.005,2,1)
.ST_Cogo2Polygon (
t_bearing_distances(
t_bearing_distance(180,3.5,11.1),
t_bearing_distance(p_sDegMinSec=>'90^0''0"',p_distance=>3.5,p_z=>12.2),
t_bearing_distance(0.0,3.5,13.3),
t_bearing_distance(p_sDegMinSec=>'43^01''12"',p_distance=>5.43,p_z=>14.4),
t_bearing_distance(270.0,9.5,13.3)
)
)
.ST_Round(3,3) as poly
from dual
) f;
VPOLY POLYGON SQM
----- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -----
TRUE SDO_GEOMETRY(3003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SDO_ORDINATE_ARRAY(0.0,3.5,10.0, 0.0,0.0,11.1, 3.5,0.0,12.2, 3.5,3.5,13.3, 7.205,7.47,14.4, -2.295,7.47,13.3, 0.0,3.5,10.0)) 43.37
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Compress - Turns coordinate array of linestring/polygon into equivalent to MoveTo and LineTo components.
SYNOPSIS
Member Function ST_Decompress(p_delta_factor in number default 1,
p_origin in &&INSTALL_SCHEMA..T_Vertex default null )
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
Starting point as abolute value is kept if p_origin is null.
p_origin could contain lower left ordinate of the MBR of the geometry.
Extracts pairs of adjacent vertices, substracts their ordinates and applies delta factor.
p_delta_factor is scalar applied to difference between two vertices in a linestring.
EG:
* 1.0 leaves delta XY alone
* 0.5 divides each delta x and y by 2
* 0.1 divides each delta x and y by 10
No rounding occurs as full precision is needed for ST_Decompress.
ARGUMENTS
p_delta_factor (number) -- Coordinate delta multiplying factor.
p_origin (t_vertex) -- Contains starting point for decompressing geometry cf MoveTo in SVG.
RESULT
Compressed Linestring (t_geometry) - New polygon/linestring object with coordinates compressed.
EXAMPLE
-- ST_Compress
With data As (
select 0.1 as delta_factor,
t_geometry(Sdo_Geometry(2002,2154,Null,
Sdo_Elem_Info_Array(1,2,1),
Sdo_Ordinate_Array(210124.235,6860562.134, 189291.0,6855606.0, 185644.0,6870204.0, 130465.0,6856274.0, 124851.0,6831829.0, 162802.0,6840716.0, 148600.0,6829212.0, 162326.0,6831137.0)),
0.005,2,1) as original,
t_vertex(
p_x=>210124.235,
p_y=>6860562.134,
p_id=>0,
p_sdo_gtype=>2001,
p_sdo_srid=>2154
) as origin
from dual
)
Select DBMS_LOB.GetLength(f.original.ST_AsText() ) as originalSize,
DBMS_LOB.GetLength(f.compressed.ST_AsText()) as compressedSize,
f.compressed.ST_AsText() as compressed
From (Select a.original
.ST_Compress(
p_delta_factor => a.delta_factor,
P_origin => a.origin
) As compressed,
a.original,
a.delta_factor,
a.origin
From data a
) f;
ORIGINALSIZE COMPRESSEDSIZE COMPRESSED
------------ -------------- ---------------------------------------------------------------------------------------------------------------------------------------
175 135 LINESTRING (0.0 0.0, -2083.3235 -495.6134, -364.7 1459.8, -5517.9 -1393.0, -561.4 -2444.5, 3795.1 888.7, -1420.2 -1150.4, 1372.6 192.5)
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Concat_Line -- Adds supplied linestring to start/end of underlying linestring depending on geometric relationship.
DESCRIPTION
Joins two linestrings together depending on start/end relationships of the supplied linestring and the underlying linestring. Does not support point or polygon geometries.
ARGUMENTS
p_line (SDO_GEOMETRY) - Geometry to be added to underlying mdsys.sdo_geometry.
RESULT
linestring (T_GEOMETRY) - Line that is the result of concatenating the two linestrings.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_CoordDimension -- Returns Coordinate Dimension of mdsys.sdo_geometry object.
SYNOPSIS
Member Function ST_CoordDimension
Return Integer Deterministic,
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('POINT(0 0)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3001,NULL,SDO_POINT_TYPE(0,0,0),null,null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('MULTILINESTRING((-1 -1, 0 -1),(0 0,10 0,10 5,10 10,5 10,5 5))',null),0.005,3,1) as tgeom From Dual union all
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GeometryType() as geomType,
a.tGeom.ST_GType() as sdo_gtype,
a.tGeom.ST_CoordDimension() as coordDim,
a.tgeom.ST_Dimension() as geomDim
from data a;
GEOMTYPE SDO_GTYPE COORDDIM GEOMDIM
------------------- ---------- ---------- ----------
ST_POINT 1 2 0
ST_POINT 1 3 0
ST_LINESTRING 2 2 1
ST_LINESTRING 2 3 1
ST_MULTILINESTRING 6 2 1
ST_POLYGON 3 2 2
ST_MULTIPOLYGON 7 2 2
7 rows selected
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.ST_CoordDimen().
Returns Coordinate Dimension of mdsys.sdo_geometry object.
RESULT
Coordinate Dimension (SMALLINT) -- 2 if 2001; 3 is 3001 etc.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Decompress - Reverse Compress applied by ST_Compress with same p_factor_applied and p_origin.
SYNOPSIS
Member Function ST_Decompress(p_delta_factor in number default 1)
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
Starting point as abolute value is kept if p_origin is null.
p_origin could contain lower left ordinate of the MBR of the geometry.
Extracts pairs of adjacent vertex deltas, applies inverse delta factor to each, and creates new point.
p_delta_factor is scalar applied to difference between two vertices in a linestring.
Must be same p_delta_factor applied to original ST_Compress:
* 1.0 leaves delta XY alone
* 0.5 divides each delta x and y by 2
* 0.1 divides each delta x and y by 10
ARGUMENTS
p_delta_factor (number) -- Coordinate delta multiplying factor.
p_origin (t_vertex) -- Contains starting point for decompressing geometry cf MoveTo in SVG.
RESULT
Decompressed Linestring (t_geometry) - New polygon/linestring object with coordinates compressed.
EXAMPLE
-- ST_Decompress
With data As (
select 0.1 as delta_factor,
t_geometry(Sdo_Geometry(2002,2154,Null,
Sdo_Elem_Info_Array(1,2,1),
Sdo_Ordinate_Array(210124.235,6860562.134, 189291.0,6855606.0, 185644.0,6870204.0, 130465.0,6856274.0, 124851.0,6831829.0, 162802.0,6840716.0, 148600.0,6829212.0, 162326.0,6831137.0)),
0.005,2,1) as original,
t_vertex(
p_x=>210124.235,
p_y=>6860562.134,
p_id=>0,
p_sdo_gtype=>2001,
p_sdo_srid=>2154
) as origin
from dual
)
Select DBMS_LOB.GetLength(f.original.ST_AsText() ) as originalSize,
DBMS_LOB.GetLength(f.compressed.ST_AsText()) as compressedSize,
f.compressed
.ST_Decompress(
p_delta_factor => f.delta_factor,
P_origin => f.origin
).ST_Equals(
p_geometry => f.original.geom,
p_z_precision => null,
p_m_precision => null
) as before_after_equals,
f.compressed.ST_AsText() as compressed
From (Select a.original
.ST_Compress(
p_delta_factor => a.delta_factor,
P_origin => a.origin
) As compressed,
a.original,
a.delta_factor,
a.origin
From data a
) f;
ORIGINALSIZE COMPRESSEDSIZE BEFORE_AFTER_EQUALS COMPRESSED
------------ -------------- ------------------- --------------------------------------------------------------------------------------------------------------------------------------
175 135 EQUAL LINESTRING (0.0 0.0, -2083.3235 -495.6134, -364.7 1459.8, -5517.9 -1393.0, -561.4 -2444.5, 3795.1 888.7, -1420.2 -1150.4, 1372.6 192.5)
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_DeleteVertex -- Function which deletes the coordinate at position p_vertex_id from the underlying geometry.
SYNOPSIS
Member Function ST_DeleteVertex (p_vertex_id in integer)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Function that deletes the coordinate at position p_vertex_id in the underlying geometry.
p_verted_id Values:
1. null -> defaults to -1;
2. -1 -> maximum number of points ie ST_NumPoints()
3. Greater than ST_NumPoints() -> maximum number of points ie ST_NumPoints(p_geometry)
ARGUMENTS
p_vertex_id (integer) - Coordinate to be deleted.
RESULT
updated geom (geometry) - Geometry with coordinate deleted.
EXAMPLE
select t_geometry(
sdo_geometry('LINESTRING(0 0,1 1,2 2)',NULL),0.005,2,1
).ST_DeleteVertex(
p_vertex_id => 2
).ST_AsText() as updatedGeom
from dual;
UPDATEDGEOM
-------------------
LINESTRING(0 0,1 1)
ERRORS
Can throw one of the following exceptions:
1. ORA-20122: Deletion of vertex within an existing circular arc not allowed.
2. ORA-20123: Deletion vertex position is invalid.
3. ORA-20124: Vertex delete invalidated geometry, with reason of: <Reason>
Exception ORA-20124 will include result from SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT.
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM package.
Simon Greener - July 2011 - Port to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Densify -- Implements a basic geometry densification algorithm.
SYNOPSIS
Member Function ST_Densify(p_distance In Number,
p_unit In Varchar2 Default NULL)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function add vertices to an existing vertex-to-vertex described (m)linestring or (m)polygon sdo_geometry.
New vertices are added in such a way as to maintain existing vertices.
That is, no existing vertices are removed.
Densification occurs on a single vertex-to-vertex segment basis.
If segment length is < p_distance no vertices are added.
No vertex is ever added such that the distance to the next vertex is < SELF.tolerance.
The implementation does not guarantee that the added vertices will be exactly p_distance apart.
The final vertex separation will be BETWEEN p_distance AND p_distance * 2 .
The implementation honours 3D and 4D shapes and averages these dimension values
for the new vertices.
The function does not support compound objects or objects with circles,
optimised rectangles or described by arcs.
Any non (m)polygon/(m)linestring shape is simply returned as it is.
ARGUMENTS
p_distance (Number) -- The desired optimal distance between added vertices. Must be > SELF.tolerance.
p_unit (varchar2) -- Unit of measure associated with p_distance and for calculations.
RESULT
geometry (T_GEOMETRY) -- Densified geometry.
EXAMPLE
-- Simple Straight line.
select t_geometry(
sdo_geometry(2002,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(100,100,900,900.0)),
0.005,2,1)
.ST_Densify(p_distance=>125.0,
p_unit=>null)
.ST_Round(3,3,2,1)
.geom as geom
from dual;
GEOM
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(188.889,188.889,277.778,277.778,366.667,366.667,455.556,455.556,544.444,544.444,633.333,633.333,722.222,722.222,811.111,811.111))
-- Simple Linestring with Z
select t_geometry(
sdo_geometry(3002,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(100,100,1.0, 900,900.0,9.0)),
0.005,2,1)
.ST_Densify(p_distance=>125.0,
p_unit=>null)
.ST_Round(3,3,2,1)
.geom as geom
from dual;
GEOM
-------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(100,100,1,188.889,188.889,1.89,277.778,277.778,2.78,366.667,366.667,3.67,455.556,455.556,4.56,
544.444,544.444,5.44,633.333,633.333,6.33,722.222,722.222,7.22,811.111,811.111,8.11,900,900,9))
-- Simple LineString with Z and Measures
select t_geometry(
sdo_geometry(4402,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(100,100, -4.56, 0.99,
900,900.0,-6.73,1131.2)),
0.005,2,1)
.ST_Densify(p_distance=>125.0,
p_unit=>null)
.ST_Round(3,3,2,2)
.geom as geom
from dual;
GEOM
----------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(4402,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(100.0,100.0,-4.56,0.99, 166.667,166.667,-4.74,95.17, 233.333,233.333,-4.92,189.36, 300.0,300.0,-5.1,283.54,
366.667,366.667,-5.28,377.73, 433.333,433.333,-5.46,471.91, 500.0,500.0,-5.65,566.1, 566.667,566.667,-5.83,660.28,
633.333,633.333,-6.01,754.46, 700.0,700.0,-6.19,848.65, 766.667,766.667,-6.37,942.83, 833.333,833.333,-6.55,1037.02,
900.0,900.0,-6.73,1131.2))
with data as (
select t_geometry(
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
1100.765,964.286, 1161.99,739.796, 963.01,596.939, 677.296,775.51,
460.459,880.102, 253.827,793.367, 174.745,630.102, 228.316,497.449,
455.357,528.061, 718.112,446.429, 713.01,290.816, 598.214,125.0,
373.724,81.633, 67.602,267.857)),
0.05,2,1)
as "Original Geometry"
from dual
)
select a."Original Geometry".ST_Densify(p_distance=>25.0).ST_Round(2).geom as "Densified Geometry" from data a;
Densified Geometry
--------------------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(1100.77,964.29,1107.57,939.34,1114.37,914.4,1121.17,889.46,1127.98,864.51,
1134.78,839.57,1141.58,814.63,1148.38,789.68,1155.19,764.74,1161.99,739.8,1139.88,723.92,1117.77,708.05,1095.66,692.18,1073.55,676.3
1051.45,660.43,1029.34,644.56,1007.23,628.69,985.12,612.81,963.01,596.94,941.03,610.68,919.05,624.41,897.08,638.15,875.1,651.88,853.12,
665.62,831.14,679.36,809.16,693.09,787.19,706.83,765.21,720.57,743.23,734.3,721.25,748.04,699.27,761.77,677.3,775.51,653.2,787.13,629.11,
798.75,605.02,810.37,580.92,822,556.83,833.62,532.74,845.24,508.65,856.86,484.55,868.48,460.46,880.1,434.63,869.26,408.8,858.42,382.97,
847.58,357.14,836.73,331.31,825.89,305.49,815.05,279.66,804.21,253.83,793.37,242.53,770.04,231.23,746.72,219.93,723.4,208.64,700.07,197.34,
676.75,186.04,653.43,174.75,630.1,185.46,603.57,196.17,577.04,206.89,550.51,217.6,523.98,228.32,497.45,253.54,500.85,278.77,504.25,304,507.65,
329.22,511.05,354.45,514.46,379.68,517.86,404.9,521.26,430.13,524.66,455.36,528.06,479.24,520.64,503.13,513.22,527.02,505.8,550.9,498.38,574.79,
490.96,598.68,483.53,622.56,476.11,646.45,468.69,670.34,461.27,694.23,453.85,718.11,446.43,717.26,420.49,716.41,394.56,715.56,368.62,714.71,
342.69,713.86,316.75,713.01,290.82,698.66,270.09,684.31,249.36,669.96,228.64,655.61,207.91,641.26,187.18,626.91,166.45,612.56,145.73,598.21,125,
573.27,120.18,548.33,115.36,523.38,110.54,498.44,105.73,473.5,100.91,448.55,96.09,423.61,91.27,398.67,86.45,373.72,81.63,351.86,94.93,329.99,
108.24,308.13,121.54,286.26,134.84,264.39,148.14,242.53,161.44,220.66,174.75,198.8,188.05,176.93,201.35,155.07,214.65,133.2,227.95,111.33,241.25,
89.47,254.56,67.6,267.86))
NOTES
Only supports stroked (m)linestrings and (m)polygon rings.
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2006 - Original coding in GEOM package.
Simon Greener - August 2018 - Port/Rewrite to T_GEOMETRY object function member.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Difference -- Returns the spatial difference between two sdo_geometry objects.
SYNOPSIS
Member Function ST_Difference(p_geometry in mdsys.sdo_geometry,
p_order in varchar2 Default 'FIRST')
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function determines the difference between two linestrings, polygons or a mix of either.
The p_order parameter determines whether SELF.geom is the first argument to sdo_difference or second.
ARGUMENTS
p_geometry (sdo_geometry) -- A linestring or polygon.
p_order (varchar2) -- Should be FIRST or SECOND.
RESULT
geometry (T_GEOMETRY) -- Result of differencing the geometries.
NOTES
Uses MDSYS.SDO_GEOM.SDO_DIFFERENCE if Oracle database version is 12cR1 or above
or if the customer is licensed for the Spatial object before 12c.
ERRORS
Will throw exception if the user is not licensed to call MDSYS.SDO_GEOM.SDO_DIFFERENCE.
-20102 MDSYS.SDO_GEOM.SDO_DIFFERENCE only supported for Locator users from 12c onwards.';
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Dimension -- Returns spatial dimension of underlying geometry.
SYNOPSIS
Member Function ST_Dimension
Return Integer Deterministic,
NOTES
Is an implementation of OGC ST_Dimension method.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('POINT(0 0)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('MULTILINESTRING((-1 -1, 0 -1),(0 0,10 0,10 5,10 10,5 10,5 5))',null),0.005,3,1) as tgeom From Dual union all
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom From Dual union all
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom From Dual
)
select a.tGeom.ST_GType() as sdo_gtype,
a.tgeom.ST_GeometryType() as geomType,
a.tgeom.ST_Dimension() as geomDim
from data a;
SDO_GTYPE GEOMTYPE GEOMDIM
--------- -------------------- -------
1 ST_POINT 0
2 ST_LINESTRING 1
6 ST_MULTILINESTRING 1
3 ST_POLYGON 2
7 ST_MULTIPOLYGON 2
7 ST_MULTIPOLYGON 2
6 rows selected
DESCRIPTION
Is OGC method that returns the geometric dimension of the underlying geometry.
The dimensions returned are:
GeometryType Dimension
------------ ---------
Point 0
LineString 1
Polygon 2
OGC Dimension is not to be confused with coordinate dimension ie number of ordinates. See ST_CoordDimension.
RESULT
Dimension (Integer) -- 0 if 2001/3 if 3001; 1 if 2002/3302/3002; 2 if 2003/2007/3003/3007 etc.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_DimInfo2Rectangle -- Converts diminfo structure in XXX_SDO_GEOM_METADATA to a polygon with an optimized rectangle exterior ring.
SYNOPSIS
Static Function ST_DimInfo2Rectangle (
p_dim_array in mdsys.sdo_dim_array,
p_srid in integer default NULL
)
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
DESCRIPTION
Converts any DIMINFO structure to a polygon by converted its SDO_DIM_ELEMENT X/Y sdo_lb/sdo_ub values to a single optimized rectangle exterior ring.
RESULT
polygon (T_GEOMETRY) -- Returns polygon with single optimized rectangle exterior ring.
EXAMPLE
select u.table_name, u.column_name, t_geometry.ST_DimInfo2Rectangle(u.diminfo,u.srid).geom as tgeom
from user_sdo_geom_metadata u;
TABLE_NAME COLUMN_NAME TGEOM
------------------------ ----------- --------------------------------------------------------------------------------------------------------------------------------------------------------
LAND_PARCELS GEOM SDO_GEOMETRY(2003,2872,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(5979462.12680312,2085800.17222035,6024838.75881869,6024838.75881869))
BASE_ADDRESSES GEOM SDO_GEOMETRY(2003,2872,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(5979545.39731847,2085905.79636266,6022316.7615783,6022316.7615783))
BUILDING_FOOTPRINTS GEOM SDO_GEOMETRY(2003,2872,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(5980643.24426599,2086024.32003938,6024465.06003997,6024465.06003997))
ROAD_CLINES GEOM SDO_GEOMETRY(2003,2872,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(5979762.10717428,2085798.82445402,6024890.06350611,6024890.06350611))
WATER_AREAS GEOM SDO_GEOMETRY(2003,8307,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(-122.698410000002,37.44539000205,-122.049420001407,-122.049420001407))
BANKS_3785 GEOM SDO_GEOMETRY(2003,3785,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(16805978.88835578,-4028254.329242822,16823678.019474965,16823678.019474965))
FEDERAL_LOWER_HOUSE_2016 GEOM SDO_GEOMETRY(2003,4283,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(96.816766,-43.74051,159.109219,159.109219))
PROJPOINT3D GEOM SDO_GEOMETRY(3003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(358312.903,-140.5,-140.5,5406991.847,5406991.847,359370.628))
PROJPOINT2D GEOM SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(358312.903,359370.628,5406991.847,5406991.847))
LAND_PARCELS CENTROID SDO_GEOMETRY(2003,2872,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(5979545.39704517,2085843.32119355,6022727.95207985,6022727.95207985))
10 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Dims -- Returns number of ordinate dimensions
SYNOPSIS
Member Function ST_Dims
Return Integer Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry get_dims() method ie SELF.GEOM.Get_Dims()
RESULT
dimension (Integer) -- 2 if data 2D; 3 if 3D; 4 if 4D
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Distance -- Returns distance from current T_geometry (SELF) to supplied T_GEOMETRY.
SYNOPSIS
Member Function ST_Distance(p_geom in &&INSTALL_SCHEMA..T_GEOMETRY,
p_unit in varchar2 default NULL,
p_round in integer default 0 )
Return Number Deterministic
ARGUMENTS
p_geom (T_GEOMETRY) - A T_GEOMETRY to which a distance is calculated.
p_unit (VarChar2) - Oracle Unit of Measure eg unit=M.
p_round (BIT) - Whether to round result using PRECISION of T_GEOMETRY
DESCRIPTION
This function computes a distance from the current object (SELF) to the supplied T_Geometry.
Result is in the distance units of the SDO_SRID, or in p_units where supplied.
Result is rounded to SELF.PRECISION if p_round is true (1), otherwise false(0) no rounding.
With data as (
Select T_GEOMETRY(sdo_geometry('POINT(0 0)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3001,NULL,SDO_POINT_TYPE(0,0,0),null,null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SDO_ORDINATE_ARRAY(0,0,1, 10,0,2, 10,5,3, 10,10,4, 5,10,5, 5,5,6, 0,0,0)),0.005,3,1) as tgeom From Dual union all
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',28356),0.0005,3,1) as tgeom From Dual
)
select a.tGeom.ST_GeometryType() as geometryType,
a.tgeom.ST_Srid() as srid,
case when a.tGeom.ST_Srid() = 28356 then 'CM' else 'M' end as unit,
a.tgeom.ST_Distance(sdo_geometry('POINT(51 41)',a.tGeom.ST_Srid()),
case when a.tGeom.ST_Srid() = 28356 then 'unit=CM' else null end,
0) as distance,
a.tgeom.ST_Distance(sdo_geometry('POINT(51 41)',a.tGeom.ST_Srid()),
case when a.tGeom.ST_Srid() = 28356 then 'unit=CM' else null end,
1) as round_distance
from data a;
GEOMETRYTYPE SRID UNIT DISTANCE ROUND_DISTANCE
-------------- ------ ---- ------------ --------------
ST_POINT (NULL) M 65.4369926 65.437
ST_POINT (NULL) M 65.4369926 65.437
ST_LINESTRING (NULL) M 51.4003891 51.4
ST_LINESTRING (NULL) M 51.4003891 51.4
ST_POLYGON (NULL) M 51.4003891 51.4
ST_POLYGON 28356 CM 3744.329045 3744.329
6 rows selected
RESULT
distance (Number) -- Distance in SRID unit of measure or in supplied units (p_unit)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Dump -- Extracts all parts of a multipart linestring, polygon, or collection geometry.
SYNOPSIS
Member Function ST_Dump(p_subElements IN integer Default 0)
Return &&INSTALL_SCHEMA..T_Geometries Pipelined
DESCRIPTION
Extracts all parts of an underlying geometry object.
If p_subElemets is set to TRUE (1), all subElements of a complex element
(eg compound outer ring of polygon) are extracted and returned as mdsys.sdo_geometry objects.
Individual sdo_gemetry objects are returned in a T_GEOMETRY_ROW structure that has three fields: GID, GEOMETRY and TOLERANCE.
GID values are generated in the order the elements appears in the sdo_elem_info structure.
EXAMPLE
with GEOMETRIES as (
select t_geometry(
mdsys.sdo_geometry(2007,null,null,
sdo_elem_info_array( 1,1003,1,11,2003,1,21,2003,1,
31,1005,2,31,2,1,37,2,2,43,1003,3),
sdo_ordinate_array(0,0, 20,0, 20,20, 0,20, 0,0, 10,10, 10,11, 11,11, 11,10, 10,10, 5,5, 5,7, 7,7, 7,5, 5,5,
110,128, 110,125, 120,125, 120,128, 115,130, 110,128,112,0, 113,10))
,0.005,3,1) as tPolygon
From dual
)
GID GEOMETRY TOLERANCE
--- ------------------------------------------------------------------------------------------------------------------- ---------
1 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,20,0,20,20,0,20,0,0,10,10)) 0.005
2 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(10,10,10,11,11,11,11,10,10,10,5,5)) 0.005
3 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(5,5,5,7,7,7,7,5,5,5)) 0.005
1 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(110,128,110,125,120,125,120,128)) 0.005
2 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(120,128,115,130,110,128)) 0.005
1 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,3),SDO_ORDINATE_ARRAY(112,0,113,10)) 0.005
6 rows selected
RESULT
Geometry (T_GEOMETRY_ROW) -- Table (T_GEOMETRIES) of T_GEOMETRY_ROW objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Elem_Info_Equal -- Compares current object (SELF) geometry's GEOM.SDO_ELEM_INFO object with supplied p_elem_info mdsys.sdo_elem_info_array.
SYNOPSIS
Member Function ST_Elem_Info_Equal(p_elem_info in mdsys.sdo_elem_info_array)
Return Integer Deterministic
DESCRIPTION
This function compares current t_geometry object's SELF.GEOM.SDO_ELEM_INFO object to supplied p_sdo_elem_info object.
Result can be one of the following:
0 if one or other sdo_elem_info_array structures are null but not both.
1 if two non-null structures and all offset/etype/interpretation ordinates are equal;
-1 if sdo_elem_info not all offset/etype/interpretation ordinates are equal
ARGUMENTS
p_elem_info (sdo_elem_info_array) -- sdo_elem_info array that is to be compared to current object geometry's SELF.GEOM.sdo_elem_info object.
RESULT
-1,0,1 (Integer) -- 0 if one or other sdo_elem_info_array structures are null but not both.
-- 1 if two non-null structures and all offset/etype/interpretation ordinates are equal;
-- -1 if sdo_elem_info not all offset/etype/interpretation ordinates are equal
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_ElementTypeAt -- Element_Type value in Sdo_Elem_Info triplet index.
SYNOPSIS
Member Function ST_ElementTypeAt
Return &&INSTALL_SCHEMA..T_ElemInfo
DESCRIPTION
If a geometry is coded with an SDO_ELEM_INFO_ARRAY this function will extract the triplet at index p_element,
and return the element type (etype) stored in that triplet.
An T_ElemInfo object is:
CREATE TYPE &&INSTALL_SCHEMA..T_ElemInfo AS OBJECT (
offset Number,
etype Number, <--- This is returned.
interpretation Number
);
EXAMPLE
with data as (
Select T_Geometry(
SDO_GEOMETRY(2007,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1005,2, 1,2,1, 5,2,2,
11,2005,2, 11,2,1, 15,2,2,
21,1005,2, 21,2,1, 25,2,2),
SDO_ORDINATE_ARRAY( 6,10, 10,1, 14,10, 10,14, 6,10,
13,10, 10,2, 7,10, 10,13, 13,10,
106,110, 110,101, 114,110, 110,114,106,110)
),0.005,2,1) as tgeom
from dual
)
select a.tGeom.geom.sdo_elem_info as elem_info,
a.tGeom.ST_NumElementInfo() as numElemInfos,
t.IntValue as element_id,
a.tgeom.ST_ElementTypeAt(t.IntValue) as elem_type_at
from data a,
TABLE(tools.generate_series(1,a.tgeom.ST_NumSubElements(),1)) t;
ELEM_INFO NUMELEMINFOS ELEMENT_ID ELEM_TYPE_AT
----------------------------------------------------------------------------------------- ------------ ---------- ------------
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 1 1005
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 2 2
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 3 2
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 4 2005
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 5 2
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 6 2
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 7 1005
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 8 2
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,5,2,2,11,2005,2,11,2,1,15,2,2,21,1005,2,21,2,1,25,2,2) 9 9 2
9 rows selected
RESULT
Element Type (Integer)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2006 - Original coding in GEOM package.
Simon Greener - Jan 2013 - Port to T_GEOMETRY object.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_ElemInfo -- Returns underlying mdsys.sdo_geometry's SDO_ELEM_INFO array as a Set of T_ElemInfo objects.
SYNOPSIS
Member Function ST_ElemInfo
Return &&INSTALL_SCHEMA..T_ElemInfoSet pipelined
DESCRIPTION
If a geometry is coded with an SDO_ELEM_INFO_ARRAY this function will extract the triplets that describe
each element and returns them as a set of T_ELEM_INFO objects.
The T_ElemInfo object is:
CREATE TYPE &&INSTALL_SCHEMA..T_ElemInfo AS OBJECT (
offset Number,
etype Number,
interpretation Number
);
RESULT
Set of T_ElemInfo objects (Integer)
NOTES
Function is pipelined
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2006 - Original coding in GEOM package.
Simon Greener - Jan 2013 - Port to T_GEOMETRY object.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_EndPoint -- Returns last Point in underlying geometry.
SYNOPSIS
Member Function ST_EndPoint
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
Returns last point in underlying geometry.
EXAMPLE
With data As (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,20 0,20 20,10 20,0 20)',null),0.005,3,1) as tLine
From Dual
)
select a.tLine.ST_EndPoint().ST_AsText() as end_Point
from data a;
END_POINT
----------------
POINT (0.0 20.0)
RESULT
Point (T_GEOMETRY) -- First point in underlying geometry.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_EndSegment -- Returns last Segment in underlying geometry.
SYNOPSIS
Member Function ST_EndSegment
Return &&INSTALL_SCHEMA..T_Segment Deterministic,
DESCRIPTION
Returns last segment in underlying geometry.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GeometryType() as geometryType,
a.tGeom.ST_EndSegment().ST_AsText() as end_segment
from data a;
GEOMETRYTYPE END_SEGMENT
------------- -----------------------------------------------------------------------------------------------------------
ST_LINESTRING SEGMENT(1,1,5,Start(5,10,NULL,NULL,5,2001,NULL),End(5,5,NULL,NULL,6,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON SEGMENT(1,2,4,Start(11,10,NULL,NULL,4,2001,NULL),End(10,10,NULL,NULL,5,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
RESULT
Segment (T_GEOMETRY) -- Last segment in underlying geometry.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_EndVertex -- Returns last vertex in underlying geometry.
SYNOPSIS
Member Function ST_EndVertex
Return T_Vertex Deterministic
RESULT
Vertex (T_Vertex) -- Vertex at end of geometry.
DESCRIPTION
Returns last vertex describing underlying geometry.
Actual end vertex ID is provided in returned T_Vertex object.
EXAMPLE
With data As (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,20 0,20 20,10 20,0 20)',null),0.005,3,1) as tLine
From Dual
)
select a.tLine.ST_EndVertex().ST_AsText() as end_vertex
from data a;
VERTEX
-----------------------------------------------------------
T_Vertex(X=0.0,Y=20.0,Z=NULL,W=NULL,ID=5,GT=2001,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Envelope - Returns lower left and upper right coordinates of underlying geometry's envelope.
SYNOPSIS
Member Function ST_Envelope
Return T_GEOMETRY Determinsitic
RESULT
MBR Geometry (T_GEOMETRY) -- Single Polygon with Optimized Rectangle Exterior Ring.
DESCRIPTION
Supplied with a non-NULL geometry, this function returns the envelope or minimum bounding rectangle as a polygon geometry with one optimized rectangle exterior ring.
EXAMPLE
select T_Geometry(sdo_geometry('LINESTRING(0 0,0.1 0.1,0.5 0.5,0.8 0.8,1 1)',NULL),0.005,2,1).ST_Envelope().geom as mbrGeom
from dual;
MBRGEOM
--------------------------------------------------------------------------------------
SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(0,0,1,1))
NOTES
Wrapper over T_GEOMETRY.ST_MBR.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2005 - Original coding for GEOM package.
Simon Greener - July 2011 - Converted to T_GEOMETRY from GEOM package.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Equals -- Compares current object (SELF) with supplied T_GEOMETRY.
SYNOPSIS
Member Function ST_Equals(p_geometry in mdsys.sdo_geometry,
p_z_precision in integer default 2,
p_m_precision in integer default 3)
Return varchar2 deterministic
DESCRIPTION
This function compares current t_geometry object's sdo_geometry (SELF.GEOM) to supplied p_geometry object.
Only compares SDO_GEOMETRY objects.
Result can be one of the following:
EQUAL
FAIL:DIMS
FAIL:SDO_ELEM_INFO
FAIL:SDO_ELEM_INFO
FAIL:SDO_GTYPE
FAIL:SDO_POINT
FAIL:SDO_SRID
FALSE:NULL
Result of mdsys.sdo_geom.relate (if licensed)
ARGUMENTS
p_geometry (SDO_GEOMETRY) -- SDO_GEOMETRY that is to be compared to current object geometry (SELF.GEOM).
p_z_precision (integer) -- Z Ordinate precision for comparison using ROUND
p_m_precision (integer) -- M Ordinate precision for comparison using ROUND
RESULT
EQUAL/FAIL (VarChar2) -- EQUAL or FAIL:{Reason}
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Extend -- Function that lengthens underlying linestring at one or both ends.
SYNOPSIS
Member Function ST_Extend (p_length in number,
p_start_end in varchar2 default 'START',
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Function that extends the supplied linestring at either its start or end (p_end).
p_length should alway be positive. If it is negative ST_Reduce is called: see ST_Reduce documentation.
And extension occurs in the direction of a line formed by the first and second vertices (if START) or last and second last vertices (if END).
p_end value of BOTH means line is extended at both ends.
TODO
Add p_keep parameter:
If p_keep is set to 1, the start or end vertex is kept and a new vertex added at the extended length from the start/end.
If p_keep is 0, the actual first or last vertex is moved.
EXAMPLE
-- Extend linestring at start 50 feet.
With road_clines As (
select T_GEOMETRY(
SDO_GEOMETRY(2002,2872,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(5995293.06,2105941.35, 5995094.87,2105871.28,
5995044.46,2105492.80, 5995033.03,2105411.14,
5995012.60,2105371.13, 5994950.04,2105332.47)),
0.005,2,1)
as tgeom
from dual
)
SELECT round(rl.tgeom.ST_Length('unit=U.S. Foot'),2) as original_Length,
round(rl.tgeom
.ST_Extend(90,'START','unit=U.S. Foot')
.ST_Round()
.ST_Length('unit=U.S. Foot'),2) as new_length,
rl.tgeom
.ST_Extend(90,'START','unit=U.S. Foot')
.ST_Round()
.ST_AsText() as sGeom
FROM road_clines rl;
ORIGINAL_LENGTH NEW_LENGTH SGEOM
--------------- ---------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------
792.96 882.96 LINESTRING (5995377.91274448 2105971.34965591, 5995094.87 2105871.28, 5995044.46 2105492.8, 5995033.03 2105411.14, 5995012.6 2105371.13, 5994950.04 2105332.47)
-- MultiLineString Extend Example ...
With data As (
select T_Geometry(
sdo_geometry('MULTILINESTRING((1 1,2 2,3 3,4 4),(0 2,1 3,2 4,3 5))',null),
0.005,2,1) as tgeom
from dual
)
select Start_end,
seLength,
gLength as originalLength,
f.tGeom.ST_Length(p_round=>f.tGeom.dprecision) as newLength,
f.tGeom.ST_Round(f.tGeom.dprecision,1,1).ST_AsText() as geom
from (select a.tgeom.ST_Length(p_round=>a.tGeom.dprecision) as gLength,
'START' as Start_End,
1.414 as seLength,
a.tgeom.ST_Extend(1.414,'START') as tgeom
from data a
union all
select a.tgeom.ST_Length(p_round=>a.tGeom.dprecision) as gLength,
'BOTH' as Start_End,
1.414 as seLength,
a.tgeom.ST_Extend(1.414,'BOTH') as tgeom
from data a
union all
select a.tgeom.ST_Length(p_round=>a.tGeom.dprecision) as gLength,
'END' as Start_End,
1.414 as seLength,
a.tgeom.ST_Extend(1.414,'END') as tgeom
from data a
) f;
START_END SELENGTH ORIGINALLENGTH NEWLENGTH GEOM
--------- -------- -------------- ---------- ------------------------------------------------------------
START 1.414 8.49 9.9 MULTILINESTRING ((0 0, 2 2, 3 3, 4 4), (0 2, 1 3, 2 4, 3 5))
BOTH 1.414 8.49 11.31 MULTILINESTRING ((0 0, 2 2, 3 3, 4 4), (0 2, 1 3, 2 4, 4 6))
END 1.414 8.49 9.9 MULTILINESTRING ((1 1, 2 2, 3 3, 4 4), (0 2, 1 3, 2 4, 4 6))
NOTES
Points, GeometryCollections, Polygons, MultiPolygons, CircularStrings are not supported.
Assumes planar projection eg UTM.
ARGUMENTS
p_length (number) - If negative ST_Reduce is called on the linestring.
If positive the linestring is extended.
Distance must be expressed in SRID or p_unit units
p_start_end (varchar2) - START means extend line at the start; END means extend at the end, and BOTH means extend at both START and END of line.
p_unit (varchar2) - Allows default Oracle unit of measure (UoM) to be overridden eg if unit M is default for SRID then unit=CM will compute in centimeters.
p_keep (int) - (Future) Keep existing first/last vertex and add new (1) vertices, or move (0) existing start/end vertex.
RESULT
linestring (t_geometry) - Input geometry extended as instructed.
ERRORS
The following exceptions can be thrown:
ORA-20120 - Geometry must not be null or empty (*ERR*)
Where *ERR* is replaced with specific error
ORA-20121 - Geometry must be a single linestring.
ORA-20122 - Start/End parameter value (*VALUE*) must be START, BOTH or END
Where *VALUE* is the supplied, incorrect, value.
ORA-20123 - p_length value must not be 0 or NULL.
AUTHOR
Simon Greener
Simon Greener - December 2006 - Original Coding for GEOM Package
Simon Greener - July 2011 - Port to T_GEOMETRY
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_ExteriorRing -- Returns All Outer Rings of a polygon or multipolygon.
SYNOPSIS
Member Function ST_ExteriorRing()
Return T_GEOMETRY Deterministic,
DESCRIPTION
This function extracts all the exterior (outer) rings of a polygon/multipolygon and returns them as a T_GEOMETRY object.
NOTES
Is an implementation of OGC ST_ExteriorRing method.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_ExteriorRing().ST_AsText() as ExteriorRing
from data a;
EXTERIORRING
-----------------------------------------------------------------------------------------------
MULTIPOLYGON (((0 0, 20 0, 20 20, 0 20, 0 0)), ((100 100, 200 100, 200 200, 100 200, 100 100)))
RESULT
Exterior ring(s) (T_GEOMETRY) -- For example, if a single Polygon with 1 exterior and 1 interior ring is provided, then a single polygon with a single exterior ring is returned.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_ExtractRings -- Extracts all single geometry objects from geometry collection, multi linestring or multi polygon.
SYNOPSIS
Member Function ST_Extract
Return &&INSTALL_SCHEMA..T_GEOMETRIES Pipelined
DESCRIPTION
This function extracts all single geometry types (eg point, linestring, polygon) from the underlying geometry.
The underlying geometry object must be a geometry collection (x004), multi linestring (x006) or multi polygon (x007).
EXAMPLE
with data as (
select 1 as geomid, t_geometry(sdo_geometry(2004,null,null,sdo_elem_info_array(1,1,1, 3,2,1, 7,1003,1), sdo_ordinate_array(10,5, 10, 10,20,10,10,105, 15,105, 20,110, 10,110, 10,105)),0.05) as tgeom
from dual union all
select 2 as geomid, t_geometry(sdo_geometry(2004,NULL,NULL,sdo_elem_info_array(1,1003,3,5,1, 1,9,2,1, 11,2,1),sdo_ordinate_array(0, 0,100,100,50,50, 0, 0,100,100,300, 0,310, 1 )),0.05) as tgeom
from dual union all
Select 3 as geomid, T_GEOMETRY(sdo_geometry('MULTILINESTRING((-1 -1, 0 -1),(0 0,10 0,10 5,10 10,5 10,5 5))',null),0.005,3,1) as tgeom
From Dual union all
Select 4 as geomid, T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.geomId,
t.gid,
t_geometry(t.geometry,t.tolerance,t.dPrecision,t.projected).ST_AsText() as tegeom
from data a,
table(a.tgeom.ST_Extract()) t;
GEOMID GID TEGEOM
------ --- -------------------------------------------------------
1 1 POINT (10 5)
1 2 LINESTRING (10 10, 20 10)
1 3 POLYGON ((10 105, 15 105, 20 110, 10 110, 10 105))
2 1 POLYGON ((0 0, 100 0, 100 100, 0 100, 0 0))
2 2 POINT (50 50)
2 3 LINESTRING (100 100)
2 4 LINESTRING (300 0, 310 1)
3 1 LINESTRING (-1 -1, 0 -1)
3 2 LINESTRING (0 0, 10 0, 10 5, 10 10, 5 10, 5 5)
4 1 POLYGON ((0 0, 20 0, 20 20, 0 20, 0 0))
4 2 POLYGON ((100 100, 200 100, 200 200, 100 200, 100 100))
11 rows selected
RESULT
polygon (T_GEOMETRY) -- All geometries are extracted and returned.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_ExtractRings -- Extracts required geometry types (point, line, polygon) from underlying geometry collection.
SYNOPSIS
Member Function ST_Extract (
p_geomType in varchar2
)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
ARGUMENTS
p_geomType (varchar2) - GeometryType to be extracted must be one of POINT,ST_POINT,LINE,LINESTRING,ST_LINESTRING,POLY,POLYGON,ST_POLYGON
RESULT
polygon (T_GEOMETRY) -- Geometries of required Geometry_Type.
DESCRIPTION
This function allows a user to extract all geometries of a particular type from the underlying geometry collection (x004).
The resultant t_geometry object could be singular eg LINESTRING or multi eg MULTILINESTRING.
EXAMPLE
with data as (
select 1 as geomid, t_geometry(sdo_geometry(2004,null,null,sdo_elem_info_array(1,1,1, 3,2,1, 7,1003,1), sdo_ordinate_array(10,5, 10, 10,20,10,10,105, 15,105, 20,110, 10,110, 10,105)),0.05) as tgeom from dual union all
select 2 as geomid, t_geometry(sdo_geometry(2004,NULL,NULL,sdo_elem_info_array(1,1003,3,5,1, 1,9,2,1, 11,2,1),sdo_ordinate_array(0, 0,100,100,50,50, 0, 0,100,100,300, 0,310, 1 )),0.05) as tgeom from dual
)
select geomId,
case t.IntValue
when 1 then 'Point'
when 2 then 'Line'
when 3 then 'Polygon'
end as geomType,
a.tgeom.ST_Extract(
case t.IntValue
when 1 then 'Point'
when 2 then 'Line'
when 3 then 'Polygon'
end
).ST_AsText() as geom
from data a,
table(tools.generate_series(1,3,1)) t
GEOMID GEOMTYPE GEOM
------ -------- --------------------------------------------------
1 Point POINT (10 5)
1 Line LINESTRING (10 10, 20 10)
1 Polygon POLYGON ((10 105, 15 105, 20 110, 10 110, 10 105))
2 Point POINT (50 50)
2 Line MULTILINESTRING ((100 100), (300 0, 310 1))
2 Polygon POLYGON ((0 0, 100 0, 100 100, 0 100, 0 0))
6 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_ExtractRings -- Extracts all rings of a polygon/multipolygon into a set of simple T_GEOMETRY polygon objects.
SYNOPSIS
Member Function ST_ExtractRings()
Return &&INSTALL_SCHEMA..T_GEOMETRIES Pipelined
DESCRIPTION
This function allows a user to extract all outer and inner rings from a polygon/multipolygon. The resultant set of
individual inner or outer rings are accessible via the Oracle SQL TABLE function as in the example below.
EXAMPLE
With Data as (
Select 1 as geomId, T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0)),0.005,3,1) as tgeom
From Dual union all
Select 2 as geomId, T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1,11,2003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0, 5,5,5,10,10,10,10,5,5,5)),0.005,3,1) as tgeom
From Dual
union all
Select 3 as geomId, T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),
((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.geomid, t.gid as ringId, t_geometry(t.geometry,t.tolerance,t.dPrecision,t.projected).ST_AsText() as geom
from data a,
table(a.tgeom.ST_ExtractRings()) t;
GEOMID RINGID GEOM
------ ------ -------------------------------------------------------
1 1 POLYGON ((0 0, 20 0, 20 20, 0 20, 0 0))
2 1 POLYGON ((0 0, 20 0, 20 20, 0 20, 0 0))
2 2 POLYGON ((5 5, 10 5, 10 10, 5 10, 5 5))
3 1 POLYGON ((0 0, 20 0, 20 20, 0 20, 0 0))
3 2 POLYGON ((10 10, 11 10, 11 11, 10 11, 10 10))
3 3 POLYGON ((5 5, 7 5, 7 7, 5 7, 5 5))
3 1 POLYGON ((100 100, 200 100, 200 200, 100 200, 100 100))
7 rows selected
RESULT
polygon (T_GEOMETRY) -- All polygon rings retured as individual polygons.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_FilterRings -- Removes rings from polygon/multipolygon below supplied area.
SYNOPSIS
Member Function ST_FilterRings(p_area in number,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
This function allows a user to remove inner rings from a polygon/multipolygon based on an area value.
Will remove both outer and inner rings.
ARGUMENTS
p_area (Number) - Area in square SRID units below which an inner ring is removed.
p_unit (VarChar2) - Oracle Unit of Measure For SRID eg unit=M.
RESULT
polygon collection (T_GEOMETRIES) -- A set of one or more single rings derived from input polygon.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as TGeom
From Dual
Union All
Select T_GEOMETRY(sdo_geometry(2007,NULL,NULL,
sdo_elem_info_array(1,1005,2, 1,2,1, 7,2,2,13,1003,3),
sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128, 0,0, 10,10)),0.005,3,1) as TGeom
From Dual
)
Select a.tGeom.ST_Area() as originalArea,
a.tGeom.ST_FilterRings(50.0).ST_Area() as filteredArea,
a.tGeom.ST_FilterRings(50.0).ST_Validate() as validate_geom
From data a;
ORIGINALAREA FILTEREDAREA VGEOM
------------ ------------ -----
395 400 TRUE
143.7507329 100 TRUE
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_FixOrdinates -- Allows calculations expressed as formula to change the ordinates of the underlying Geometry
SYNOPSIS
Member Function ST_FixOrdinates(
p_x_formula in varchar2,
p_y_formula in varchar2,
p_z_formula in varchar2 := null,
p_w_formula in varchar2 := null
)
Return mdsys.sdo_geometry Deterministic,
ARGUMENTS
p_x_formula (varchar2) -- Mathematical formula to be applied to X ordinate
p_y_formula (varchar2) -- Mathematical formula to be applied to Y ordinate
p_z_formula (varchar2) -- Mathematical formula to be applied to Z ordinate
p_w_formula (varchar2) -- Mathematical formula to be applied to W/M ordinate
RESULT
Modified Geometry (T_Geometry) -- Original geometry with modified ordinates
DESCRIPTION
The formula may reference the ordinates of the geometry via the columns X, Y, Z and W
(the T_Vertex fields produced by SDO_Util.GetVertices function) keywords.
These keywords can be referred to multiple times in a formula
(see 'ROUND ( z / ( z * dbms_random.value(1,10) ), 3 )' in the example
that processes a 3D linestring below).
Since the formula are applied via SQL even Oracle intrinsic columns like ROWNUM
can be used (see '(rownum * w)' below). One can also use any Oracle function,
eg RANDOM: this includes functions in packages such as DBMS_RANDOM
eg 'ROUND ( Y * dbms_random.value ( 1,1000) ,3 )') as well.
EXAMPLE
select t_geometry(SDO_Geometry('POINT(1.25 2.44)'),0.005,2,1)
.ST_FixOrdinates(
'ROUND(X * 3.141592653,3)',
'ROUND(Y * dbms_random.value(1,1000),3)',
NULL
).ST_AsText() as point
from dual;
POINT
----------------------
POINT (3.927 1240.552)
select t_geometry(SDO_Geometry(3001,null,sdo_point_type(1.25,2.44,3.09),null,null),0.005,2,1)
.ST_FixOrdinates(
'ROUND(X * 3.141592653,3)',
'ROUND(Y * dbms_random.value(1,1000),3)',
'ROUND(Z / 1000,3)'
).geom as point
from dual;
POINT
----------------------------------------------------------------------
SDO_GEOMETRY(3001,NULL,SDO_POINT_TYPE(3.927,1317.816,0.003),NULL,NULL)
select t_geometry(SDO_Geometry('LINESTRING(1.12345 1.3445,2.43534 2.03998398)',NULL),0.005,2,1)
.ST_FixOrdinates(
'ROUND(X * 3.141592653,3)',
'ROUND(Y * dbms_random.value(1,1000),3)'
).ST_AsText() as line
from dual;
LINE
---------------------------------------
LINESTRING (3.529 49.26, 7.651 466.107)
select t_geometry(
SDO_Geometry(3006,null,null,
sdo_elem_info_array(1,2,1,10,2,1),
sdo_ordinate_array(1.12345,1.3445,9,2.43534,2.03998398,9,3.43513,3.451245,9,10,10,9,10,20,9)),0.005,2,1)
.ST_FixOrdinates(
NULL,
NULL,
'ROUND(Y * dbms_random.value(1,1000),3)'
).geom as line
from dual;
LINE
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,10,2,1),SDO_ORDINATE_ARRAY(1.12345,1.3445,525.749,2.43534,2.03998398,952.99,3.43513,3.451245,948.895,10,10,2930.214,10,20,16775.12))
-- line string with 3 dimensions: X,Y,M
select t_geometry(
SDO_GEOMETRY(3302,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1), -- one line string, straight segments
SDO_ORDINATE_ARRAY(2,2,0,
2,4,2,
8,4,8,
12,4,12,
12,10,NULL,
8,10,22,
5,14,27)),0.005,2,1)
.ST_FixOrdinates(NULL,NULL,NULL,'(rownum * NVL(w,18))').geom as line
from dual;
LINE
---------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,0,2,4,4,8,4,24,12,4,48,12,10,90,8,10,132,5,14,189))
HISTORY
Simon Greener - February 2009 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Functions ]
NAME
ST_Flip_Segments - Turns linestring and polygon rings into segments and then flips each vector until all point in the same direction.
SYNOPSIS
Member Function ST_Flip_Vectors
Return geometry
EXAMPLE
With gc As (
select geometry::STGeomFromText(
'GEOMETRYCOLLECTION(
POLYGON((10 0,20 0,20 20,10 20,10 0)),
POLYGON((20 0,30 0,30 20,20 20,20 0)),
POINT(0 0))',0) as geom
)
select v.sx,v.sy,v.ex,v.ey,count(*)
from gc as a
cross apply
[dbo].[STVectorize] (
[dbo].[STFlipVectors] ( a.geom )
) as v
group by v.sx,v.sy,v.ex,v.ey
go
DESCRIPTION
This function extracts all vectors from supplied linestring/polygon rings, and then flips each vector until all point in the same direction.
This function is useful for such operations as finding "slivers" between two polygons that are supposed to share a boundary.
Once the function has flipped the vectors the calling function can analyse the vectors to do things like find duplicate segment
which are part of a shared boundaries that are exactly the same (no sliver).
RETURN
geometry (GeometryCollection) - The set of flipped vectors.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_FromEWKT -- Implements an import method for Extended Well Known Text including EWKT with Z and M ordinates..
SYNOPSIS
Static Function ST_FromEWKT(p_ewkt in clob)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Implements an import method for Extended Well Known Text including EWKT with Z and M ordinates..
Returns T_GEOMETRY with valid sdo_geometry object.
Will import SQL Server Spatial (AsTextZM) and PostGIS EWKT.
Supports EWKT like "POINT EMPTY".
NOTES
A description of the EWKT structure is available in the PostGIS documentation.
RESULT
New Geometry (T_GEOMETRY) -- T_GEOMETRY containing a valid sdo_geometry with 2, 3 or 4 dimensions.
EXAMPLE
with data as (
select 'SRID=28355;POINTZ (0.1 0.2 0.3)' as ewkt
from dual union all
select 'SRID=28355;POINTZM (0.1 0.2 0.3 0.4)' as ewkt
from dual union all
select 'LINESTRING (0.1 0.1,10 0,10 5,10 10,5 10,5 5)' as ewkt
from dual union all
select 'SRID=28355;LINESTRINGZ (0.1 0.1 1,10 0 2,10 5 3,10 10 4,5 10 5,5 5 6)' as ewkt
from dual union all
select 'MULTILINESTRINGM ((50.0 55.0 1, 50.0 60.0 2, 55.0 58.0 3, 50.0 55.0 4), (56.0 58.0 5, 60.0 55.0 6, 60.0 60.0 7, 56.0 58.0 8))' as ewkt
from dual union all
select 'CIRCULARSTRINGZ (10.0 15.0 3.0, 15.0 20.0 3.0, 20.0 15.0 3.0)' as ewkt
from dual union all
select 'CIRCULARSTRINGZM (10.0 15.0 3.0 0.0, 15.0 20.0 3.0 5.67, 20.0 15.0 3.0 9.84)' as ewkt
from dual union all
select 'CIRCULARSTRINGM (10.0 15.0 0.0, 15.0 20.0 5.67, 20.0 15.0 9.84)' as ewkt
from dual union all
select 'COMPOUNDCURVEZ ((10.0 45.0 0.0, 20.0 45.0 1.6), CIRCULARSTRING (20.0 45.0 1.8, 23.0 48.0 1.8, 20.0 51.0 1.8), (20.0 51.0 1.8, 10.0 51.0 1.8))' as ewkt
from dual union all
select 'SRID=28355;MULTICURVEZ (CIRCULARSTRING (50.0 35.0 3.2, 55.0 40.0 3.2, 60.0 35.0 3.2), CIRCULARSTRING (65.0 35.0 4.6, 70.0 30.0 5.6, 75.0 35.0 2.3))' as ewkt
from dual union all
select 'CURVEPOLYGON (COMPOUNDCURVE ((10.0 128.0, 10.0 125.0, 20.0 125.0, 20.0 128.0), CIRCULARSTRING (20.0 128.0, 15.0 130.0, 10.0 128.0)))' as ewkt
from dual union all
select 'MULTIPOLYGONZ (((1500.0 100.0 0.0, 1900.0 100.0 0.1, 1900.0 500.0 0.2, 1500.0 500.0 0.3, 1500.0 100.0 0.0)), ((1900.0 500.0 2.0, 2300.0 500.0 2.1, 2300.0 900.0 2.2, 1900.0 900.0 1.8, 1900.0 500.0 2.0)))' as ewkt
from dual union all
select 'GEOMETRYCOLLECTION (POINT (10.0 5.0), LINESTRING (10.0 10.0, 20.0 10.0), POLYGON ((10.0 105.0, 15.0 105.0, 20.0 110.0, 10.0 110.0, 10.0 105.0)))' as ewkt
from dual union all
select 'SRID=28355;GEOMETRYCOLLECTIONZ (POINT (10.0 5.0 1.0), LINESTRING (10.0 10.0 1.1, 20.0 10.0 1.2), POLYGON ((10.0 105.0 1.3, 15.0 105.0 1.3, 20.0 110.0 1.4, 10.0 110.0 1.2, 10.0 105.0 1.3)))' as ewkt
from dual
)
select T_GEOMETRY.ST_FromEWKT(a.ewkt).geom as geomFromEWkt
from data a;
GEOMFROMEWKT
----------------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3001,28355,SDO_POINT_TYPE(0.1,0.2,0.3),NULL,NULL)
SDO_GEOMETRY(4401,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,1,1),
SDO_ORDINATE_ARRAY(0.1,0.2,0.3,0.4))
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(0.1,0.1,10,0,10,5,10,10,5,10,5,5))
SDO_GEOMETRY(3002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(0.1,0.1,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6))
SDO_GEOMETRY(3306,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1,13,2,1),
SDO_ORDINATE_ARRAY(50,55,1,50,60,2,55,58,3,50,55,4,56,58,5,60,55,6,60,60,7,56,58,8))
SDO_GEOMETRY(3002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2),
SDO_ORDINATE_ARRAY(10,15,3,15,20,3,20,15,3))
SDO_GEOMETRY(4402,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2),
SDO_ORDINATE_ARRAY(10,15,3,0,15,20,3,5.67,20,15,3,9.84))
SDO_GEOMETRY(3302,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2),
SDO_ORDINATE_ARRAY(10,15,0,15,20,5.67,20,15,9.84))
SDO_GEOMETRY(3002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,4,3,1,2,1,4,2,2,10,2,1),
SDO_ORDINATE_ARRAY(10,45,0,20,45,1.6,20,45,1.8,23,48,1.8,20,51,1.8,20,51,1.8,10,51,1.8))
SDO_GEOMETRY(3006,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2,10,2,2),
SDO_ORDINATE_ARRAY(50,35,3.2,55,40,3.2,60,35,3.2,65,35,4.6,70,30,5.6,75,35,2.3))
SDO_GEOMETRY(2003,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,7,2,2),
SDO_ORDINATE_ARRAY(10,128,10,125,20,125,20,128,15,130,10,128))
SDO_GEOMETRY(3007,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1003,1,16,1003,1),
SDO_ORDINATE_ARRAY(1500,100,0,1900,100,0.1,1900,500,0.2,1500,500,0.3,1500,100,0,1900,500,2,2300,500,2.1,2300,900,2.2,1900,900,1.8,1900,500,2))
SDO_GEOMETRY(2004,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1,1,3,2,1,7,1003,1),
SDO_ORDINATE_ARRAY(10,5,10,10,20,10,10,105,15,105,20,110,10,110,10,105))
SDO_GEOMETRY(3004,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,1,1,4,2,1,10,1003,1),
SDO_ORDINATE_ARRAY(10,5,1,10,10,1.1,20,10,1.2,10,105,1.3,15,105,1.3,20,110,1.4,10,110,1.2,10,105,1.3))
14 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_FromText -- This is a wrapper function that has the ST_FromText name common to users of PostGIS.
SYNOPSIS
Static Function ST_FromText(p_wkt in clob,
p_srid in integer default NULL)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Implements an import method for standard Well Known Text.
Returns T_GEOMETRY with valid sdo_geometry object.
Uses the SDO_GEOMETRY(CLOB,INTEGER) constructor to create a
T_GEOMETRY object with default tolerance, dPrecision and projected variable values.
RESULT
New Geometry (T_GEOMETRY) -- T_GEOMETRY containing a valid 2D sdo_geometry object with default parameters.
EXAMPLE
with data as (
select 'POINT (0.1 0.2)' as wkt from dual union all
select 'LINESTRING (0.1 0.1,10 0,10 5,10 10,5 10,5 5)' as wkt from dual union all
select 'MULTILINESTRING ((50.0 55.0, 50.0 60.0, 55.0 58.0, 50.0 55.0), (56.0 58.0, 60.0 55.0, 60.0 60.0, 56.0 58.0))' as wkt from dual union all
select 'CIRCULARSTRING (10.0 15.0, 15.0 20.0, 20.0 15.0)' as wkt from dual union all
select 'COMPOUNDCURVE ((10.0 45.0, 20.0 45.0), CIRCULARSTRING (20.0 45.0, 23.0 48.0, 20.0 51.0), (20.0 51.0, 10.0 51.0))' as wkt from dual union all
select 'MULTICURVE (CIRCULARSTRING (50.0 35.0, 55.0 40.0, 60.0 35.0), CIRCULARSTRING (65.0 35.0, 70.0 30.0, 75.0 35.0))' as wkt from dual union all
select 'CURVEPOLYGON (COMPOUNDCURVE ((10.0 128.0, 10.0 125.0, 20.0 125.0, 20.0 128.0), CIRCULARSTRING (20.0 128.0, 15.0 130.0, 10.0 128.0)))' as wkt from dual union all
select 'MULTIPOLYGON (((1500.0 100.0, 1900.0 100.0, 1900.0 500.0, 1500.0 500.0, 1500.0 100.0)), ((1900.0 500.0, 2300.0 500.0, 2300.0 900.0, 1900.0 900.0, 1900.0 500.0)))' as wkt from dual union all
select 'GEOMETRYCOLLECTION (POINT (10.0 5.0), LINESTRING (10.0 10.0, 20.0 10.0), POLYGON ((10.0 105.0, 15.0 105.0, 20.0 110.0, 10.0 110.0, 10.0 105.0)))' as wkt from dual
)
select T_GEOMETRY.ST_FromText(a.wkt).geom as geomFromWkt
from data a;
GEOMFROMWKT
---------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(0.1,0.2,NULL),NULL,NULL)
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(0.1,0.1,10,0,10,5,10,10,5,10,5,5))
SDO_GEOMETRY(2006,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1,9,2,1),
SDO_ORDINATE_ARRAY(50,55,50,60,55,58,50,55,56,58,60,55,60,60,56,58))
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2),
SDO_ORDINATE_ARRAY(10,15,15,20,20,15))
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,4,3,1,2,1,3,2,2,7,2,1),
SDO_ORDINATE_ARRAY(10,45,20,45,23,48,20,51,10,51))
SDO_GEOMETRY(2006,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2,7,2,2),
SDO_ORDINATE_ARRAY(50,35,55,40,60,35,65,35,70,30,75,35))
SDO_GEOMETRY(2003,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,7,2,2),
SDO_ORDINATE_ARRAY(10,128,10,125,20,125,20,128,15,130,10,128))
SDO_GEOMETRY(2007,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1003,1,11,1003,1),
SDO_ORDINATE_ARRAY(1500,100,1900,100,1900,500,1500,500,1500,100,1900,500,2300,500,2300,900,1900,900,1900,500))
SDO_GEOMETRY(2004,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1,1,3,2,1,7,1003,1),
SDO_ORDINATE_ARRAY(10,5,10,10,20,10,10,105,15,105,20,110,10,110,10,105))
9 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Geometry2DimInfo -- Converts any non-null geometry into an SDO_DIM_ARRAY capable of being written to USER_SDO_GEOM_METADATA by computing MBR of object.
SYNOPSIS
Static Function ST_Geometry2DimInfo (
p_dim_array in mdsys.sdo_dim_array,
p_srid in integer default NULL
)
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
DESCRIPTION
Calculates a geometry's envelope and converts it to an SDO_DIM_ARRAY structure by populating its SDO_DIM_ELEMENT sdo_lb/sdo_ub values with computed envelope.
If T_GEOMETRY's projected attribute is 1, X/Y are returned for the SDO_DIM_NAMES; if 0, LONG/LAT are returned as the SDO_DIM_NAMES
RESULT
polygon (T_GEOMETRY) -- Returns polygon with single optimized rectangle exterior ring.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),
((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
Union All
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom
From Dual
Union All
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,projected=>0) as tgeom
From Dual
)
select a.tgeom.ST_Geometry2Diminfo() as dimInfo
from data a;
DIMINFO
-----------------------------------------------------------------------------------------------------------------------------
SDO_DIM_ARRAY(SDO_DIM_ELEMENT('X', 0,200,0.005), SDO_DIM_ELEMENT('Y', 0,200,0.005))
SDO_DIM_ARRAY(SDO_DIM_ELEMENT('X', 0, 10,0.005), SDO_DIM_ELEMENT('Y', 0, 10,0.005), SDO_DIM_ELEMENT('Z',1,6,0.005))
SDO_DIM_ARRAY(SDO_DIM_ELEMENT('LONG',0, 10,0.005), SDO_DIM_ELEMENT('LAT',0, 10,0.005), SDO_DIM_ELEMENT('Z',1,6,0.005))
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_GeometryType -- Returns underlying mdsys.sdo_geometry's SQLMM Geometry Type.
SYNOPSIS
Member Function ST_GeometryType
Return VarChar2 Deterministic,
DESCRIPTION
Is a wrapper over the ST_GEOMETRY ST_GeometryType() method. Returns textual description of the geometry type
eg ST_Polygon for x003 mdsys.sdo_geometry object.
NOTES
Is an implementation of OGC ST_GeometryType method.
RESULT
geometry type (Integer) -- 1:Point; 2:Linestring; 3:Polygon; 4:Collection; 5:MultiPoint; 6:MultiLinestring; 7:MultiPolygon
EXAMPLE
With Geometries As (
select T_GEOMETRY(sdo_geometry(2001,NULL,sdo_point_type(10,11,null),null,null),0.005,2,1) as TGEOM
From Dual Union All
Select T_GEOMETRY(sdo_geometry(2002,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(10,45, 20,45, 23,48, 20,51, 10,51)),0.005,1,1) as TGEOM
From Dual Union All
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(0,0, 10,10)),0.005,1,1) as TGEOM
From Dual Union All
select t_geometry(sdo_geometry(2003,null,null,sdo_elem_info_array(1,1005,2, 1,2,1, 7,2,2),
SDO_ORDINATE_ARRAY (10,128, 10,125, 20,125, 20,128, 15,130, 10,128)),0.005,2,1) as TGEOM
From Dual Union All
Select T_GEOMETRY(sdo_geometry(2002,null,null,sdo_elem_info_array(1,4,3, 1,2,1, 3,2,2, 7,2,1),
sdo_ordinate_array(10,45, 20,45, 23,48, 20,51, 10,51)),0.005,2,1) as TGEOM
From Dual
)
select a.TGeom.ST_GTYPE() as gtype,
a.TGeom.ST_GeometryType() as Geometrytype
From Geometries a;
GTYPE GEOMETRYTYPE
----- ----------------
1 ST_POINT
2 ST_LINESTRING
3 ST_POLYGON
3 ST_CURVEPOLYGON
2 ST_COMPOUNDCURVE
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_GType -- Returns underlying mdsys.sdo_geometry's geometry type by executing mdsys.sdo_geometry method get_gtype().
SYNOPSIS
Member Function ST_GType
Return Integer Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry get_gtype() method ie SELF.GEOM.Get_Gtype()
RESULT
geometry type (Integer) -- 1:Point; 2:Linestring; 3:Polygon; 4:Collection; 5:MultiPoint; 6:MultiLinestring; 7:MultiPolygon
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_hasCircularArcs -- A function that tests whether underlying mdsys.sdo_geometry contains circular arcs.
SYNOPSIS
Member Function ST_hasCircularArcs
Return integer Deterministic,
DESCRIPTION
Examines sdo_elem_info to see if contains ETYPE/Interpretation that describes a circular arc, or even a full circle.
RESULT
BOOLEAN (Integer) -- 1 if has circular arcs.
EXAMPLE
with data as (
select 1 as geomId, T_GEOMETRY(sdo_geometry(2002,null,null,sdo_elem_info_array(1,4,2,1,2,1,3,2,2),sdo_ordinate_array(0,0,10,0,20,10,30,0)),0.005,2,1) as tgeom
From Dual union all
select 2 as geomId, t_geometry(sdo_geometry('LINESTRING (100.0 0.0, 400.0 0.0)',NULL),0.005,2,1) as tgeom
From Dual
)
select a.geomId, a.tgeom.ST_HasCircularArcs() as hasCircularArc
from data a;
GEOMID HASCIRCULARARC
------ --------------
1 1
2 0
AUTHOR
Simon Greener
HISTORY
Simon Greener - Dec 2008 - Original coding within GEOM package.
Simon Greener - Jan 2013 - Recoded for T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_HasDimension -- Returns spatial dimension of underlying geometry.
SYNOPSIS
Member Function ST_HasDimension (
p_dim in integer default 2
)
Return Integer Deterministic,
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('POINT(0 0)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GType() as sdo_gtype,
a.tgeom.ST_GeometryType() as geomType,
a.tgeom.ST_CoordDimension() as coordDim,
a.tgeom.ST_Dimension() as geomDim,
a.tgeom.ST_HasDimension(1) as hasDim1
from data a;
SDO_GTYPE GEOMTYPE COORDDIM GEOMDIM HASDIM1
--------- -------------- -------- ------- -------
1 ST_POINT 2 0 0
2 ST_LINESTRING 2 1 1
3 ST_POLYGON 2 2 0
DESCRIPTION
This method inspects the underlying geometry and determines if has specified Geometric Dimension (ST_Dimension).
Returns 1 if geometry is of that dimension and 0 otherwise.
RESULT
true(1)/false(0) (Integer) -- If p_dim is 0 and underlying geometry is POINT then 1 is returned else 0.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_hasM -- Tests geometry to see if coordinates include a measure.
SYNOPSIS
Member Function ST_hasM
Return Integer Deterministic,
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry(3301,NULL,SDO_POINT_TYPE(0,0,0),null,null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GType() as sdo_gtype,
a.tgeom.ST_GeometryType() as geomType,
a.tgeom.ST_CoordDimension() as coordDim,
a.tgeom.ST_HasM() as hasM
from data a;
SDO_GTYPE GEOMTYPE COORDDIM HASM
--------- -------------- -------- ----
1 ST_POINT 3 1
2 ST_LINESTRING 2 0
2 ST_LINESTRING 3 0
2 ST_LINESTRING 3 1
DESCRIPTION
Examines SELF.GEOM.SDO_GTYPE (DLNN etc) to see if sdo_gtype has measure ordinate eg 3302 not 3002.
Similar to SQL Server Spatial hasM method.
RESULT
BOOLEAN (Integer) -- 1 is measure ordinate exists, 0 otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_hasRectangles -- A function that tests whether underlying mdsys.sdo_geometry contains optimized rectangles.
SYNOPSIS
Member Function ST_hasRectanglles
Return integer Deterministic,
DESCRIPTION
Examines sdo_elem_info to see if contains ETYPE/Interpretation that describes an optimized rectangle.
eg SDO_ELEM_INFO_ARRAY(1,1003,3) ie the interpretation value of 3 means optimized rectangle.
RESULT
BOOLEAN (Integer) -- 1 if has optimized rectangles.
EXAMPLE
with data as (
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0))',null),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(0,0,20,20)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(0,0,20,20, 10,10,15,15)),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_HasRectangles() as numRectangles
from data a;
HASRECTANGLES
-------------
0
1
1
NOTES
Calls ST_NumRectangles and returns 1 if num is > 0 or 0 otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jun 2011 - Original coding for GEOM package.
Simon Greener - Jan 2013 - Recoded for T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_HasZ -- Checks if underlying geometry has z ordinate.
SYNOPSIS
Member Function ST_HasZ
Return Integer Deterministic,
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('POINT(0 0)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3001,NULL,SDO_POINT_TYPE(0,0,0),null,null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GType() as sdo_gtype,
a.tgeom.ST_GeometryType() as geomType,
a.tgeom.ST_CoordDimension() as coordDim,
a.tgeom.ST_HasZ() as hasZ
from data a;
SDO_GTYPE GEOMTYPE COORDDIM HASZ
--------- -------------- -------- ----
1 ST_POINT 2 0
1 ST_POINT 3 1
2 ST_LINESTRING 2 0
2 ST_LINESTRING 3 1
2 ST_LINESTRING 3 0
DESCRIPTION
This method inspects the underlying geometry and determines if has a Z ordinate (3D).
Returns 1 if geometry has Z ordinate and 0 otherwise.
RESULT
true(1)/false(0) (Integer) -- If 2001 POINT then 0; if 3001 then 1; if 3002 then1, if 3302 then 0.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_inCircularArc -- A function that checks if the provided point is part of a circular arc.
SYNOPSIS
Member Function ST_inCircularArc
Return integer Deterministic,
DESCRIPTION
Examines underlying geometry and checks to see if the provided point reference (id) is part of a circular arc or not.
Returns position in circular arc:
0 means not in a circular arc
1 means is first point in circular arc
2 means is second point in circular arc
3 means is third point in circular arc
RESULT
BOOLEAN (integer) -- Returns position of point in circular arc (0 if not part of a circular arc)
EXAMPLE
with data as (
select T_GEOMETRY(sdo_geometry(2002,null,null,sdo_elem_info_array(1,4,2,1,2,1,3,2,2),sdo_ordinate_array(0,0,10,0,20,10,30,0)),0.005,2,1) as tgeom
From Dual
)
select a.tgeom.ST_InCircularArc(t.IntValue) as positionInCircularArc
from data a,
table(tools.generate_series(1,a.tgeom.ST_NumPoints(),1)) t
POSITIONINCIRCULARARC
---------------------
0
1
2
3
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_InsertVertex -- Function which inserts new coordinate (p_vertex) at position p_vertex.id into the supplied geometry.
SYNOPSIS
Function ST_InsertVertex (
p_vertex T_Vertex
)
Returns T_Geometry
DESCRIPTION
Function that inserts the vertex p_vertex into into supplied geometry as position p_vertex.id.
All existing vertices are shuffled down ie Insert is "add before" except at end.
Supplied p_vertex must have Z and W coded correctly.
p_vertex.id values:
1. null -> defaults to 1;
2. -1 -> maximum number of points ie SELF.ST_NumPoints()
3. Greater than SELF.ST_NumPoints() -> maximum number of points ie SELF.ST_NumPoints()
The inserted coordinate's XY ordinates are rounded to SELF.dprecision number of decimal digits of dprecision.
ARGUMENTS
p_vertex (t_vertex) -- Insert coordinate. p_vertex.id is position in geometry to insert new vertex: between 1 and SELF.ST_NumPoints.
RESULT
geometry -- Geometry with coordinate inserted.
EXAMPLE
-- Insert 2D vertex into 2D linestring
select t_geometry(sdo_geometry('LINESTRING(0 0,2 2)',null),0.005,2,1)
.ST_InsertVertex(
T_Vertex(p_id =>2,
p_x =>1,
p_y =>1,
p_sdo_gtype=>2001,
p_sdo_srid =>NULL)
).ST_AsText() as newGeom
from dual;
NEWGEOM
--------------------------
LINESTRING (0 0, 1 1, 2 2)
-- Update 3D point....
select t_geometry(sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1, 2,2,2)),0.005,2,1)
.ST_InsertVertex(
T_Vertex(p_id =>2,
p_x =>1.5,
p_y =>1.5,
p_z =>1.5,
p_sdo_gtype=>3001,
p_sdo_srid =>NULL)
).geom as UpdatedGeom
from dual;
UPDATEDGEOM
---------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,1.5,1.5,1.5))
-- Insert 3D point into 3D linestring.
select t_geometry(sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,2,2,2)),0.005,2,1)
.ST_InsertVertex(
T_Vertex(p_id =>2,
p_x =>1,
p_y =>1,
p_z =>1.5,
p_sdo_gtype=>2001,
p_sdo_srid =>NULL)
).geom as newGeom
from dual;
NEWGEOM
-----------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,1,1,1.5,2,2,2))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM package.
Simon Greener - July 2011 - Port to T_GEOMETRY.
COPYRIGHT
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Intersection -- Returns the spatial intersection of two sdo_geometry objects.
SYNOPSIS
Member Function ST_Intersection(p_geometry in mdsys.sdo_geometry,
p_order in varchar2 Default 'FIRST')
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function intersects two linestrings, polygons or a mix of either.
The p_order parameter determines whether SELF.geom is the first argument to sdo_intersection or second.
Intersection could result in a Point, Line, Polygon or GeometryCollection.
ARGUMENTS
p_geometry (sdo_geometry) -- A linestring or polygon.
p_order (varchar2) -- Should be FIRST or SECOND.
RESULT
geometry (T_GEOMETRY) -- Result of intersecting the geometries.
NOTES
Uses MDSYS.SDO_GEOM.SDO_INTERSECTION if Oracle database version is 12cR1 or above
or if the customer is licensed for the Spatial object before 12c.
ERRORS
Will throw exception if the user is not licensed to call MDSYS.SDO_GEOM.SDO_INTERSECTION.
-20102 MDSYS.SDO_GEOM.SDO_INTERSECTION only supported for Locator users from 12c onwards.';
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isClosed -- Checks if underlying geometry object is simple as per the OGC.
SYNOPSIS
Member Function ST_isClosed
Return integer Deterministic,
DESCRIPTION
This function checks to see if the underlying linestring is closed.
A closed linestring is one whose start/end points are the same as in a polygon ring.
RESULT
1/0 (integer) -- 1 if Closed, 0 if not.
With data as (
select 'Simple 2 point line' as test,
t_geometry(sdo_geometry('LINESTRING(0 0,1 1)',null),0.005,2,1) as tGeom
from dual union all
select 'Line with 4 Points with two segments crossing' as test,
t_geometry(sdo_geometry('LINESTRING(0 0,1 1,1 0,0 1)',null),0.005,2,1) as tGeom
from dual union all
select 'Line whose start/end points are the same (closed)' as test,
t_geometry(sdo_geometry('LINESTRING(0 0,1 0,1 1,0 1,0 0)',null),0.005,2,1) as tGeom
from dual
)
Select a.test, a.tGeom.ST_Closed() as isSimple
from data a;
TEST ISSIMPLE
------------------------------------------------- --------
Simple 2 point line 1
Line with 4 Points with two segments crossing 0
Line whose start/end points are the same (closed) 1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isEmpty -- Checks if underlying geometry object is empty.
SYNOPSIS
Member Function ST_isEmpty
Return integer Deterministic,
NOTES
Is an implementation of OGC ST_isEmpty method.
cf "POINT EMPTY"/"LINESTRING EMPTY"/"POLYGON EMPTY" OGC
DESCRIPTION
This function checks to see if the underlying object is empty.
While some Spatial Types define empty via WKT string such as 'LINESTRING EMPTY', for oracle
we determine that an sdo_geometry object is Empty if:
1. The object is null;
2. The object exists but all of its 5 attributes (sdo_gtype, sdo_srid, sdo_point, sdo_elem_info, sdo_ordinates) are null.
3. Or the object exists but all of its 3 main geometric attributes (sdo_point, sdo_elem_info, sdo_ordinates) are null.
RESULT
1/0 (integer) -- 1 if Empty, 0 if not.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isOrientedPoint -- A function that tests whether underlying mdsys.sdo_geometry is an oriented point.
SYNOPSIS
Member Function ST_isOrientedPoint
Return integer Deterministic,
DESCRIPTION
Examines underlying point geometry to see if contains oriented points.
Single Oriented Point:
Sdo_Elem_Info = (1,1,1, 3,1,0), SDO_ORDINATE_ARRAY(12,14, 0.3,0.2)));
The Final 1,0 In 3,1,0 Indicates That This Is An Oriented Point.
Multi Oriented Point:
Sdo_Elem_Info_Array(1,1,1, 3,1,0, 5,1,1, 7,1,0), Sdo_Ordinate_Array(12,14, 0.3,0.2, 12,10, -1,-1)));
RESULT
BOOLEAN (Integer) -- 1 if has orientes points.
EXAMPLE
with data as (
select 1 as geomId, T_GEOMETRY(sdo_geometry(2001,null,null,sdo_elem_info_array(1,1,1, 3,1,0), sdo_ordinate_array(12,14, 0.3,0.2)),0.005,2,1) as tgeom
From Dual union all
select 2 as geomId, t_geometry(sdo_geometry('LINESTRING (100.0 0.0, 400.0 0.0)',NULL),0.005,2,1) as tgeom
From Dual Union All
select 3 as geomId, T_GEOMETRY(sdo_geometry(2005,null,null,Sdo_Elem_Info_Array(1,1,1, 3,1,0, 5,1,1, 7,1,0), Sdo_Ordinate_Array(12,14, 0.3,0.2, 12,10, -1,-1)),0.005,2,1) as tgeom
From Dual Union All
select 4 as geomId, T_GEOMETRY(sdo_geometry(2005,null,null,Sdo_Elem_Info_Array(1,1,1, 3,1,0, 5,1,1, 7,1,0, 9,1,1), Sdo_Ordinate_Array(12,14, 0.3,0.2, 12,10, -1,-1, -10,-10)),0.005,2,1) as tgeom
From Dual
)
select a.geomId, a.tgeom.ST_GeometryType() as geomType, a.tgeom.ST_isOrientedPoint() as isOrientedPoint
from data a;
GEOMID GEOMTYPE ISORIENTEDPOINT
------ ------------- ---------------
1 ST_POINT 1
2 ST_LINESTRING 0
3 ST_MULTIPOINT 1
4 ST_MULTIPOINT 1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Dec 2008 - Original coding within GEOM package.
Simon Greener - Jan 2013 - Recoded for T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isSimple -- Checks if underlying geometry object is simple as per the OGC.
SYNOPSIS
Member Function ST_isSimple
Return integer Deterministic,
NOTES
Is an implementation of OGC ST_isSimple method.
DESCRIPTION
This function checks to see if the underlying object is simple.
A simple linestring is one for which none of its segments cross each other.
This is not the same as a closed linestring whose start/end points are the same as in a polygon ring.
This function does this by using the Oracle MDSYS.ST_GEOMETRY.ST_isSimple method.
RESULT
1/0 (integer) -- 1 if Simple, 0 if not.
With data as (
select 'Simple 2 point line' as test,
t_geometry(sdo_geometry('LINESTRING(0 0,1 1)',null),0.005,2,1) as tGeom
from dual union all
select 'Line with 4 Points with two segments crossing' as test,
t_geometry(sdo_geometry('LINESTRING(0 0,1 1,1 0,0 1)',null),0.005,2,1) as tGeom
from dual union all
select 'Line whose start/end points are the same (closed)' as test,
t_geometry(sdo_geometry('LINESTRING(0 0,1 0,1 1,0 1,0 0)',null),0.005,2,1) as tGeom
from dual
)
Select a.test, a.tGeom.ST_isSimple() as isSimple
from data a;
TEST ISSIMPLE
------------------------------------------------- --------
Simple 2 point line 1
Line with 4 Points with two segments crossing 0
Line whose start/end points are the same (closed) 1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isValid -- Executes, and returns, result of mdsys.sdo_geometry method ST_isValid().
SYNOPSIS
Member Function ST_isValid
Return Integer Deterministic,
NOTES
Is an implementation of OGC ST_isValid method.
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.ST_isValid().
See also SDO_GEOM.VALIDATE_GEOMETRY etc.
RESULT
BOOLEAN (Integer) -- If mdsys.sdo_geometry is valid (see SDO_GEOM.VALIDATE_GEOMETRY) returns 1 else 0.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isValidContext -- Executes sdo_geom.validate_geometry_with_context against underlying geometry and returns value.
SYNOPSIS
Member Function ST_isValidContext
Return varchar2 Deterministic,
DESCRIPTION
This function executes the SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT function and returns the result.
RESULT
result (varchar2) -- Returns result of SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT function.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Length -- Returns length of underlying linestring or polygon (rings) sdo_geometry
SYNOPSIS
Member Function ST_Length (
p_unit in varchar2 default NULL,
p_round in integer default 0 )
)
Return Number Deterministic
ARGUMENTS
p_unit (varchar2) - Oracle Unit of Measure eg unit=M.
p_round (integer) - Whether to round result using PRECISION of T_GEOMETRY
DESCRIPTION
This function computes length of linestring or polygon boundary of underlying sdo_geometry.
Result is in the distance units of the SDO_SRID, or in p_units where supplied.
Result is rounded to SELF.PRECISION if p_round is true (1), otherwise false(0) no rounding.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual union all
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',28356),0.0005,3,1) as tgeom From Dual
)
select a.tgeom.ST_Length(case when a.tGeom.ST_Srid() = 28356 then 'unit=CENTIMETER' else null end,0) as length,
a.tgeom.ST_Length(case when a.tGeom.ST_Srid() = 28356 then 'unit=CENTIMETER' else null end,1) as round_length
from data a;
LENGTH ROUND_LENGTH
----------- ------------
30 30
30.44595368 30.446
30 30
8400 8400
NOTES
Length of 3D linestrings and polygons is an Enterprise Spatial feature.
The function detects if licensed and computes length using sdo_geom.sdo_length.
If the database is not licensed, the function computes 3D length itself (slower).
RESULT
length (Number) -- Length in SRID unit of measure or in supplied units (p_unit) possibly rounded to SELF.Precision
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Line2Cogo - Creates Cogo Instructions from linestring segments.
SYNOPSIS
Member Function ST_Line2Cogo
Return &&INSTALL_SCHEMA..T_BEARING_DISTANCES Pipeline,
DESCRIPTION
This function converts the underlying simple linestring to a set of bearings and distances in T_BEARINGS_DISTANCES array format.
The first T_BEARING_DISTANCE element will be the bearing and distance from an implied start point of 0,0.
ARGUMENTS
p_unit (varchar2) - For when SRID <> NULL, an oracle unit of measure eg unit=M.
RESULT
Cogo Instructions - Cogo instructions coded as T_BEARING_DISTANCES array of T_BEARING_DISTANCE
EXAMPLE
-- Create 2D Line from COGO then reverse back to COGO ....
With data as (
select f.line
from (select t_geometry(sdo_geometry(2001,null,sdo_point_type(0.0,3.5,null),null,null),0.005,2,1)
.ST_Cogo2Line (
t_bearing_distances(
t_bearing_distance(180.00,3.50,null),
t_bearing_distance( 90.00,3.50,null),
t_bearing_distance( 0.00,3.50,null),
t_bearing_distance( 43.02,5.43,null),
t_bearing_distance(270.00,9.50,null))
) as line
from dual
) f
)
select COGO.DD2DMS(COGO.ST_Degrees(t.bearing)) as bearing,
Round(t.distance,3) as distance
from data a,
table(a.line.ST_Line2Cogo()) t;
BEARING DISTANCE
-------- --------
0°0'0" 3.5
180°0'0" 3.5
90°0'0" 3.5
0°0'0" 3.5
43°1'12" 5.43
270°0'0" 9.5
6 rows selected
-- Create 3D Line from COGO then reverse back to COGO ....
With data as (
select f.line
from (select t_geometry(sdo_geometry(3001,null,sdo_point_type(0.0,3.5,0.2),null,null),0.005,2,1)
.ST_Cogo2Line (
t_bearing_distances(
t_bearing_distance(180.00,3.50,1.1),
t_bearing_distance( 90.00,3.50,2.0),
t_bearing_distance( 0.00,3.50,3.0),
t_bearing_distance( 43.02,5.43,4.4),
t_bearing_distance(270.00,9.50,5.2))
) as line
from dual
) f
)
select COGO.DD2DMS(COGO.ST_Degrees(t.bearing)) as bearing,
Round(t.distance,3) as distance,
t.z
from data a,
table(a.line.ST_Line2Cogo()) t;
BEARING DISTANCE Z
-------- -------- ---
0°0'0" 3.506 0.2
180°0'0" 3.614 1.1
90°0'0" 3.614 2
0°0'0" 3.64 3
43°1'12" 5.608 4.4
270°0'0" 9.534 5.2
6 rows selected
NOTE
Measures not supported: see LRS functions.
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LineShift -- Moves linestring parallel to imaginary line drawnn from first to last vertex.
SYNOPSIS
Member Function ST_LineShift(p_distance in number)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
Function that extracts the first and last vertex of a linestring, compute a single offset at right angles to an
imaginary line from first to last vertex, then apply offset to all vertices in the linestring.
Is a "simple" version of the more complex ST_Parallel.
ARGUMENTS
p_distance (Number) - Value +/- integer value.
NOTES
Only supports linestrings.
TODO
Add support for SRID units of measure (ie parameter p_unit).
RESULT
geometry (T_GEOMETRY) -- Input linestring moved parallel by p_distance units
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2008 - Original coding in GEOM package.
Simon Greener - January 2013 - Port/Rewrite to T_GEOMETRY object function member.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Add_Measure -- Adds measures to 2D (multi)linestring.
SYNOPSIS
Member Function ST_LRS_Add_Measure(p_start_measure IN Number Default NULL,
p_end_measure IN Number Default NULL,
p_unit IN VarChar2 Default NULL)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Takes a 2D geometry and assigns supplied measures to the start/end vertices
and adds proportioned measure values to all vertices in between.
ARGUMENTS
p_start_measure (Number) - Measure defining start point for geometry.
p_end_measure (Number) - Measure defining end point for geometry.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
geometry (T_GEOMETRY) -- Measured geometry
EXAMPLE
select t_geometry(SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)),
0.0005,3,1)
.ST_LRS_ADD_Measure(110.0)
.ST_Round(3,3,1,2)
.geom as mGeom
from dual;
MGEOM
---------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3302,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Concatenate -- Rescales geometry measures and optionally offsets them, stretching the geometry.
SYNOPSIS
Member Function ST_LRS_Concatenate(p_lrs_segment IN mdsys.sdo_geometry)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
This function appends the provided lrs segment to the SELF.
Ensures measures are updated.
ARGUMENTS
p_lrs_segment (MDSYS.SDO_GEOMETRY) - LRS Linestring.
RETURN
concatenated linestring (T_GEOMETRY)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2017 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Dim -- Tests underlying mdsys.sdo_geometry to see if coordinates include a measure ordinate and returns measure ordinate's position.
SYNOPSIS
Member Function ST_Lrs_Dim
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc) measure ordinate position (L) and returns it.
RESULT
BOOLEAN (Integer) -- L from DLNN.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_End_Measure -- Returns M value of last vertex in measured geometry.
SYNOPSIS
Member Function ST_LRS_End_Measure
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Returns end measure associated with last vertex in a measured line-string.
If the line-string is not measured it returns the length of the linestring.
ARGUMENTS
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
measure (Number) - Measure value of first vertex in a measured line-string: 0 if not measured.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Find_Measure -- Snaps input point to measured linestring returning measure value(s)
SYNOPSIS
Member Function ST_LRS_Find_Measure(p_geom in mdsys.sdo_geometry,
p_measureN in integer default 1,
p_unit in varchar2 default null)
Return mdsys.sdo_ordinate_array Deterministic,
DESCRIPTION
Given a point near a measured linestring, this function returns the measures
of all lines that have same distance to the linestring.
ARGUMENTS
p_geom (MDSYS.SDO_GEOMETRY) - Geometry for which a measure is needed.
p_measureN (Integer) - Particular measure to be returned. 0 = all possible measures, 1 is the first etc.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
measure (MDSYS.SDO_ORDINATE_ARRAY) -- All measures where more than one is closest to line.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Find_MeasureN -- Returns nominated measure nearest to supplied point if it exists.
SYNOPSIS
Member Function ST_LRS_Find_MeasureN(p_geom in mdsys.sdo_geometry,
p_measureN in integer default 1,
p_unit in varchar2 default null)
Return mdsys.sdo_ordinate_array Deterministic,
DESCRIPTION
Given a point near a measured linestring, this function returns the nominated
measure nearest to that point if it exists. For example, requesting p_measureN=2
may return NULL if only one measure exists that is closest to the linestring at some point.
ARGUMENTS
p_geom (MDSYS.SDO_GEOMETRY) - Geometry for which a measure is needed.
p_measureN (Integer) - Particular measure to be returned. 1..AllPossibleMeasures
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
measure (Number) - First measure on line closest to point.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Find_Offset -- Returns smallest (perpendicular) offset from supplied point to the linestring.
SYNOPSIS
Member Function ST_LRS_Find_Offset(p_geom in mdsys.sdo_geometry,
p_unit in varchar2 default null)
Return Number Deterministic,
DESCRIPTION
Given a point this function returns the smallest (perpendicular) offset from
the point to the line-string.
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - Point geometry for which a measure is needed.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
offset (Number) - Perpendicular offset distance from point to nearest point on line.
Value is negative if on left of line; positive if on right.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Get_Measure -- The function returns the measure of the T_GEOMETRY point object.
SYNOPSIS
Member Function ST_LRS_Get_Measure
Return number deterministic,
DESCRIPTION
Returns the measure value of a measured point.
If point 3301, the value of the Z attribute is returned etc.
RESULT
Measure Value (Number) - Measure value of point (ie 3301, 4301, 4401). If n001 returns NULL.
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Intersection -- Intersects input geometry against measured linestring.
SYNOPSIS
Member Function ST_LRS_Intersection(P_GEOM In Mdsys.Sdo_Geometry,
P_unit in varchar2 default null)
Return t_geometry Deterministic,
DESCRIPTION
Takes as input a linestring, multi-linestring, polygon, MultiPolygon or point.
SELF must be a measured linestring.
ARGUMENTS
p_geom (mdsys.sdo_geometry) - Geometry for which a intersection calculation is needed.
p_unit (VarChar2) - Oracle Unit of Measure eg unit=M.
RESULT
Geometry (T_GEOMETRY) - Measured Linestring or point
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jul 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Is_Measure_Decreasing -- Checks if M values decrease in value over all of the linestring.
SYNOPSIS
Member Function ST_LRS_Is_Measure_Decreasing
Return varchar2 deterministic,
DESCRIPTION
Checks all measures of all vertices in a linestring from start to end.
Computes difference between each pair of measures. If all measure differences
decrease then TRUE is returned, otherwise FALSE. For non-measured line-strings
the value is always FALSE.
RESULT
True/False (VarChar2) - TRUE if measures are decreasing, FALSE otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Is_Measure_Increasing -- Checks if M values increase in value over all of the linestring.
SYNOPSIS
Member Function ST_LRS_Is_Measure_Increasing
Return varchar2 deterministic,
DESCRIPTION
Checks all measures of all vertices in a linestring from start to end.
Computes difference between each pair of measures. If all measure differences
increase then TRUE is returned, otherwise FALSE. For non-measured line-strings
the value is always TRUE.
RESULT
True/False (VarChar2) -- TRUE if measures are increasing, FALSE otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Is_Shape_Pt_Measure -- Checks if M value is associated with a vertex.
SYNOPSIS
Member Function ST_LRS_Is_Shape_Pt_Measure(p_measure in number)
Return varchar2 deterministic,
DESCRIPTION
Checks all measures of all vertices in a linestring from start to end to see
if a measure on a shape vertex has the same measure value as p_measure.
Uses measure increasing/decreasing to avoid having to test all vertices in linestring.
RESULT
True/False (VarChar2) -- TRUE if measure exists at a shape vertex.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2017 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_isMeasured -- Tests geometry to see if coordinates include a measure.
SYNOPSIS
Member Function ST_LRS_isMeasured
Return Integer Deterministic,
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GType() as sdo_gtype,
a.tgeom.ST_GeometryType() as geomType,
a.tgeom.ST_CoordDimension() as coordDim,
a.tgeom.ST_LRS_isMeasured() as isMeasured
from data a;
SDO_GTYPE GEOMTYPE COORDDIM isMeasured
--------- -------------- -------- ----------
2 ST_LINESTRING 2 0
2 ST_LINESTRING 3 0
2 ST_LINESTRING 3 1
DESCRIPTION
Examines SDO_GTYPE (DLNN etc) to see if sdo_gtype has measure ordinate eg 3302 not 3002.
RESULT
BOOLEAN (Integer) -- 1 is measure ordinate exists, 0 otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Locate_Along -- Wrapper over ST_LRS_Locate_Measure
SYNOPSIS
Member Function ST_LRS_Locate_Along(p_measure in number,
p_offset in number default 0,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
ARGUMENTS
p_measure (Number) - Measure defining point to be located.
p_offset (Number) - Offset value left (negative) or right (positive) in p_units.
p_unit (VarChar2) - Unit of measure for distance calculations when defining snap point
RESULT
point (T_GEOMETRY) - Point at measure/offset.
SEE ALSO
ST_Locate_Measure(p_measure in number, ...)
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Locate_Between -- Converts supplied measures into single point or linestring.
DESCRIPTION
Wrapper over ST_LRS_Locate_Between
ARGUMENTS
p_start_measure (Number) - Measure defining start point of located geometry.
p_end_measure (Number) - Measure defining end point of located geometry.
p_offset (Number) - Offset value left (negative) or right (positive) in p_units.
p_unit (VarChar2) - Unit of measure for distance calculations when defining snap point
RESULT
point (T_GEOMETRY) - Point or Line between start/end measure with offset.
SEE ALSO
ST_Locate_Measures(p_start_measure in number, ...)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Locate_Measure -- Returns point geometry at supplied measure along linestring.
SYNOPSIS
Member Function ST_LRS_Locate_Measure (p_measure in number,
p_offset in number default 0,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Given a measure or length, this function returns a mdsys.sdo_geometry point
at that measure or offset the supplied amount.
NOTES
Handles line-strings with reversed measures.
ARGUMENTS
p_measure (Number) - Measure defining point to be located.
p_offset (Number) - Offset value left (negative) or right (positive) in p_units.
p_unit (VarChar2) - Unit of measure for distance calculations when defining snap point
RESULT
point (T_GEOMETRY) - Point at measure/offset.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Locate_Measures -- Converts supplied measures into single point or linestring.
SYNOPSIS
Member Function ST_LRS_Locate_Measures(p_start_measure in number,
p_end_measure in number,
p_offset in number default 0,
p_unit varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Given two measures or lengths, this function returns the point defined by
those measure (if equal) or a line-string if not. The geometry may be offset
the supplied amount.
NOTES
Currently does not handle line-strings with reversed measures.
ARGUMENTS
p_start_measure (Number) - Measure defining start point of located geometry.
p_end_measure (Number) - Measure defining end point of located geometry.
p_offset (Number) - Offset value left (negative) or right (positive) in p_units.
p_unit (VarChar2) - Unit of measure for distance calculations when defining snap point
RESULT
point (T_GEOMETRY) - Point at measure/offset.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Locate_Point -- Wrapper over ST_LRS_Locate_Measure
SYNOPSIS
Member Function ST_LRS_Locate_Point (p_measure in number,
p_offset in number default 0)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Given a measure or length, this function returns a mdsys.sdo_geometry point
at that measure or offset the supplied amount.
NOTES
Handles line-strings with reversed measures.
ARGUMENTS
p_measure (Number) - Measure defining point to be located.
p_offset (Number) - Offset value left (negative) or right (positive) in p_units.
RESULT
point (T_GEOMETRY) - Point at measure/offset.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2017 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Measure_Range -- Returns Last Vertex M Value - First Vertex M Value.
SYNOPSIS
Member Function ST_LRS_Measure_Range(p_unit in varchar2 default null)
Return Number deterministic,
DESCRIPTION
Returns end vertex measure value - start vertex measure value.
If line-string not measured, returns length of line.
ARGUMENTS
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
measure (Number) -- Measure range for measured line-string: length if not measured.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Measure_To_Percentage -- Converts supplied M value to percentage of M range.
SYNOPSIS
Member Function ST_LRS_Measure_To_Percentage(p_measure IN Number DEFAULT 0,
p_unit in varchar2 default null)
Return Number deterministic,
DESCRIPTION
The end measure minus the start measure of a measured line-string defines
the range of the measures (see ST_Measure_Range). The supplied measure is
divided by this range and multiplied by 100 to return the measure as a percentage.
For non measured line-strings all values are computed using lengths.
ARGUMENTS
p_percentage (Number) - Value between 0 and 100
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
Percentage (Number) - Value between 0 and 100.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Percentage_To_Measure -- Converts supplied Percentage value to Measure.
SYNOPSIS
Member Function ST_LRS_Percentage_To_Measure(p_percentage IN Number DEFAULT 0,
p_unit in varchar2 default null)
Return Number deterministic,
DESCRIPTION
The supplied percentage value (between 0 and 100) is multipled by
the measure range (see ST_Measure_Range) to return a measure value between
the start and end measures. For non measured line-strings all values are
computed using lengths.
ARGUMENTS
p_percentage (Number) - Value between 0 and 100
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
Measure (Number) - Value between Start Measure and End Measure.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Project_Point -- The function uses ST_Snap to snap a point to a linestring(2002) or multi-linestring (2006).
SYNOPSIS
Member Function ST_LRS_Project_Point(P_Point In Mdsys.Sdo_Geometry,
p_unit In varchar2 Default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
This is a wrapper function for ST_Snap. The function uses ST_Snap to snap a point
to a linestring(2002) or multi-linestring (2006).
However, where ST_Snap may return more than one result point if p_point was
equidistant from two separate segments/segments of the line-string, ST_Project_Point
returns the first.
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - A point(2001) mdsys.sdo_geometry object describing the point for splitting the linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
snapped_points (T_GEOMETRIES) -- One or more points where supplied point has snapped to the linestring.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Reset_Measure -- Wipes all existing assigned measures.
SYNOPSIS
Member Function ST_LRS_Reset_Measure
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Sets all measures of a measured linesting to null values leaving sdo_gtype
alone. So, 3302 remains 3302, but all measures are set to NULL eg
Coord 2 of 10.23,5.75,2.65 => 10.23,5.75,NULL
NOTES
This is not the same as ST_To2D which removes measures etc and returns a pure 2D (200x object).
RESULT
linestring (T_GEOMETRY) -- All measures reset
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Reverse_Measure -- Reverses vertices measures: first becomes last, second becomes second last etc.
SYNOPSIS
Member Function ST_LRS_Reverse_Measure
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Reverses vertices measures: first becomes last, second becomes second last etc.
This is not the same as ST_Reverse_Linestring which reverses xy direction of whole linestring.
RESULT
linestring (T_GEOMETRY) - All measures reversed
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Scale_Measures -- Rescales geometry measures and optionally offsets them, stretching the geometry.
SYNOPSIS
Member Function ST_LRS_Scale_Measures
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
This function can redistribute measure values between the supplied
p_start_measure (start vertex) and p_end_measure (end vertex) by adjusting/scaling
the measure values of all in between coordinates. In addition, if p_shift_measure
is not 0 (zero), the supplied value is added to each modified measure value
performing a translation/shift of those values.
ARGUMENTS
p_start_measure (Number) - Measure defining start point for geometry.
p_end_measure (Number) - Measure defining end point for geometry.
p_shift_measure (Number) - Unit of measure for distance calculations.
RETURN
linestring (T_GEOMETRY) - All measures scales.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Start_Measure -- Returns M value of first vertex in measured geometry.
SYNOPSIS
Member Function ST_LRS_Start_Measure
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Returns start measure associated with first vertex in a measured line-string.
If the line-string is not measured it returns 0.
RESULT
measure (Number) -- Measure value of first vertex in a measured line-string: 0 if 2D.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Update_Measures -- Updates existing measures.
SYNOPSIS
Member Function ST_LRS_Update_Measures(p_start_measure IN Number,
p_end_measure IN Number,
p_unit IN VarChar2 Default NULL)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Takes an existing measured linestring and updates all measures based on segment length/total length ratios.
NOTES
Does not currently handle circular arc segments
ARGUMENTS
p_start_measure (Number) - Measure defining start point for geometry.
p_end_measure (Number) - Measure defining end point for geometry.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
geometry (T_GEOMETRY) -- Measured geometry
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2017 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Valid_Geometry -- Checks if underlying LRS linestring is valid.
SYNOPSIS
Member Function ST_LRS_Valid_Geometry(p_diminfo in mdsys.sdo_dim_array)
Return varchar2 Deterministic,
DESCRIPTION
Function returns TRUE string if underlying linestring is a valid LRS linestring and FALSE otherwise.
The supplied SDO_DIM_ARRAY must have measure information with a SDO_DIMNAME of M (uppercase)
This function checks that the geometry type is measured eg 3302 and has the right number of dimensions (dL0N)
The function also checks that sdo_ordinate array has measure values within the range of the supplied diminfo structure.
ARGUMENTS
p_diminfo (mdsys.sdo_dim_array) - DIMINFO structure with a measure sdo_dim_element
TODO
Current implementation does NOT examine the supplied diminfo array.
RESULT
TRUE/FASE (string) - TRUE if LRS linestring is Valid, FALSE otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Valid_Measure -- Checks if supplied measure falls within the linestring's measure range.
SYNOPSIS
Member Function ST_LRS_Valid_Measure(p_measure in number)
Return varchar2 Deterministic,
DESCRIPTION
Function returns TRUE string if measure falls within the underlying linestring's measure range
or the FALSE string if the supplied measure does not fall within the measure range.
ARGUMENTS
p_measure (number) - Measure value.
RESULT
TRUE/FASE (string) - TRUE if measure within range, FALSE otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Valid_Point -- Checks if underlying LRS point is valid.
SYNOPSIS
Member Function ST_LRS_Valid_Point(p_diminfo in mdsys.sdo_dim_array)
Return varchar2 Deterministic,
DESCRIPTION
Function returns TRUE string if point is valid and FALSE if point is not valid.
A valid LRS point has measure information. It is checkeds for the geometry type
(point) and the number of dimensions.
The Oracle equivalent for this function requires that "All LRS point data must be
stored in the SDO_ELEM_INFO_ARRAY and SDO_ORDINATE_ARRAY, and cannot be stored in
the SDO_POINT field in the SDO_GEOMETRY definition of the point", however, this
implementation allows for the storage of 3301 Points within the SDO_POINT_TYPE structure.
ARGUMENTS
p_diminfo (mdsys.sdo_dim_array) - DIMINFO structure with a measure sdo_dim_element
TODO
Current implementation does NOT examine the supplied diminfo array.
RESULT
TRUE/FASE (string) - TRUE if LRS POint is Valid, FALSE otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_LRS_Valid_Segment -- Checks if underlying LRS linestring is valid.
SYNOPSIS
Member Function ST_LRS_Valid_Segment(p_diminfo in mdsys.sdo_dim_array)
Return varchar2 Deterministic,
DESCRIPTION
Function returns TRUE string if underlying linestring is a valid LRS linestring and FALSE otherwise.
The supplied SDO_DIM_ARRAY must have measure information with a SDO_DIMNAME of M (uppercase)
This function only checks that the geometry type is measured eg 3302 and the linestring dims (dL0N)
ARGUMENTS
p_diminfo (mdsys.sdo_dim_array) - DIMINFO structure with a measure sdo_dim_element
TODO
Current implementation does NOT examine the supplied diminfo array.
RESULT
TRUE/FASE (string) - TRUE if LRS linestring is Valid, FALSE otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_MBR - Returns lower left and upper right coordinates of underlying geometry's minimum bounding rectangle (MBR).
SYNOPSIS
Member Function ST_MBR
Return T_GEOMETRY Determinsitic
EXAMPLE
select T_Geometry(sdo_geometry('LINESTRING(0 0,0.1 0.1,0.5 0.5,0.8 0.8,1 1)',NULL),0.005,2,1).ST_MBR().geom as mbrGeom
from dual;
MBRGEOM
--------------------------------------------------------------------------------------
SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(0,0,1,1))
DESCRIPTION
Supplied with a non-NULL geometry, this function returns the envelope or minimum bounding rectangle as a polygon geometry with one optimized rectangle exterior ring.
RESULT
MBR Geometry (T_GEOMETRY) -- Single Polygon with Optimized Rectangle Exterior Ring.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2011 - Converted to T_GEOMETRY from GEOM package.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Multi -- Converts any single sdo_geometry (point, line or polygon) to its multi equivalent (multipoint, multiline, multipolygon).
SYNOPSIS
Member Function ST_Multi ()
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
RESULT
MultiGeometry (T_GEOMETRY) -- If not already a multi geometry, returns multi-geometry object with 1 geometry;
DESCRIPTION
Converts underlying sdo_geometry objects that are single geometries (eg sdo_gtype of X001, X002, X003) to its multi equivalent (X005,X006,X007).
Note that what is returned is a multi geometry with a one internal geometry.
EXAMPLE
With Data as (
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1,11,2003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0, 5,5,5,10,10,10,10,5,5,5)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),
((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select case when a.tgeom.ST_GType() = 1 -- ST_AsText() converts 2005 with one point to POINT()
then a.tgeom.ST_Multi().ST_AsTText()
else a.tgeom.ST_Multi().ST_AsText()
end as mGeom
from data a;
MGEOM
--------------------------------------------------------------------------------------------------------------
&&INSTALL_SCHEMA..T_GEOMETRY(SDO_GEOMETRY(2005,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(0,0)); TOLERANCE(05)
MULTILINESTRING ((0 0, 10 0, 10 5, 10 10, 5 10, 5 5))
MULTILINESTRING ((-1 -1, 0 -1), (0 0, 10 0, 10 5, 10 10, 5 10, 5 5))
MULTIPOLYGON (((0 0, 20 0, 20 20, 0 20, 0 0)))
MULTIPOLYGON (((0 0, 20 0, 20 20, 0 20, 0 0)), ((10 10, 10 11, 11 11, 11 10, 10 10)))
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Multi_Centroid -- Computes centroid for all parts of supplied multilinestring or multipolygon.
SYNOPSIS
Member Function ST_Multi_Centroid(
p_method IN integer := 1,
p_unit IN varchar2 := NULL
)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic;
DESCRIPTION
For an underlying MultiPolygon this function creates a single centroid for each polygon in it, returning a MultiPoint geometry object.
For a MultiPolygon this function calls ST_Centroid_A with only the following p_method values:
0 = Use average of all Area's X Ordinates for starting centroid Calculation
10 = Use average of all Area's Y Ordinates for starting centroid Calculation
1 = Use centre X Ordinate of geometry MBR
11 = Use centre Y Ordinate of geometry MBR
3 = Use MDSYS.SDO_GEOM.SDO_CENTROID function
4 = Use MDSYS.SDO_GEOM.SDO_POINTONSURFACE function.
For an underlying MultiLineString this function creates a single centroid for each linestring in it, returning a MultiPoint geometry object.
For a MultiLineString this function calls ST_Centroid_L with the p_option set to 'MULTI'.
Since ST_Centroid_L can take a p_unit value, it is exposed in this function.
RESULT
multipoint (T_GEOMETRY) - Centroids of all parts of the supplied MultiPolygon/MultiLineString object.
EXAMPLE
-- MultiCentroid for MultiPolygon
with data as (
select t_geometry (
SDO_GEOMETRY(2007,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1003,1,11,1003,1),
SDO_ORDINATE_ARRAY(0,0,100,0,100,100,0,100,0,0,1000,1000,1100,1000,1100,1100,1000,1100,1000,1000.0)),
0.005,2,1)
as tGeom
from dual
)
select a.tGeom
.ST_Multi_Centroid(p_method => 0)
.ST_AsText() as mCentroid
from data a;
MCENTROID
---------------------------------
MULTIPOINT ((40 50), (1040 1050))
-- MutiCentroid for MultiLineString
with data as (
select t_geometry (
SDO_GEOMETRY(2006,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1,11,2,1),
SDO_ORDINATE_ARRAY(0,0,100,0,100,100,0,100,0,0,1000,1000,1100,1000,1100,1100,1000,1100,1000,1000.0)),
0.005,2,1)
as tGeom
from dual
)
select a.tGeom
.ST_Multi_Centroid()
.ST_AsText() as mCentroid
from data a;
MCENTROID
-----------------------------------
MULTIPOINT ((100 100), (1100 1100))
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2006 - Original coding.
Simon Greener - January 2012 - Added p_seed_x support.
Simon Greener - August 2018 - Added to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumElementInfo -- Returns number of SDO_ELEM_INFO triplets that describe geometry.
SYNOPSIS
Member Function ST_NumElementInfo
Return Integer deterministic
DESCRIPTION
If a geometry is coded with an SDO_ELEM_INFO_ARRAY this function will count the number of triplets that describe the geometry.
For Example:
1. sdo_geometry(2002,null,null,sdo_element_info_array(1,2,1),sdo_ordinate_array(0,0,1,1)) is described by 1 triplet.
2. sdo_geometry(2003,null,null,sdo_element_info_array(1,1003,1,9,2003,1),sdo_ordinate_array(....)) is described by 2 triplets.
EXAMPLE
With GEOMETRIES As (
Select T_GEOMETRY(sdo_geometry(2007,NULL,NULL,sdo_elem_info_array (1,1005,2, 1,2,1, 7,2,2,13,1003,3),
sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128, 0,0, 10,10)),0.005,3,1) as TGEOM
From Dual Union All
Select T_GEOMETRY(sdo_geometry(2002,NULL,NULL,sdo_elem_info_array (1,4,3, 1,2,1, 3,2,2, 7,2,1),
sdo_ordinate_array (10,45, 20,45, 23,48, 20,51, 10,51)),0.005,3,1) as TGEOM
From Dual
)
Select a.TGEOM.ST_NumElementInfo() as NumElementInfoTriplets
From GEOMETRIES a;
RESULT
Number of sdo_elem_info triplets (Integer)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2006 - Original coding in GEOM package.
Simon Greener - Jan 2013 - Port to T_GEOMETRY object.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumELems -- Returns number of top level elements of the underlying mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_NumElements()
Return Number Deterministic
DESCRIPTION
Wrapper over SDO_UTIL.GETNUMELEM().
EXAMPLE
With GEOMETRIES As (
Select T_GEOMETRY(
mdsys.sdo_geometry(2007,NULL,NULL,mdsys.sdo_elem_info_array (1,1005,2, 1,2,1, 7,2,2,13,1003,3),
mdsys.sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128, 0,0, 10,10)),0.005,3,1) as TGEOM
From Dual Union All
Select T_GEOMETRY(
mdsys.sdo_geometry(2002,NULL,NULL,mdsys.sdo_elem_info_array (1,4,3, 1,2,1, 3,2,2, 7,2,1),
mdsys.sdo_ordinate_array (10,45, 20,45, 23,48, 20,51, 10,51)),0.005,3,1) as TGEOM
From Dual
)
Select a.TGEOM.ST_NumElements() as NumElements
From GEOMETRIES a;
NUMELEM
-------
2
1
RESULT
Required Element Count (Integer)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2006 - Original coding in GEOM package.
Simon Greener - Jan 2013 - Port to T_GEOMETRY object.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumGeometries -- Returns number of top level geometry elements in underlying mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_NumGeometries()
Return Integer Deterministic,
DESCRIPTION
This function is a wrapper over MdSys.SDO_Util.getNumElem().
Returns number of geometry elements (eg LineString in MultiLineString) that describe the underlying mdsys.sdo_geometry.
NOTES
Is an implementation of OGC ST_NumGeometies method.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_NumGeometries() as numGeometries
from data a;
NUMGEOMETRIES
-------------
2
RESULT
number of geometries (Integer) -- For example, if Point(2001), returns 1.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumInteriorRing -- Returns number of interior rings in underlying polygon mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_NumInteriorRing()
Return Integer Deterministic,
DESCRIPTION
This function computes the number of interior rings by processing the sdo_elem_info array in the underlying sdo_geometry object.
Returns number of inner ring elements of a polygon or multipolygon.
NOTES
Is an implementation of OGC ST_NumInteriorRing method.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_NumInteriorRing() as NumInteriorRings
from data a;
NUMINTERIORRINGS
----------------
2
RESULT
Number of interior rings (Integer) -- For example, if Polygon with 1 exterior and 1 interior ring then 1 is returned.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumPoints -- Returns number of points (coordinates) in underlying mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_NumPoints()
Return Integer Deterministic,
DESCRIPTION
This function is the same as ST_NumVertices.
It is implemented using the MdSys.SDO_Util.GetNumVertices() function.
The function returns number of points (coordinates) that describe the underlying mdsys.sdo_geometry.
NOTES
Is an implementation of OGC ST_NumPoints method.
EXAMPLE
With Geometries As (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as TPolygon
From Dual
)
select a.TPolygon.ST_NumPoints() as NumPoints
from GEOMETRIES a;
NUMPOINTS
---------
15
RESULT
number of points (Integer) -- For example, if Point(2001), returns 1.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumRectangles -- A function that returns the number of optimized rectangles in the underlying (multi)polygon geometry.
SYNOPSIS
Member Function ST_NumRectangles
Return integer Deterministic,
DESCRIPTION
Examines sdo_elem_info ETYPE/Interpretation elements to count the number of optimized rectangles it finds.
eg SDO_ELEM_INFO_ARRAY(1,1003,3) ie the interpretation value of 3 means optimized rectangle.
RESULT
Count (integer) -- 0 if no optimized rectangles, n where n > 0 if optimized rectangles found.
EXAMPLE
with data as (
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0))',null),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(0,0,20,20)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(0,0,20,20, 10,10,15,15)),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_NumRectangles() as numRectangles
from data a;
NUMRECTANGLES
-------------
0
1
2
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jun 2011 - Original coding for GEOM package.
Simon Greener - Jan 2013 - Recoded for T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumRings -- Returns Number of Rings of specified type in a polygon/mutlipolygon.
SYNOPSIS
Member Function ST_NumRings (
p_ring_type in integer default 0
)
Return integer Deterministic,
DESCRIPTION
A polygon can have a single outer ring with no inner rings (holes) or it can have holes.
A multipolygon can have multiple outer rings each with/without inner rings.
This method counts the number of rings of the desired type as defined by the input parameter.
ARGUMENTS
p_ring_type : integer : 0 - Count all (inner and outer) rings; 1 Count only outer rings; 2 - Count only inner rings.
RESULT
Number Of Rings (Integer)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Dec 2008 - Original coding for GEOM package.
Simon Greener - Jan 2013 - Port to T_GEOMETRY object.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumSegments -- Returns number of two-point segments in the underlying linear or polygon geometry.
SYNOPSIS
Member Function ST_NumSegments()
Return Integer Deterministic,
DESCRIPTION
Returns number of two-point segments of a polygon or multipolygon.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('MULTILINESTRING((-1 -1, 0 -1),(0 0,10 0,10 5,10 10,5 10,5 5))',null),0.005,3,1) as tgeom From Dual union all
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom From Dual union all
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GeometryType() as gType,
a.tGeom.ST_NumGeometries() as numGeoms,
a.tGeom.ST_NumInteriorRing() as numIRings,
a.tgeom.ST_NumPoints() as numPoints,
a.tgeom.ST_NumSegments() as NumSegments
from data a;
GTYPE NUMGEOMS NUMIRINGS NUMPOINTS NUMSEGMENTS
------------------- -------- ---------- ---------- -----------
ST_LINESTRING 1 0 6 5
ST_MULTILINESTRING 2 0 8 6
ST_POLYGON 1 1 10 8
ST_MULTIPOLYGON 2 0 10 8
ST_MULTIPOLYGON 2 2 20 16
RESULT
Number of 2-point segments (Integer) -- For example, if LINESTRING has 6 vertices it has 5 segments.
TODO
Support for CircularString elements.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Sept 2015 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumSubElements -- Interprets underlying mdsys.sdo_geometry's SDO_ELEM_INFO array returning either total count of elements or just underlying sub-elements.
SYNOPSIS
Member Function ST_NumSubElements(p_subArcs in integer default 0)
Return Number Deterministic
DESCRIPTION
If a geometry is coded with an SDO_ELEM_INFO_ARRAY this function will examine the triplets that describe
each element and returns one of counts depending on the input parameter.
If the input parameter is 0 all elements are counted: For example is a single polygon has a single outer ring (1),
but that ring is coded with vertex-connected and circular-arc segments (2), then 1 + 2 =3 is returned.
If 1 is the supplied input only the number of sub-elements that describe the outer ring are counted and returned.
EXAMPLE
With geometries as (
select t_geometry(sdo_geometry(2003,null,null,
sdo_elem_info_array (1,1005,2, 1,2,1, 7,2,2),
sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128)),
0.005,3,1) as tgeom
from dual
union all
select t_geometry(sdo_geometry(2002,null,null,
sdo_elem_info_array (1,4,3, 1,2,1, 3,2,2, 7,2,1),
sdo_ordinate_array (10,45, 20,45, 23,48, 20,51, 10,51)),
0.005,3,1) as tgeom
from dual
)
select a.tgeom.ST_GType() as gType,
a.tgeom.ST_NumSubElements(0) as allElems,
a.tgeom.ST_NumSubElements(1) as lowElems,
a.tgeom.ST_NumSubElements(0) - a.tgeom.ST_NumSubElements(1) as TopElems
from geometries a;
GTYPE ALLELEMS LOWELEMS TOPELEMS
---------- ---------- ---------- ----------
3 3 2 1
2 4 3 1
RESULT
Required Element Count (Integer)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2006 - Original coding in GEOM package.
Simon Greener - Jan 2013 - Port to T_GEOMETRY object.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_NumVertices -- Returns number of vertices (coordinates) in underlying mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_NumVertices()
Return Integer Deterministic,
DESCRIPTION
This function is a wrapper over MdSys.SDO_Util.GetNumVertices(). Returns number of vertices (coordinates) that describe the underlying mdsys.sdo_geometry.
EXAMPLE
With Geometries As (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as TPolygon
From Dual
)
select a.TPolygon.ST_NumVertices() as numVertices
from GEOMETRIES a;
NUMVERTICES
-----------
15
RESULT
number of vertices (Integer) -- For example, if Point(2001), returns 1.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_OneSidedBuffer -- Creates a square buffer to left or right of a linestring.
SYNOPSIS
Member Function ST_OneSidedBuffer(p_distance in number,
p_curved in number default 0,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function creates a square buffer to left or right of a linestring.
ARGUMENTS
p_distance (Number) - if < 0 then left side buffer; if > 0 then right sided buffer.
p_curved (Number) - 0 = no; 1 = yes for angles in linestring (See ST_Parallel)
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
polygon (T_GEOMETRY) - Result of one sided buffering of a linestring.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Ord2SdoPoint -- Changes point encoding from SDO_ELEM_INFO_ARRAY/SDO_ORDINATE_ARRAY to SDO_POINT_TYPE.
SYNOPSIS
Function ST_Ord2SdoPoint
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
Converts underlying point encoded in SDO_ELEM_INFO_ARRAY/SDO_ORDINATE_ARRAY
elements to one encoded in SDO_POINT_TYPE element.
Gives precidence to measure where exists and point is 4D.
RESULT
SELF (TO_GEOMETRY) -- Original Point with structure changed.
EXAMPLE
select &&INSTALL_SCHEMA..T_Geometry(SDO_GEOMETRY(2005, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(10.719, 8.644)),0.005,3,1)
.ST_Ord2SdoPoint()
.geom as geom
from dual;
GEOM
-------------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(10.719, 8.644, NULL), NULL, NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener, Jul 2017 - New Method.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Ordinates_Equal -- Compares current object (SELF) geometry's GEOM.sdo_ordinates with supplied mdsys.sdo_ordinate_array
SYNOPSIS
Member Function ST_Ordinates_Equal(p_ordinates in mdsys.sdo_ordinate_array,
p_z_precision in integer default 2,
p_m_precision in integer default 3)
Return Integer deterministic
DESCRIPTION
This function compares current t_geometry object' SELF.GEOM.SDO_ORDINATES object to supplied p_ordinates.
Result can be one of the following:
0 if one or other sdo_ordinates structures are null but not both.
1 if two non-null structures and all ordinates are equal;
-1 if sdo_ordinates's X/Y/Z/M ordinates not equal
ARGUMENTS
p_ordinates (sdo_ordinate_array) -- p_ordinate that is to be compared to current object geometry's SELF.GEOM.Sdo_Ordinate_Array element.
p_z_precision (integer) -- Z Ordinate precision for comparison using ROUND
p_m_precision (integer) -- M Ordinate precision for comparison using ROUND
RESULT
-1,0,1 (Integer) -- 0 if one or other sdo_ordinates structure is null but not both.
-- 1 if two non-null structures and all ordinates are equal;
-- -1 if any of the sdo_ordinates's X/Y/Z/M ordinates not equal.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Parallel -- Moves linestring parts of underlying Geometry left (-ve) or right (+ve) depending of distance value.
SYNOPSIS
Member Function ST_Parallel(p_offset in number,
p_curved in number default 0,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
Function that moves the linestring components of the underlying mdsys.sdo_geometry left/right by a fixed amount.
Bends in the linestring, when moved, can remain vertex-connected or be converted to curves.
Does not handle situations where supplied distance results in a segment disappearing.
ARGUMENTS
p_offset (Number) - Value +/- integer value.
p_curved (Integer) - Boolean flag
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
geometry (T_GEOMETRY) -- Input geometry moved parallel by p_distance units
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2008 - Original coding in GEOM package.
Simon Greener - January 2013 - Port/Rewrite to T_GEOMETRY object function member.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_PointN -- Returns point (coordinate) at position p_point in underlying geometry.
SYNOPSIS
Member Function ST_PointN(p_point in integer)
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
ARGUMENTS
p_point (integer) -- Point number between 1 and ST_NumPoints().
RESULT
Point (T_GEOMETRY) -- Point at position p_point.
DESCRIPTION
Returns p_point point within underlying geometry.
p_point should be between 1 and ST_NumPoints().
p_point can be -1 which means the last point.
EXAMPLE
With data As (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as TPolygon
From Dual
)
select a.TPolygon.ST_PointN(-1).ST_AsText() as PointN
from data a;
POINTN
---------------
POINT (5.0 5.0)
With data As (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,20 0,20 20,10 20,0 20)',null),0.005,3,1) as tLine
From Dual
)
select t.IntValue as PointId,
a.tLine.ST_PointN(t.IntValue).ST_AsText() as Point
from data a,
table(tools.generate_series(1,a.tLine.ST_NumVertices(),1)) t;
POINTID POINT
------- ------------------
1 POINT (0.0 0.0)
2 POINT (20.0 0.0)
3 POINT (20.0 20.0)
4 POINT (10.0 20.0)
5 POINT (0.0 20.0)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Polygon2Line -- Converts Polygon or MultiPolygon rings to equivalent linestrings.
SYNOPSIS
Member Function ST_Polygon2Line()
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
RESULT
polygon (T_GEOMETRY) -- Returns polygon with rings converted to linestrings.
DESCRIPTION
Converts polygon rings to linestrings via MDSYS.SDO_UTIL.PolygonToLine function.
Behavious is identical to underlying function.
EXAMPLE
With Data as (
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1,11,2003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0, 5,5,5,10,10,10,10,5,5,5)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),
((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_Polygon2Line().ST_AsText() as line
from data a;
LINE
--------------------------------------------------------------------------------------------------------------------------------------------------------------
LINESTRING (0 0, 20 0, 20 20, 0 20, 0 0)
MULTILINESTRING ((0 0, 20 0, 20 20, 0 20, 0 0), (5 5, 5 10, 10 10, 10 5, 5 5))
MULTILINESTRING ((0 0, 20 0, 20 20, 0 20, 0 0), (10 10, 10 11, 11 11, 11 10, 10 10), (5 5, 5 7, 7 7, 7 5, 5 5), (100 100, 200 100, 200 200, 100 200, 100 100))
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Polygon2Rectangle -- Converts optimized rectangles (rings) coded as 5 vertex/point polygons to rectangles.
SYNOPSIS
Member Function ST_Polygon2Rectangle()
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
DESCRIPTION
Converts any optimized rectangle equivalent 4 point polygon rings to their optimized rectangle equivalent.
RESULT
polygon (T_GEOMETRY) -- Returns polygon with rings converted to optimized rectangles where possible.
EXAMPLE
With Data as (
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,1,11,2003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0, 5,5,5,10,10,10,10,5,5,5)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),
((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
From Dual
)
select a.tgeom.ST_Polygon2Rectangle().geom as tPoly
from data a;
TPOLY
------------------------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(0,0,20,20))
SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3,5,2003,3),SDO_ORDINATE_ARRAY(0,0,20,20,5,5,10,10))
SDO_GEOMETRY(2007,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3, 5,2003,3, 9,2003,3, 13,1003,3),SDO_ORDINATE_ARRAY(0,0, 20,20, 10,10, 11,11, 5,5, 7,7, 100,100, 200,200))
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Rectangle -- Creates a rectangle polygon around all point objects within the underlying mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_Rectangle(p_length in number,
p_width in number)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function that creates a rectangle/polygon geometry around each point in the underlying point/multipoint mdsys.sdo_geometry.
As there is no angle parameter, the rectangles are oriented to the XY axes.
If the rectangles need to be rotated, consider using ST_Rotate until such time that this function is modified to support angles.
ARGUMENTS
p_length (Number) - +ve value that describes the longest side of the retangle.
p_width (Number) - +ve value that describes the shortest side of the retangle.
NOTES
Only supports point or multipoint geometries.
If geometry is measured, measure will be lost.
TODO
Add support for rotating the rectangles by adding a p_angle and a p_unit parameter.
RESULT
geometry (T_GEOMETRY) -- (Multi)Polygon geometry where all input vertices are converted to rectangles.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Rectangle2Polygon -- Converts Single Optimized Rectangle Exterior Ring Polygon element to its 5 vertex polygons.
SYNOPSIS
Member Function ST_Rectangle2Polygon()
Return &&INSTALL_SCHEMA..T_Geometry Determinstic
DESCRIPTION
Converts a single exterior ring polygon described by an optimized rectangle to its 5 vertex equivalent polygon equivalent.
EXAMPLE
with data as (
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(0,0,20,20)),0.005,3,1) as tgeom
From Dual union all
Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3,5,2003,3),sdo_ordinate_array(0,0,20,20, 10,10,15,15)),0.005,3,1) as tgeom
From Dual Union All
Select T_GEOMETRY(sdo_geometry(2007,NULL,NULL,sdo_elem_info_array(1,1003,3, 5,2003,3, 9,2003,3, 13,1003,3),sdo_ordinate_array(0,0,20,20, 10,10,11,11, 5,5,7,7, 100,100,200,200)),0.005,1,1) as tgeom
From Dual
)
select a.tGeom.ST_NumElements() as numElements,
a.tGeom.ST_NumRings() as numRings,
a.tgeom.ST_Rectangle2Polygon().ST_AsText() as tPoly
from data a;
NUMELEMENTS NUMRINGS TPOLY
----------- -------- -----------------------------------------------------------------------------------------------------------------------------------------------------------------
1 1 POLYGON ((0 0, 20 0, 20 20, 0 20, 0 0))
1 2 MULTIPOLYGON (((0 0, 20 0, 20 20, 0 20, 0 0), (10 10, 10 15, 15 15, 15 10, 10 10)))
2 4 MULTIPOLYGON (((0 0, 20 0, 20 20, 0 20, 0 0), (10 10, 10 11, 11 11, 11 10, 10 10), (5 5, 5 7, 7 7, 7 5, 5 5)), ((100 100, 200 100, 200 200, 100 200, 100 100)))
RESULT
polygon (T_GEOMETRY) -- Returns 5 vertex polygon.
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Reduce -- Function that can shorten underlying linestring at one or both ends.
SYNOPSIS
Member Function ST_Reduce (p_length in number,
p_start_end in varchar2 default 'START',
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Function that reduces the supplied linestring at either its start or end (p_start_end).
A p_start_end value of BOTH means line is reduced at both ends.
p_length is always assumed to be positive, any negative value is passed through the ABS function.
If p_length is 0 the geometry is returned unchanged.
A reduction can be thought of as the equivalent of extracting a new segment between two measures: p_length ... (SELF.ST_Length() - p_length).
ARGUMENTS
p_length (number) - If negative the linestring is shortened.
If positive the linestring is extended via a call to ST_Extend.
Distance must be expressed in SRID or p_unit units
p_start_end (varchar2) - START means reduce line at the start; END means reduce at the end, and BOTH means reduce at both START and END of line.
p_unit (varchar2) - Allows default Oracle unit of measure (UoM) to be overridden eg if unit M is default for SRID then unit=CM will compute in centimeters.
RESULT
linestring (t_geometry) - Input geometry reduced as instructed.
EXAMPLE
-- Reduce more than length of line.
Select T_Geometry(
mdsys.sdo_geometry('LINESTRING(1 1,2 2)',NULL),
0.05,1,1
)
.ST_Reduce(0.708,'BOTH')
.geom
as geom
From dual;
SQL Error: ORA-20124: Reducing geometry of length (1.4142135623731) by (.708) at both ends would result in a zero length geometry.
ORA-06512: at "T_GEOMETRY", line 3450
-- Changes that remove whole segments.
With data As (
select -- Distance between all segments is 1.414
T_Geometry(
mdsys.sdo_geometry('LINESTRING(1 1,2 2,3 3,4 4)',NULL),0.05,1,1) as tgeom
from dual
)
select 1.414 as seLength,
'START' as Start_end,
a.tgeom.ST_Reduce(1.414,'START').ST_Round(2,1,1).ST_AsText() as tgeom,
a.tgeom.ST_Length(p_round=>a.tGeom.dprecision) as gLength,
a.tgeom.ST_Reduce(1.414,'START').ST_Length(p_round=>a.tGeom.dPrecision) as newLength
from data a union all
select 1.414 as seLength,
'END' as Start_end,
a.tgeom.ST_Reduce(1.414,'END').ST_Round(2,1,1).ST_AsText() as tgeom,
a.tgeom.ST_Length(p_round=>a.tGeom.dPrecision) as gLength,
a.tgeom.ST_Reduce(1.414,'END').ST_Length(p_round=>a.tGeom.dPrecision) as newLength
from data a union all
select 1.414 as seLength,
'BOTH' as Start_end,
a.tgeom.ST_Reduce(1.414,'BOTH').ST_Round(2,1,1).ST_AsText() as tgeom,
a.tgeom.ST_Length(p_round=>a.tGeom.dPrecision) as gLength,
a.tgeom.ST_Reduce(1.414,'BOTH').ST_Length(p_round=>a.tGeom.dPrecision) as newLength
from data a;
SELENGTH START_END TGEOM GLENGTH NEWLENGTH
-------- --------- -------------------------- ------- ---------
1.414 START LINESTRING (2 2, 3 3, 4 4) 4.2 2.8
1.414 END LINESTRING (1 1, 2 2, 3 3) 4.2 2.8
1.414 BOTH LINESTRING (2 2, 3 3) 4.2 1.4
NOTES
Points, GeometryCollections, Polygons, MultiPolygons, CircularStrings are not supported.
Assumes planar projection eg UTM.
ERRORS
The following exceptions can be thrown:
ORA-20120 - Geometry must not be null or empty (*ERR*)
Where *ERR* is replaced with specific error
ORA-20121 - Geometry must be a single linestring.
ORA-20122 - Start/End parameter value (*VALUE*) must be START, BOTH or END
Where *VALUE* is the supplied, incorrect, value.
ORA-20123 - p_extend_dist value must not be 0 or NULL.
ORA-20124 - Reducing geometry of length (*GLEN*) by (*DIST*) at *STARTEND* would result in a zero length geometry.
Where *GLEN* is the length of the existing geometry, *DIST* is ABS(p_length), and *STARTEND* is p_start_end.
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM Package
Simon Greener - July 2011 - Port to T_GEOMETRY
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Reflect -- Function which reflects the underlying geometry to a new location using the provided parameters.
SYNOPSIS
Member Function ST_Reflect (p_reflect_geom in mdsys.sdo_geometry,
p_reflect_plane in number default -1)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which reflects the underlying geometry to a new location, by reflecting around or across p_reflect_geom depending on p_reflect_plane.
ARGUMENTS
p_reflect_geom (sdo_geometry) -- Reflection geometry
p_reflect_plane (number) -- Whether to reflect underlying geometry across p_reflect_geom.
RESULT
geometry -- Input geometry reflected using supplied values.
NOTES
Is wrapper over mdsys.SDO_UTIL.AffineTransforms
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry('POINT(10 10)',null),0.005,2,1) as tgeom,
mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(10,0,0,10)) as reflect_geom
from dual
)
select 'ST_Reflect(p_reflect_geom,-1)' as ReflectTest,
a.tgeom.ST_Reflect(p_reflect_geom=>a.reflect_geom,p_reflect_plane=>-1)
.ST_Round(2,2,1,1)
.ST_AsText() as geom
from testGeom a;
REFLECTTEST GEOM
----------------------------- ---------------
ST_Reflect(p_reflect_geom,-1) POINT (0.0 0.0)
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Relate - Determines spatial relations between two geometry instances.
SYNOPSIS
Member Function ST_Relate (
p_geom sdo_geometry,
p_determine varchar2 default 'DETERMINE'
)
Return varchar2 deterministic
DESCRIPTION
Compares the first geometry against the second using SDO_GEOM.RELATE to discover if the two geometry objects have the required relationship.
The relationhip names (from the Oracle documentation are):
DISJOINT : The boundaries and interiors do not intersect.
TOUCH : The boundaries intersect but the interiors do not intersect.
OVERLAPBDYDISJOINT : The interior of one object intersects the boundary and interior of the other object, but the two boundaries do not intersect.
This relationship occurs, for example, when a line originates outside a polygon and ends inside that polygon.
OVERLAPBDYINTERSECT: The boundaries and interiors of the two objects intersect.
EQUAL : The two objects have the same boundary and interior.
CONTAINS : The interior and boundary of one object is completely contained in the interior of the other object.
COVERS : The interior of one object is completely contained in the interior or the boundary of the other object and their boundaries intersect.
INSIDE : The opposite of CONTAINS. A INSIDE B implies B CONTAINS A.
COVEREDBY : The opposite of COVERS. A COVEREDBY B implies B COVERS A.
ON : The interior and boundary of one object is on the boundary of the other object.
This relationship occurs, for example, when a line is on the boundary of a polygon.
ANYINTERACT : The objects are non-disjoint.
If one does not know what relationships might exist, set the parameter p_determine to the value DETERMINE to discover what relationships exist.
ARGUMENTS
p_geom (sdo_geometry) - Non-null geometry instance.
p_determine (varchar2) - One of the 9 Topological Relationship names (see above):
RESULT
Relationships (varchar) - Result of SDO_GEOM.RELATE()
NOTES
Uses MDSYS.SDO_GEOM.RELATE if Oracle database version is 12c or above,
or if the customer is licensed for the Spatial object before 12c.
ERRORS
With throw exception if the user is not licensed to call MDSYS.SDO_GEOM.RELATE.
-20102 MDSYS.SDO_GEOM.RELATE only supported for Locator users from 12c onwards.';
EXAMPLE
Select t_geometry(sdo_geometry('POLYGON ((100.0 0.0, 400.0 0.0, 400.0 480.0, 160.0 480.0, 160.0 400.0, 240.0 400.0,240.0 300.0, 100.0 300.0, 100.0 0.0))',NULL),0.005,2,1)
.ST_Relate ( sdo_geometry('POLYGON ((-175.0 0.0, 100.0 0.0, 0.0 75.0, 100.0 75.0, 100.0 200.0, 200.0 325.0, 200.0 525.0, -175.0 525.0, -175.0 0.0))',NULL),
'DETERMINE'
) as relations
from dual;
RELATIONS
-------------------
OVERLAPBDYINTERSECT
Select t_geometry( sdo_geometry('LINESTRING (100.0 0.0, 400.0 0.0)',NULL),0.005,2,1)
.ST_Relate(sdo_geometry('LINESTRING (90.0 0.0, 100.0 0.0)',NULL),
'DETERMINE'
) as relations
from dual;
RELATIONS
---------
TOUCH
Select t_geometry( sdo_geometry('POLYGON ((100.0 0.0, 400.0 0.0, 400.0 480.0, 160.0 480.0, 160.0 400.0, 240.0 400.0,240.0 300.0, 100.0 300.0, 100.0 0.0))',NULL),0.0005,2,1)
.ST_Relate(sdo_geometry('POINT (250 150)',NULL),
'DETERMINE'
) as relations
from dual;
RELATIONS
---------
CONTAINS
-- Example using different precision values and a specific "question": Are they equal?
Select t_geometry( sdo_geometry('POINT (250.001 150)' ,NULL),DECODE(t.IntValue,2,0.005,3,0.0005),t.IntValue,1)
.ST_Relate(sdo_geometry('POINT (250 150.002)',NULL),
'EQUAL'
) as relations
from table(tools.GENERATE_SERIES(2,3,1)) t
RELATIONS
---------
EQUAL
FALSE
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Functions ]
NAME
ST_Release -- Returns Version Number for the code in the type.
SYNOPSIS
Static Function ST_Release
Return VarChar2
DESCRIPTION
This function returns a version or release number for the code when distributed.
Also includes versions of the databases the code was developed against .
EXAMPLE
select T_GEOMETRY.ST_Release()
from dual;
T_GEOMETRY.ST_Release()
-----------------------
2.1.1 Databases(11.2, 12.1)
RESULT
Code Release Number (VarChar2) - eg 2.2.1 Databases(11.2, 12.1)
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_RemoveCollinearPoints -- Removes any collinear points in a linestring
SYNOPSIS
Member Function ST_RemoveColliearPoints
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
Removes any collinear points in a linestring
Collinear points are any three points in a line allowing for the middle one to be removed.
SELF.dprecision is vital to determining collinearity.
NOTES
Only supports linestrings, multilinestrings.
Does not support linestrings with circular arcs.
RESULT
geometry (T_GEOMETRY) -- geometry with any collinear points removed.
TODO
Support polygon and multipolygons.
Support linestrings with circular arcs.
EXAMPLE
-- 1. ST_RemoveCollinearPoints
with data as (
select t_geometry(f.geom,0.005,2,1) as tGeom,
f.test
from (select 'Is Collinear 3D' as test, sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,0,10,10,10,20,20,20)) as geom
from dual
union all
select 'Is Collinear 2D' as test, sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,10,10,20,20)) as geom
from dual
union all
select 'Not Collinear 3D' as test, sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,0, 10,11,10, 20,0,21)) as geom
from dual
union all
select 'Not Collinear 2D' as test,
sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,10,10,20,0)) as geom
from dual
) f
)
select a.tGeom.ST_Dims() as dims,
a.test,
a.tGeom.ST_RemoveCollinearPoints().geom as rcpGeom
from data a;
DIMS TEST RCPGEOM
---- ---------------- --------------------------------------------------------------------------------------------------
3 Is Collinear 3D SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,0,20,20,20))
2 Is Collinear 2D SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,20,20))
3 Not Collinear 3D SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,0,10,11,10,20,0,21))
2 Not Collinear 2D SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,10,10,20,0))
-- 2. MultiLineString 3D Geometries.
with data as (
select t_geometry(f.geom,0.005,2,1) as tGeom,
f.test
from (select 'Collinear First and Second LineStrings (same Z)' as test,
sdo_geometry(3006,null,null,sdo_elem_info_array(1,2,1,10,2,1),
sdo_ordinate_array( 0, 0, 0, 10, 10, 0, 20, 20, 0,
100,100,90, 110,110,90, 200,200,90)) as geom
from dual
union all
select 'Multi: Collinear First Linestring (same Z), Not Collinear Second LineString (diff Z)' as test,
sdo_geometry(3006,null,null,sdo_elem_info_array(1,2,1,10,2,1),
sdo_ordinate_array(0,0,0, 10,10,10, 20, 20,20,
100,100,90, 110,120,90, 200,201,95)) as geom
from dual
union all
select 'Multi: Neither part with collinear points' as test,
sdo_geometry(3006,null,null,sdo_elem_info_array(1,2,1,10,2,1),
sdo_ordinate_array(0,0,0, 10,10,10, 20, 0,20,
100,100,90, 110,120,75, 200, 1,50)) as geom
from dual
) f
)
select a.tGeom.ST_Dims() as dims,
a.test,
a.tGeom.ST_RemoveCollinearPoints().geom as rcp
from data a;
DIMS TEST RCP
---- ----------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------
3 Collinear First and Second LineStrings (same Z) SDO_GEOMETRY(3006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,7,2,1),SDO_ORDINATE_ARRAY(0,0,0,20,20,0,100,100,90,200,200,90))
3 Multi: Collinear First Linestring (same Z),
Not Collinear Second LineString (diff Z) SDO_GEOMETRY(3006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,7,2,1),SDO_ORDINATE_ARRAY(0,0,0,20,20,20,100,100,90,110,120,90,200,201,95))
3 Multi: Neither part with collinear points SDO_GEOMETRY(3006,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1,10,2,1),SDO_ORDINATE_ARRAY(0,0,0,10,10,10,20,0,20,100,100,90,110,120,75,200,1,50))
AUTHOR
Simon Greener
HISTORY
Simon Greener - February 2018 - Original TSQL Coding for SQL Spatial.
Simon Greener - August 2018 - Port to Oracle.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_RemoveDuplicateVertices -- Function that removes duplicate points in underlying linear or polygonal geometry.
SYNOPSIS
Member Function ST_RemoveDuplicateVertices
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function that calls MDSYS.SDO_UTIL.REMOVE_DUPLICATE_VERTICES(sdo_geometry,tolerance);
Tolerance used is SELF.TOLERANCE or 0.005 if null.
RESULT
Modified linestring (geometry) - Input linestring/polygon with duplicate points removed.
EXAMPLE
-- Example of exception
select t_geometry(
sdo_geometry('POINT(0 0)',NULL),0.05,2,1
).ST_RemoveDuplicateVertices()
.ST_AsText() as updatedGeom
from dual;
SQL Error: ORA-20121: Geometry must be a linestring or polygon.
ORA-06512: at "T_GEOMETRY", line 2807
-- Linestring example
select t_geometry(
sdo_geometry('LINESTRING(0 0,1 1,1.004 1, 2 2)',NULL),0.005,2,1
).ST_RemoveDuplicateVertices()
.ST_AsText() as updatedGeom
from dual;
UPDATEDGEOM
-------------------
LINESTRING (0 0, 1 1, 2 2)
-- Polygon example
-- Example where tolerance is over-ridden
with data as (
select t_geometry(
sdo_geometry('POLYGON((0 0,1 0,1.004 0,1 2,0 2,0 0))',NULL),0.0005,3,1
) as tGeom
from dual
)
select a.tGeom
.ST_SetTolerance(0.05)
.ST_RemoveDuplicateVertices()
.ST_AsText()
as tolGeom,
a.tGeom
.ST_RemoveDuplicateVertices()
.ST_AsText()
as rGeom
from data a;
TOLGEOM RGEOM
----------------------------------- --------------------------------------------
POLYGON ((0 0, 1 0, 1 2, 0 2, 0 0)) POLYGON ((0 0, 1 0, 1.004 0, 1 2, 0 2, 0 0))
ERRORS
Can throw the following exception:
ORA--20121: Geometry must be a linestring or polygon.
AUTHOR
Simon Greener
HISTORY
Simon Greener - February 2011 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_RemoveInnerRings -- Removes all interior/inner rings from polygon/multipolygon.
SYNOPSIS
Member Function ST_RemoveInnerRings
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
This function allows a user to remove all inner rings from a polygon/multipolygon.
RESULT
geometry (T_GEOMETRY) -- A (multi)polygon with exterior ring(s) only.
EXAMPLE
with data as (
Select T_GEOMETRY(sdo_geometry('MULTIPOLYGON(((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5)),((100 100,200 100,200 200,100 200,100 100)))',null),0.005,3,1) as tgeom
from dual
union all
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as tgeom
from dual
)
select f.iRings as iRingBEfore,
f.geom.ST_NumInteriorRing() as iRingAfter,
f.geom.ST_AsText() as eRingPolygon
from (select a.tgeom.ST_NumInteriorRing() as iRings,
a.tgeom.ST_RemoveInnerRings() as geom
from data a
) f;
IRINGBEFORE IRINGAFTER ERINGPOLYGON
----------- ---------- --------------------------------------------------------------------------------------------------------------------------------
2 0 MULTIPOLYGON (((0.0 0.0, 20.0 0.0, 20.0 20.0, 0.0 20.0, 0.0 0.0)), ((100.0 100.0, 200.0 100.0, 200.0 200.0, 100.0 200.0, 100.0 100.0)))
2 0 POLYGON ((0.0 0.0, 20.0 0.0, 20.0 20.0, 0.0 20.0, 0.0 0.0))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Spetember 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Reverse_Geometry -- Reverses non-point geometries
SYNOPSIS
Member Function ST_Reverse_Linestring
Return T_GEOMETRY Deterministic,
DESCRIPTION
Reverses geometries.
RESULT
geometry (T_GEOMETRY) -- Reverse of SELF geom.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Aug 2017 - Port from GEOM.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Reverse_Linestring -- Reverses linestring including multi-linestring.
SYNOPSIS
Member Function ST_Reverse_Linestring
Return T_GEOMETRY Deterministic,
DESCRIPTION
Reverses linestring including multi-linestring. Honours circular arcs and measures.
RESULT
linestring (T_GEOMETRY) -- Reverse of input Linestring.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Rotate -- Function which rotates the underlying geometry.
SYNOPSIS
Member Function ST_Rotate (
p_angle in number,
p_dir in integer,
p_rotate_point in mdsys.sdo_geometry,
p_line1 in mdsys.sdo_geometry
)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which rotates the underlying geometry around a supplied rotation point p_rotate_point a required angle in radians.
See NOTES for valid parameter values.
Supports 2D and 3D geometry rotation.
ARGUMENTS
p_angle (number) - Rotation angle expressed in degrees (see COGO.ST_Radians and COGO.ST_Degrees).
p_dir (integer) - Rotation parameter for x(0), y(1), or z(2)-axis roll.
You cannot set p_dir => 0, 1 or 2, only -1, -2, -3. They don't see to affect the result.
p_rotate_point (sdo_geometry) - XY/2D Point geometry
p_line1 (sdo_geometry) - Y ordinate of rotation point.
RESULT
geometry -- Input geometry rotated by supplied values.
NOTES
Is wrapper over mdsys.SDO_UTIL.AffineTransforms
For 2D geometry rotation, p_angle and p_rotate_point must not be null.
For 3D geometry rotation, p_angle must not be null
For 3D geometry rotation, both p_dir and p_line1 cannot be null
For 3D geometries, rotation uses either:
1. the angle and dir values, or
2. the angle and line1 values.
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,4,8,4,12,4,12,10,8,10,5,14)),005,2,1) as geom,
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,0, 2,4,22.22, 8,4,374, 12,4,59.26, 12,10,747, 8,10,92.59, 5,14,100)) as geom3D,
mdsys.sdo_geometry(2001,null,sdo_point_type(2,2,null),null,null) as rotatePoint
from dual
)
select 'ST_Rotate(45/Dir/rPoint/Line1)' as rotate,
a.geom.ST_Rotate(p_angle=>45,p_dir=>-1,p_rotate_point=>rotatePoint, p_line1=>null)
.ST_Round(a.geom.dPrecision,a.geom.dPrecision,2,2).geom as geom
from testGeom a
Union All
select 'ST_Rotate3D(45/Dir/rPoint/Line1)' as rotate,
a.geom3d.ST_Rotate(p_angle=>45,p_dir=>-1,p_rotate_point=>rotatePoint, p_line1=>null)
.ST_Round(a.geom.dPrecision,a.geom.dPrecision,2,2).geom as geom
from testGeom a;
AFUNCTION GEOM
-------------------------------- -----------------------------------------------------------------------------------------------------------------------------------------------------
ST_Rotate(45/Dir/rPoint/line1) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,0.59,3.41,4.83,7.66,7.66,10.49,3.41,14.73,0.59,11.9,-4.36,12.61))
ST_Rotate3D(45/Dir/rPoint/line1) SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2.0,2.0,0.0, 0.59,3.41,22.22, 4.83,7.66,374.0, 7.66,10.49,59.26, 3.41,14.73,747.0, 0.59,11.9,92.59, -4.36,12.61,100.0))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Rotate -- Function which rotates the underlying geometry around a provided point or its centre.
SYNOPSIS
Member Function ST_Rotate (
p_angle in number,
p_rotate_point in mdsys.sdo_geometry
)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which rotates the underlying geometry by the provided p_angle angle (degrees see COGO.ST_Radians and COGO.ST_Degrees) around a supplied rotation point p_rotate_point.
If p_rotate_point is null, the centre of the geometry's envelope/MBR is chosen.
Because of limited parameters this version only support 2D geometries.
If underlying geometry is a point and no p_rotate_point is provided, the same point is returned.
ARGUMENTS
p_angle (number) - Rotation angle expressed in radians.
p_rx (number) - X ordinate of rotation point.
p_ry (number) - Y ordinate of rotation point.
RESULT
geometry -- Input geometry rotated by supplied values.
NOTES
Is wrapper over ST_Rotate(p_angle,p_dir,p_rotate_point,p_line1)
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,4,8,4,12,4,12,10,8,10,5,14)),005,2,1) as geom,
mdsys.sdo_geometry(2001,null,sdo_point_type(2,2,null),null,null) as rotatePoint
from dual
)
select 'ST_Rotate(90,NULL)' as rotate,
a.geom.ST_Rotate(p_angle=>90,p_rotate_point=>null)
.ST_Round(a.geom.dprecision,a.geom.dprecision,2,2).geom as geom
From testGeom a
Union All
select 'ST_Rotate(90,POINT)' as rotate,
a.geom.ST_Rotate(p_angle=>90,p_rotate_point=>rotatePoint)
.ST_Round(a.geom.dprecision,a.geom.dprecision,2,2).geom as geom
from testGeom a ;
ROTATE GEOM
------------------- -------------------------------------------------------------------------------------------------------------------
ST_Rotate(90,NULL) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(13,3, 11,3, 11,9, 11,13, 5,13, 5,9, 1,6))
ST_Rotate(90,POINT) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2, 0,2, 0,8, 0,12, -6,12, -6,8, -10,5))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Rotate -- Function which rotates the underlying geometry around a provided point or its centre.
SYNOPSIS
Member Function ST_Rotate (
p_angle in number,
p_rx in number,
p_ry in number
)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which rotates the underlying geometry by the provided p_angle angle around a supplied rotation point p_rx,p_rx.
If p_rx/p_ry is null, the centre of the geometry's envelope/MBR is chosen.
Because of limited parameters this version only support 2D geometries.
If underlying geometry is a point and no p_rx/p_rx values are provided, the same point is returned.
ARGUMENTS
p_angle (number) - Rotation angle expressed in degrees.
p_rx (number) - X ordinate of rotation point.
p_ry (number) - Y ordinate of rotation point.
RESULT
geometry -- Input geometry rotated by supplied values.
NOTES
Is wrapper over ST_Rotate(p_angle,p_dir,p_rotate_point,p_line1)
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,4,8,4,12,4,12,10,8,10,5,14)),005,2,1) as geom,
mdsys.sdo_geometry(2001,null,sdo_point_type(2,2,null),null,null) as rotatePoint
from dual
)
Select 'ST_Rotate(90,null,null)' as rotate,
a.geom.ST_Rotate(p_angle=>90,p_rx=>null,p_ry=>null)
.ST_Round(a.geom.dprecision,a.geom.dprecision,2,2).geom as geom
From testGeom a
Union All
Select 'ST_Rotate(90,2,2)' as rotate,
a.geom.ST_Rotate(p_angle=>90,p_rx=>a.rotatePoint.Sdo_Point.Y,p_ry=>a.rotatePoint.Sdo_Point.Y)
.ST_Round(a.geom.dprecision,a.geom.dprecision,2,2).geom as geom
From testGeom a;
ROTATE GEOM
----------------------- -------------------------------------------------------------------------------------------------------------
ST_Rotate(90,null,null) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(13,3,11,3,11,9,11,13,5,13,5,9,1,6))
ST_Rotate(90,2,2) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,0,2,0,8,0,12,-6,12,-6,8,-10,5))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Rotate -- Function which rotates the underlying geometry around the centre of its MBR.
SYNOPSIS
Member Function ST_Rotate (
p_angle in number
)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which rotates the underlying geometry by the provided p_angle angle (degrees see COGO.ST_Radians and COGO.ST_Degrees) around the centre of the geometry's MBR.
Because of limited parameters this version only support 2D geometries.
If underlying geometry is a point, the same point is returned.
ARGUMENTS
p_angle (number) - Rotation angle expressed in radians.
p_rotate_point (sdo_geometry) - Point around which underlying geometry is rotated p_angle degrees
RESULT
geometry -- Input geometry rotated by supplied values.
NOTES
Is wrapper over ST_Rotate(p_angle,p_dir,p_rotate_point,p_line1)
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,4,8,4,12,4,12,10,8,10,5,14)),005,2,1) as geom
from dual
)
select 'ST_Rotate(90)' as rotate,
a.geom.ST_Rotate(p_angle=>90)
.ST_Round(a.geom.dprecision,a.geom.dprecision,2,2).geom as geom
From testGeom a ;
ROTATE GEOM
----------------- -------------------------------------------------------------------------------------------------------------------
ST_Rotate(90) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(13,3, 11,3, 11,9, 11,13, 5,13, 5,9, 1,6))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_RotTransScale -- Function which reflects the underlying geometry to a new location using the provided parameters.
SYNOPSIS
Member Function ST_RotTransScale (p_angle in number,
p_rs_point in mdsys.sdo_geometry,
p_sx in number,
p_sy in number,
p_sz in number,
p_tx in number,
p_ty in number,
p_tz in number)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which applies a Rotation/Scale and Translate to the underlying geometry as a single operation.
If equivalent of applying individual methods in one:
select a.tgeom.ST_Scale(....).ST_Translate(....).ST_Rotate(....) from ...
But is more efficient as it requires only one call to the mdsys.SDO_UTIL.AffineTransforms function.
ARGUMENTS
p_angle (number) - Rotation angle expressed in radians.
p_rs_point (sdo_geometry) - Single Rotate and Scale point.
p_sx (number) - Scale factor for X ordinates.
p_sy (number) - Scale factor for Y ordinates.
p_sz (number) - Scale factor for Z ordinates.
p_tx (number) - Translation factor for X ordinates.
p_ty (number) - Translation factor for Y ordinates.
p_tz (number) - Translation factor for Z ordinates (if null, the Z ordinate is not changed).
geometry -- Input geometry transformed using supplied values.
NOTES
Is wrapper over mdsys.SDO_UTIL.AffineTransforms
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry('POINT(10 10)',null),0.005,2,1) as tgeom,
mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(10,0,0,10)) as reflect_geom
from dual
)
select 'ST_RotTransScale(p_reflect_geom,-1)' as ReflectTest,
a.tgeom.ST_RotTransScale(p_reflect_geom=>a.reflect_geom,p_reflect_plane=>-1)
.ST_Round(2,2,1,1)
.ST_AsText() as geom
from testGeom a;
REFLECTTEST GEOM
----------------------------- ---------------
ST_RotTransScale(,-1) POINT (0.0 0.0)
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Round -- Rounds X,Y,Z and m (w) ordinates to passed in decimal digits of precision.
SYNOPSIS
Member Function ST_Round(p_dec_places_x in integer default null,
p_dec_places_y in integer default null,
p_dec_places_z in integer default null,
p_dec_places_m in integer default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Applies relevant decimal digits of precision value to ordinates of mdsys.sdo_geometry.
For example:
SELF.x := ROUND(SELF.x,p_dec_places_x);
ARGUMENTS
p_dec_places_x (integer) - value applied to x Ordinate.
p_dec_places_y (integer) - value applied to y Ordinate.
p_dec_places_z (integer) - value applied to z Ordinate.
p_dec_places_m (integer) - value applied to m Ordinate.
RESULT
geometry (T_GEOMETRY)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Scale -- Function which scales the ordinates of the underlying geometry.
SYNOPSIS
Member Function ST_Scale (p_sx in number,
p_sy in number,
p_sz in number default null,
p_scale_point in mdsys.sdo_geometrydefault null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which scales the ordinates of the underlying geometry using the provided scale factors: p_sx, p_sy, p_sz.
If any of p_sx, p_sy, p_sz are null 0.0 is substituted for their value (no effect).
p_scale_point is a point on the input geometry about which to perform the scaling.
If p_scale_point is null a zero point (with 0,0 or 0,0,0 ordinates) is used to scale the geometry about the origin.
If p_scale_point is not null, it should be a nonzero point with ordinates for scaling about a point other than the origin.
ARGUMENTS
p_sx (number) - Scale factor for X ordinates.
p_sy (number) - Scale factor for Y ordinates.
p_sz (number) - Scale factor for Z ordinates.
p_scale_point (sdo_geometry) - Scale point.
RESULT
geometry -- Input geometry scaled using supplied values.
NOTES
Is wrapper over mdsys.SDO_UTIL.AffineTransforms
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,4,8,4,12,4,12,10,8,10,5,14)),0.005,2,1) as tgeom,
mdsys.sdo_geometry(2001,null,sdo_point_type(2,2,null),null,null) as scale_point
from dual
Union All
select T_GEOMETRY(mdsys.sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,1, 2,4,2, 8,4,3, 12,4,4, 12,10,5, 8,10,6, 5,14,7)),0.005,2,1) as tgeom,
mdsys.sdo_geometry(3001,null,sdo_point_type(2,2,2),null,null) as scale_point
from dual
)
select a.tgeom.ST_CoordDimension() as coordDimension,
'ST_Scale(p_sx,p_sy,p_sz,p_scale_point)' as ScaleTest,
a.tgeom.ST_Scale(p_sx=>2,p_sy=>2,p_sz=>case when a.tgeom.ST_CoordDimension()=2 then null else 0.1 end,p_scale_point=>a.scale_point).geom as geom
from testGeom a
COORDDIMENSION SCALETEST GEOM
-------------- ----------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------
2 ST_Scale(p_sx,p_sy,p_sz,p_scale_point) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,6,14,6,22,6,22,18,14,18,8,26))
3 ST_Scale(p_sx,p_sy,p_sz,p_scale_point) SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,1.9,2,6,2,14,6,2.1,22,6,2.2,22,18,2.3,14,18,2.4,8,26,2.5))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SDO_GType -- Returns underlying mdsys.sdo_geometry's SDO_GTYPE attribute.
SYNOPSIS
Member Function ST_SDO_GType
Return Integer Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry SELF.GEOM.SDO_GTYPE attribute.
RESULT
geometry type (Integer) -- eg 2001 for 2D single point etc.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Sdo_Point_Equal -- Compares current object (SELF) geometry's GEOM.SDO_POINT with supplied mdsys.sdo_point_type
SYNOPSIS
Member Function ST_Sdo_Point_Equal(p_sdo_point in mdsys.sdo_point_type,
p_z_precision in integer default 2)
Return varchar2 deterministic
DESCRIPTION
This function compares current t_geometry object' SELF.GEOM.SDO_POINT object to supplied p_sdo_point.
Result can be one of the following:
0 if one or other sdo_point structure is null but not both.
1 if two non-null structures and all ordinates are equal;
-1 if sdo_point's X/Y/Z ordinates not equal
ARGUMENTS
p_sdo_point (SDO_POINT) -- SDO_Point that is to be compared to current object geometry's SELF.GEOM.Sdo_Point element.
p_z_precision (integer) -- Z Ordinate precision for comparison using ROUND
RESULT
-1,0,1 (Integer) -- 0 if one or other sdo_point structures are null but not both.
-- 1 if two non-null structures and all ordinates are equal;
-- -1 if sdo_point's X/Y/Z ordinates not equal
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SdoPoint2Ord -- Changes point encoding from SDO_POINT_TYPE to SDO_ELEM_INFO_ARRAY/SDO_ORDINATE_ARRAY.
SYNOPSIS
Function ST_SdoPoint2Ord
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
Converts underlying Point encoded in SDO_POINT_TYPE structure to one
encoded in sdo_elem_info_array/sdo_ordinate_array elements.
Honours any measure
RESULT
SELF (TO_GEOMETRY) -- Original Point with structure changed.
EXAMPLE
select &&INSTALL_SCHEMA..T_Geometry(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(10.719,8.644,NULL),NULL,NULL),0.005,3,1)
.ST_SdoPoint2Ord()
.geom as geom
from dual;
GEOM
-----------------------------------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(10.719, 8.644))
AUTHOR
Simon Greener
HISTORY
Simon Greener, Jan 2013 - Port to Object method.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Segmentize -- This function processes underlying non-point geometries and returns all segments that fall within the defined parameters eg measures covered by range p_start_value .. p_end_value .
SYNOPSIS
Member Function ST_Segmentize(p_filter in varchar2 default 'ALL',
p_id in integer default null,
p_vertex in T_Vertex default null,
p_filter_value in number default null,
p_start_value in number default null,
p_end_value in number default null,
p_unit in varchar2 default null)
Return T_Segments deterministic,
ARGUMENTS
p_filter (varchar2) -- One of ALL, DISTANCE, ID, MEASURE, RANGE, X or Y
p_id (integer) -- Segment id should be in range 1..SELF.ST_NumSegments. -1 means last.
p_vertex (t_vertex) -- Point object used to return nearest segments/segments.
p_filter_value (float) -- Single measure (or length) along line.
p_start_value (float) -- Measure/Length defining start point of located geometry.
p_end_value (float) -- Measure/Length defining end point of located geometry.
p_unit (varchar2) -- Unit of measure (UoM eg Centimeter) for length/distance calculations.
RESULT
Set of segments (T_SEGMENTs) -- A table array of T_SEGMENT objects.
DESCRIPTION
Given a start and end length, this function breaks the underlying linestring into its fundamental 2 Point LineString or 3 Point CircularStrings.
What is returned depends on the value of p_filter. The following values are supported:
1. ALL -- All other parameters are ignored, and all segments are extracted and returned.
2. DISTANCE -- Segments within shortest distance to p_vertex.
3. ID -- Returns segment at this position in geometry.
4. MEASURE -- All measured segments whose measure range contains p_filter_value value, or if not measured, all segments who length from start contains p_filter_value.
5. RANGE -- All segments whose measure range overlaps p_start_value .. p_end_value.
If the underlying geometry is not measured, p_start_value .. p_end_value are interpreted as lengths from the staring point ie p_start_Length..p_end_length.
6. X -- Find and return all segments whose X ordinate range (eg end.x = start.x) contains the supplied (p_filter_value) X ordinate value.
7. Y -- Find and return all segments whose Y ordinate range (eg end.Y = start.Y) contains the supplied (p_filter_value) Y ordinate value.
If a segment's end point = p_start_value then it is not returned but the next segment, whose StartPoint = p_start_value is returned.
NOTES
Supports linestrings with CircularString elements.
Return is NOT Pipelined
EXAMPLE
-- Compound line string
with data as (
select t_geometry(
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,4,2, 1,2,1, 3,2,2), -- compound line string
SDO_ORDINATE_ARRAY(252000,5526000,
252700,5526700, 252644.346,5526736.414,
252500,5526700, 252280.427,5526697.167, 252230.478,5526918.373
)
),0.05,1,1) as tgeom
from dual
)
SELECT a.tgeom.ST_Sdo_Gtype() as sdo_gtype,
t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'ALL' ) ) t;
SDO_GTYPE SEGMENT
--------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2002 SEGMENT(1,1,1,Start(252000,5526000,NULL,NULL,1,2001,NULL),End(252700,5526700,NULL,NULL,2,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
2002 SEGMENT(1,1,2,Start(252700,5526700,NULL,NULL,2,2001,NULL),Mid(252644.346,5526736.414,NULL,NULL,3,2001,NULL),End(252500,5526700,NULL,NULL,4,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
2002 SEGMENT(1,1,3,Start(252500,5526700,NULL,NULL,4,2001,NULL),Mid(252280.427,5526697.167,NULL,NULL,5,2001,NULL),End(252230.478,5526918.373,NULL,NULL,6,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
-- Extract second circular arc in linestring
WITH data as (
SELECT t_geometry(geom,0.0005,3,1) as tGeom
FROM (SELECT SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,4,2, 1,2,1, 3,2,2), -- compound line string
SDO_ORDINATE_ARRAY(
252000,5526000,
252700,5526700, 252644.346,5526736.414, 252500,5526700,
252280.427,5526697.167, 252230.478,5526918.373
)
) as geom
FROM DUAL
) f
)
SELECT 3 as p_id, t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'ID',
p_id => 3) ) t;
P_ID SEGMENT
---------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
3 SEGMENT(1,1,3,Start(252500,5526700,NULL,NULL,4,2001,NULL),Mid(252280.427,5526697.167,NULL,NULL,5,2001,NULL),End(252230.478,5526918.373,NULL,NULL,6,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
-- All sides of an optimized rectangle with rings
WITH data as (
SELECT t_geometry(geom,0.0005,3,1) as tGeom
FROM (SELECT SDO_GEOMETRY(2003,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,1003,3,5,2003,3),
SDO_ORDINATE_ARRAY(0,0,10,10,200,100,100,200)) AS GEOM
FROM DUAL
) f
)
SELECT t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'ALL') ) t;
SEGMENT
----------------------------------------------------------------------------------------------------------------------
SEGMENT(1,1,1,Start(0,0,NULL,NULL,1,2001,28355),End(10,0,NULL,NULL,2,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,1,2,Start(10,0,NULL,NULL,2,2001,28355),End(10,10,NULL,NULL,3,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,1,3,Start(10,10,NULL,NULL,3,2001,28355),End(0,10,NULL,NULL,4,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,1,4,Start(0,10,NULL,NULL,4,2001,28355),End(0,0,NULL,NULL,5,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,2,1,Start(100,200,NULL,NULL,1,2001,28355),End(200,200,NULL,NULL,2,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,2,2,Start(200,200,NULL,NULL,2,2001,28355),End(200,100,NULL,NULL,3,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,2,3,Start(200,100,NULL,NULL,3,2001,28355),End(100,100,NULL,NULL,4,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,2,4,Start(100,100,NULL,NULL,4,2001,28355),End(100,200,NULL,NULL,5,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
8 rows selected
-- specific side in optimized rectangle
WITH data as (
SELECT t_geometry(geom,0.0005,3,1) as tGeom
FROM (SELECT SDO_GEOMETRY(2003,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,1003,3,5,2003,3),
SDO_ORDINATE_ARRAY(0,0,10,10,200,100,100,200)) AS GEOM
FROM DUAL
) f
)
SELECT 3 as p_id, t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'ID',
p_id => 3) ) t;
P_ID SEGMENT
---------- -----------------------------------------------------------------------------------------------------------------
3 SEGMENT(1,1,3,Start(10,10,NULL,NULL,3,2001,28355),End(0,10,NULL,NULL,4,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
-- All segments of a 2D and 3D stroked linestring
WITH data as (
select t_geometry(geom,0.0005,3,1) as tGeom
FROM (select SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) AS GEOM
from dual UNION ALL
select SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88)) as geom
from dual
) f
)
select a.tgeom.ST_Sdo_Gtype() as sdo_gtype, t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'ALL',
p_vertex => NULL,
p_filter_value=> NULL,
p_start_value => NULL,
p_end_value => NULL,
p_unit => null)) t;
SDO_GTYPE segment
--------- --------------------------------------------------------------------------------------------------------------------------------------------------------
2002 segment(1,1,1,Start(571303.231,321126.963,NULL,NULL,1,2001,28355),End(571551.298,321231.412,NULL,NULL,2,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,2,Start(571551.298,321231.412,NULL,NULL,2,2001,28355),End(572765.519,321322.805,NULL,NULL,3,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,3,Start(572765.519,321322.805,NULL,NULL,3,2001,28355),End(572739.407,321845.051,NULL,NULL,4,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,4,Start(572739.407,321845.051,NULL,NULL,4,2001,28355),End(572752.463,322641.476,NULL,NULL,5,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,5,Start(572752.463,322641.476,NULL,NULL,5,2001,28355),End(573209.428,323398.732,NULL,NULL,6,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,6,Start(573209.428,323398.732,NULL,NULL,6,2001,28355),End(573796.954,323555.406,NULL,NULL,7,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,7,Start(573796.954,323555.406,NULL,NULL,7,2001,28355),End(574436.705,323790.416,NULL,NULL,8,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,8,Start(574436.705,323790.416,NULL,NULL,8,2001,28355),End(574945.895,324051.539,NULL,NULL,9,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,9,Start(574945.895,324051.539,NULL,NULL,9,2001,28355),End(575128.681,324652.122,NULL,NULL,10,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,10,Start(575128.681,324652.122,NULL,NULL,10,2001,28355),End(575128.681,325161.311,NULL,NULL,11,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,11,Start(575128.681,325161.311,NULL,NULL,11,2001,28355),End(575898.993,325213.536,NULL,NULL,12,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,12,Start(575898.993,325213.536,NULL,NULL,12,2001,28355),End(576238.453,324521.56,NULL,NULL,13,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,13,Start(576238.453,324521.56,NULL,NULL,13,2001,28355),End(576251.509,321048.626,NULL,NULL,14,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,14,Start(576251.509,321048.626,NULL,NULL,14,2001,28355),End(575259.242,322615.364,NULL,NULL,15,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 segment(1,1,15,Start(575259.242,322615.364,NULL,NULL,15,2001,28355),End(574306.144,321296.693,NULL,NULL,16,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
3302 segment(1,1,1,Start(571303.231,321126.963,110,NULL,1,3301,28355),End(571551.298,321231.412,377.21,NULL,2,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,2,Start(571551.298,321231.412,377.21,NULL,2,3301,28355),End(572765.519,321322.805,1586.05,NULL,3,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,3,Start(572765.519,321322.805,1586.05,NULL,3,3301,28355),End(572739.407,321845.051,2105.16,NULL,4,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,4,Start(572739.407,321845.051,2105.16,NULL,4,3301,28355),End(572752.463,322641.476,2895.92,NULL,5,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,5,Start(572752.463,322641.476,2895.92,NULL,5,3301,28355),End(573209.428,323398.732,3773.96,NULL,6,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,6,Start(573209.428,323398.732,3773.96,NULL,6,3301,28355),End(573796.954,323555.406,4377.62,NULL,7,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,7,Start(573796.954,323555.406,4377.62,NULL,7,3301,28355),End(574436.705,323790.416,5054.23,NULL,8,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,8,Start(574436.705,323790.416,5054.23,NULL,8,3301,28355),End(574945.895,324051.539,5622.33,NULL,9,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,9,Start(574945.895,324051.539,5622.33,NULL,9,3301,28355),End(575128.681,324652.122,6245.56,NULL,10,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,10,Start(575128.681,324652.122,6245.56,NULL,10,3301,28355),End(575128.681,325161.311,6751.06,NULL,11,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,11,Start(575128.681,325161.311,6751.06,NULL,11,3301,28355),End(575898.993,325213.536,7517.55,NULL,12,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,12,Start(575898.993,325213.536,7517.55,NULL,12,3301,28355),End(576238.453,324521.56,8282.72,NULL,13,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,13,Start(576238.453,324521.56,8282.72,NULL,13,3301,28355),End(576251.509,321048.626,11730.53,NULL,14,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,14,Start(576251.509,321048.626,11730.53,NULL,14,3301,28355),End(575259.242,322615.364,13571.62,NULL,15,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 segment(1,1,15,Start(575259.242,322615.364,13571.62,NULL,15,3301,28355),End(574306.144,321296.693,15186.88,NULL,16,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
30 rows selected
-- Extract 3rd/8th segment of 2D/3D stroked linestring
WITH data as (
SELECT t_geometry(geom,0.0005,3,1) as tGeom
FROM (SELECT SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) AS GEOM
FROM DUAL
UNION ALL
SELECT SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,4,2, 1,2,1, 3,2,2), -- compound line string
SDO_ORDINATE_ARRAY(
252000,5526000,
252700,5526700, 252644.346,5526736.414,
252500,5526700, 252280.427,5526697.167, 252230.478,5526918.373
)
) as geom
FROM DUAL
) f
)
SELECT case when a.tGeom.ST_HasCircularArcs()=1 then 3 else 8 end as id,
a.tgeom.ST_Sdo_Gtype() as sdo_gtype,
t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'ID',
p_id => case when a.tGeom.ST_HasCircularArcs()=1 then 3 else 8 end )) t;
ID SDO_GTYPE SEGMENT
-- --------- -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
8 2002 SEGMENT(1,1,8,Start(574436.705,323790.416,NULL,NULL,1,2001,28355),End(574945.895,324051.539,NULL,NULL,2,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
3 2002 SEGMENT(1,1,3,Start(252700,5526700,NULL,NULL,1,2001,NULL),Mid(252644.346,5526736.414,NULL,NULL,2,2001,NULL),End(252500,5526700,NULL,NULL,3,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
WITH data as (
select t_geometry(
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)),
0.0005,3,1) as tGeom
from dual
)
select a.tgeom.ST_Sdo_Gtype() as sdo_gtype, t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'DISTANCE',
p_vertex => NULL,
p_filter_value=> NULL,
p_start_value => NULL,
p_end_value => NULL,
p_unit => null)) t;
Error report:
SQL Error: ORA-20102: If p_filter DISTANCE, then p_vertex must not be NULL.
ORA-06512: at "&&INSTALL_SCHEMA..T_GEOMETRY", line 1901
ORA-06512: at line 1
-- Find nearest segment to supplied vertex.
WITH data as (
select t_geometry(geom,0.0005,3,1) as tGeom
FROM (select SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) as geom
from dual UNION ALL
select SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88)) as geom
from dual
) f
)
select a.tgeom.ST_Sdo_Gtype() as sdo_gtype, t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'DISTANCE',
p_vertex => T_Vertex(SDO_GEOMETRY(2001,28355,SDO_POINT_TYPE(572804.687,323424.844,NULL),NULL,NULL)) )) t;
SDO_GTYPE segment
--------- -------------------------------------------------------------------------------------------------------------------------------------------------------
2002 segment(1,1,5,Start(572752.463,322641.476,NULL,NULL,5,2001,28355),End(573209.428,323398.732,NULL,NULL,6,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
3302 segment(1,1,5,Start(572752.463,322641.476,2895.92,NULL,5,3301,28355),End(573209.428,323398.732,3773.96,NULL,6,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
-- Find segments containing measure value
WITH data as (
select t_geometry(geom,0.0005,3,1) as tGeom
FROM (select SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) AS GEOM
from dual UNION ALL
select SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88)) as geom
from dual
) f
)
select a.tgeom.ST_Sdo_Gtype() as sdo_gtype,
t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'MEASURE',
p_filter_value=> 2100.0 )) t;
SDO_GTYPE segment
--------- -------------------------------------------------------------------------------------------------------------------------------------------------------
2002 segment(1,1,4,Start(572739.407,321845.051,NULL,NULL,4,2001,28355),End(572752.463,322641.476,NULL,NULL,5,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
3302 segment(1,1,3,Start(572765.519,321322.805,1586.05,NULL,3,3301,28355),End(572739.407,321845.051,2105.16,NULL,4,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
-- Find data within measure range if measured or length range if not
WITH data as (
select t_geometry(geom,0.0005,3,1) as tGeom
FROM (select SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) AS GEOM
from dual UNION ALL
select SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88)) as geom
from dual
) f
)
select a.tgeom.ST_Sdo_Gtype() as sdo_gtype, t.segment.ST_SdoGeometry(a.tGeom.ST_Dims()) as geom
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'RANGE',
p_start_value => 2100.0,
p_end_value => 4300.0
)) t;
SDO_GTYPE GEOM
--------- ----------------------------------------------------------------------------------------------------------------------------------------
2002 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(572739.407,321845.051,572752.463,322641.476))
2002 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(572752.463,322641.476,573209.428,323398.732))
2002 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(573209.428,323398.732,573796.954,323555.406))
2002 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(573796.954,323555.406,574436.705,323790.416))
3302 SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(572765.519,321322.805,1586.05,572739.407,321845.051,2105.16))
3302 SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(572739.407,321845.051,2105.16,572752.463,322641.476,2895.92))
3302 SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(572752.463,322641.476,2895.92,573209.428,323398.732,3773.96))
3302 SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(573209.428,323398.732,3773.96,573796.954,323555.406,4377.62))
8 rows selected
-- Select segments which cross X ordinate value
WITH data as (
SELECT t_geometry(geom,0.0005,3,1) as tGeom
FROM (SELECT SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) AS GEOM
FROM DUAL UNION ALL
SELECT SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88)) as geom
FROM DUAL
) f
)
SELECT a.tgeom.ST_Sdo_Gtype() as sdo_gtype,
t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'X',
p_filter_value=> 571551.0)) t;
SDO_GTYPE SEGMENT
---------- --------------------------------------------------------------------------------------------------------------------------------------------------
2002 SEGMENT(1,1,1,Start(571303.231,321126.963,NULL,NULL,1,2001,28355),End(571551.298,321231.412,NULL,NULL,2,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
3302 SEGMENT(1,1,1,Start(571303.231,321126.963,110,NULL,1,3301,28355),End(571551.298,321231.412,377.21,NULL,2,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
-- Find segments containing X ordinate value
WITH data as (
SELECT t_geometry(geom,0.0005,3,1) as tGeom
FROM (SELECT SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)) AS GEOM
FROM DUAL UNION ALL
SELECT SDO_GEOMETRY(3302,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88)) as geom
FROM DUAL
) f
)
SELECT a.tgeom.ST_Sdo_Gtype() as sdo_gtype,
t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'Y',
p_filter_value=> 321231.412)) t;
SDO_GTYPE SEGMENT
---------- ------------------------------------------------------------------------------------------------------------------------------------------------------------
2002 SEGMENT(1,1,1,Start(571303.231,321126.963,NULL,NULL,1,2001,28355),End(571551.298,321231.412,NULL,NULL,2,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 SEGMENT(1,1,2,Start(571551.298,321231.412,NULL,NULL,2,2001,28355),End(572765.519,321322.805,NULL,NULL,3,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
2002 SEGMENT(1,1,14,Start(576251.509,321048.626,NULL,NULL,14,2001,28355),End(575259.242,322615.364,NULL,NULL,15,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
3302 SEGMENT(1,1,1,Start(571303.231,321126.963,110,NULL,1,3301,28355),End(571551.298,321231.412,377.21,NULL,2,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 SEGMENT(1,1,2,Start(571551.298,321231.412,377.21,NULL,2,3301,28355),End(572765.519,321322.805,1586.05,NULL,3,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
3302 SEGMENT(1,1,14,Start(576251.509,321048.626,11730.53,NULL,14,3301,28355),End(575259.242,322615.364,13571.62,NULL,15,3301,28355),SDO_GTYPE=3302,SDO_SRID=28355)
6 rows selected
-- Circular arc test showing mid point involved in determining if segment is selected for X ordinates.
WITH data as (
SELECT t_geometry(
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)
),0.0005,3,1)
as tGeom
FROM DUAL
)
SELECT t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'X',
p_filter_value => 252309.544 ) ) t;
SEGMENT
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SEGMENT(1,1,1,Start(252230.478,5526918.373,NULL,NULL,1,2001,NULL),Mid(252400.08,5526918.373,NULL,NULL,2,2001,NULL),End(252230.478,5527000,NULL,NULL,3,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
-- Circular arc test showing mid point involved in determining if segment is selected for Y ordinates.
WITH data as (
SELECT t_geometry(
SDO_GEOMETRY(2002,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252700,5526700, 252644.346,5526736.414, 252500,5526700)
),0.0005,3,1)
as tGeom
FROM DUAL
)
SELECT t.segment.ST_AsText() as segment
FROM data a,
table(a.tgeom.ST_Segmentize(p_filter => 'Y',
p_filter_value => 5526724.224 ) ) t;
SEGMENT
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SEGMENT(1,1,1,Start(252700,5526700,NULL,NULL,1,2001,NULL),Mid(252644.346,5526736.414,NULL,NULL,2,2001,NULL),End(252500,5526700,NULL,NULL,3,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
-- Circle
With data As (
SELECT t_geometry(
SDO_GEOMETRY(2003,28355,null,
sdo_elem_info_array(1,1003,4),
SDO_ORDINATE_ARRAY(252315.279,5526865.07512246, 252409.390377544,5526959.1865, 252315.279,5527053.29787754)
),
0.0005,3,1) as circlePoly
FROM Dual
)
select t.segment.ST_AsText() as segment
from data a,
table(a.circlePoly.ST_Segmentize()) t;
SEGMENT
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SEGMENT(1,1,1,
Start(1,252315.279,5526865.07512246,NULL,NULL,2001,28355),
Mid(2,252409.39037754,5526959.1865,NULL,NULL,2001,28355),
End(3,252315.279,5527053.29787754,NULL,NULL,2001,28355),
SDO_GTYPE=2002,SDO_SRID=28355)
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2017 - Original PLSQL Coding for Oracle
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SegmentN -- Returns the segment referenced by p_segment in the underlying linear or polygonal geometry.
SYNOPSIS
Member Function ST_SegmentN(p_segment in integer)
Return &&INSTALL_SCHEMA..T_Segment Deterministic,
DESCRIPTION
Returns the 2-point segment identified by p_segment in a polygon or linestring.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GeometryType() as gType,
(row_number() over (partition by a.tgeom.ST_GeometryType() order by 1)) ||
' of ' ||
a.tGeom.ST_NumSegments() as reference,
a.tGeom.ST_SegmentN(t.IntValue).ST_AsText() as segment
from data a,
table(TOOLS.generate_series(1,a.tgeom.ST_NumSegments(),1)) t;
GTYPE REFERENCE SEGMENT
------------- --------- --------------------------------------------------------------------------------------------------------------
ST_LINESTRING 1 of 5 SEGMENT(1,1,1,Start(0,0,NULL,NULL,1,2001,NULL),End(10,0,NULL,NULL,2,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_LINESTRING 2 of 5 SEGMENT(1,1,2,Start(10,0,NULL,NULL,2,2001,NULL),End(10,5,NULL,NULL,3,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_LINESTRING 3 of 5 SEGMENT(1,1,3,Start(10,5,NULL,NULL,3,2001,NULL),End(10,10,NULL,NULL,4,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_LINESTRING 4 of 5 SEGMENT(1,1,4,Start(10,10,NULL,NULL,4,2001,NULL),End(5,10,NULL,NULL,5,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_LINESTRING 5 of 5 SEGMENT(1,1,5,Start(5,10,NULL,NULL,5,2001,NULL),End(5,5,NULL,NULL,6,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 1 of 8 SEGMENT(1,1,1,Start(0,0,NULL,NULL,1,2001,NULL),End(20,0,NULL,NULL,2,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 2 of 8 SEGMENT(1,1,2,Start(20,0,NULL,NULL,2,2001,NULL),End(20,20,NULL,NULL,3,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 3 of 8 SEGMENT(1,1,3,Start(20,20,NULL,NULL,3,2001,NULL),End(0,20,NULL,NULL,4,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 4 of 8 SEGMENT(1,1,4,Start(0,20,NULL,NULL,4,2001,NULL),End(0,0,NULL,NULL,5,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 5 of 8 SEGMENT(1,2,1,Start(10,10,NULL,NULL,1,2001,NULL),End(10,11,NULL,NULL,2,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 6 of 8 SEGMENT(1,2,2,Start(10,11,NULL,NULL,2,2001,NULL),End(11,11,NULL,NULL,3,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 7 of 8 SEGMENT(1,2,3,Start(11,11,NULL,NULL,3,2001,NULL),End(11,10,NULL,NULL,4,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON 8 of 8 SEGMENT(1,2,4,Start(11,10,NULL,NULL,4,2001,NULL),End(10,10,NULL,NULL,5,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
13 rows selected
RESULT
A 2 point segment (T_SEGMENT) -- Function supplied with p_segment of 3 will return 3rd segment composed of 4th and 5th points.
TODO
Support for CircularString elements.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Sept 2015 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SetPoint -- Sets, or replaces, SDO_POINT_TYPE element of underlying SDO_GEOMETRY.
SYNOPSIS
Member Function ST_SetPoint (p_point in mdsys.sdo_point_type),
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Replaces any, or no, SDO_POINT within underlying SDO_GEOMETRY object.
ARGUMENTS
p_point : mdsys.sdo_point_type : Any valid mdsys.sdo_point_type object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jun 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SetPrecision -- Sets dPrecision property value of object after construction.
SYNOPSIS
Member Function ST_SetPrecision (p_dPrecision in integer default 3),
DESCRIPTION
The dPrecision object property is normally set when the object is constructed.
This member function allows the user to change the value dynamically.
ARGUMENTS
p_dPrecision : integer : Any valid integer value for the Oracle ROUND function.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jun 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SetProjection -- Sets projected property of object after query of MDSYS CS metadata.
SYNOPSIS
Member Procedure ST_SetProjection (SELF in out &&INSTALL_SCHEMA..T_GEOMETRY),
DESCRIPTION
The projected object property is used by the methods of the T_GEOMETRY object
when executing SDO functions that require knowledge of whether the mdsys.sdo_geometry is
coordinate system is projected or geodetic. If the property is not set by a constructor,
on instantiation, this function can be used to set that property at any time.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SetSdoGtype -- Sets SDO_GTYPE for underlying geometry object.
SYNOPSIS
Member Function ST_SetSdoGtype (p_sdo_gtype in integer),
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
If the SDO_GTYPE property is not set by a constructor on instantiation,
this Function can be used to set that property at any time.
ARGUMENTS
p_sdo_gtype (integer) : A valid sdo_gtype number.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jul 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SetSRID -- Sets SDO_SRID for underlying geometry object.
SYNOPSIS
Member Function ST_SetSRID (SELF in out &&INSTALL_SCHEMA..T_GEOMETRY),
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
If the SDO_SRID property is not set by a constructor on instantiation,
this Function can be used to set that property at any time.
ARGUMENTS
p_srid (integer) - Any valid sdo_srid number;
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jul 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SetTolerance -- Sets tolerance value of object after construction.
SYNOPSIS
Member Function ST_SetTolerance (p_tolerance in integer default 0.005),
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
The tolerance object property is normally set when the object is constructed.
This member function allows the user to change the value dynamically.
ARGUMENTS
p_tolerance : number : Any valid Oracle Spatial tolerance. Default is 5cm as per geodetic value.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jun 2017 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SmoothTile -- Smoothly polygon created from raster to segment conversion
SYNOPSIS
Member Function ST_SmoothTile
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
A polygon created from raster to segment conversion, will have many vertices falling
along the same straight line. And whose sides will be "stepped".
This function removes coincident points on a side so that a side will be defined by
only a start and end vertex. The stepped sies will be replaced with vertices in the midpoint of each step
so that any consistent stepped side will be replaced by a single line.
NOTES
Only supports polygons and multipolygons.
RESULT
geometry (T_GEOMETRY) -- Grid shaped polygon replaced by polygons with straight sides.
NOTES
Uses
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original Coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Snap -- The function snaps a point to a linestring(2002) or multi-linestring (2006).
SYNOPSIS
Member Function ST_Snap (p_point in mdsys.sdo_geometry,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRIES Deterministic,
DESCRIPTION
The function snaps a point to a linestring(2002) or multi-linestring (2006).
More than one result point may be returned if p_point was equidistant from two
separate segments/segments of the line-string.
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - A point(2001) mdsys.sdo_geometry object describing the
point for splitting the linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
snapped_points (T_GEOMETRIES) -- One or more points where supplied point has snapped to the linestring.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SnapN -- The function snaps a point to a (multi)linestring (2002/2006) and returns the requested point as a single geometry.
SYNOPSIS
Member Function ST_SnapN(p_point in mdsys.sdo_geometry,
p_id in integer,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
The function snaps a point to a linestring(2002) or multi-linestring (2006).
ST_Snap which is called by this function can return more than one point if p_point was equidistant from two
separate segments/segments of the line-string: this function allows the caller to select a single geometry.
ARGUMENTS
p_point (Sdo_Geometry) -- A point(2001) mdsys.sdo_geometry object describing the
point for splitting the linestring.
p_id (integer) -- Point to return. If p_id is null or > number of geometries the last is returned.
p_unit (VarChar2) -- Unit of measure for distance calculations.
RESULT
Single Snap Point (T_Geometry) -- Nominated snapped point is returned.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Split -- Splits linestring or multi-linestring object at measure point.
SYNOPSIS
Member Function ST_Split (p_measure in number,
p_unit in varchar2 DEFAULT null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Wrapper member function allowing split point to be determined by a measure
SEE ALSO
ST_Split(p_vetex in T_VERTEX...);
ARGUMENTS
p_measure (Number) - Measure defining split point.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
geometry (T_GEOMETRIES) - One or more geometry objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Apr 2014 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Split -- Splits linestring or multi-linestring object at closest point on linestring to supplied point mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_Split (p_point in mdsys.sdo_geometry,
p_unit in varchar2 DEFAULT null)
Return &&INSTALL_SCHEMA..T_GEOMETRIES Deterministic,
DESCRIPTION
Wrapper member function allowing mdsys.sdo_geometry 2001 point rather than T_Vertex.
SEE ALSO
ST_Split(p_vertex in T_VERTEX...);
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - A point used to split the linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
geometry (T_GEOMETRIES) - One or more geometry objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2014 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Split -- Splits linestring or multi-linestring object at closest point on linestring to supplied T_Vertex.
SYNOPSIS
Member Function ST_Split (p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRIES Deterministic,
DESCRIPTION
Using supplied point, this function splits a linestring or multi-linestring object
at its closest point on linestring. Since the closest point may occur more than once,
multiple linestrings may be returned. Normally the point should lie on the linestring at
a vertex or between two vertices but the algorithm used will split a line even if
the point does not lie on the line. Where the point does not lie on the linestring
the algorithm approximates the nearest point on the linestring to the supplied point
and splits it there: the algorithm is ratio based and will not necessarily be accurate
for geodetic data. The function supports linestrings with circular arcs.
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - A point(2001) mdsys.sdo_geometry object describing the point for splitting the linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
geometry (T_GEOMETRIES) - One or more geometry objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Split_Segments -- Splits geometry at nearest point to supplied mdsys.sdo_geometry 2001 point.
SYNOPSIS
Member Function ST_Split_Segments (p_point in mdsys.sdo_geometry,
p_unit in varchar2 DEFAULT null,
p_pairs in integer DEFAULT 0)
Return &&INSTALL_SCHEMA..T_SEGMENTs Deterministic,
DESCRIPTION
Wrapper member function allowing mdsys.sdo_geometry 2001 point rather than T_Vertex.
SEE ALSO
ST_Split_Segments(p_vertex t_vertex...);
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - A point used to split the linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
p_pairs (Integer) - 0 : Return first split point's segments if more than one exists;
1 : Return all split point segments.
RESULT
segments (T_SEGMENTS) - One or more segment objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
DEPRECATED
April 30th. Use ....
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Split_Segments -- Splits geometry at nearest point on the geometry to supplied vertex.
SYNOPSIS
Member Function ST_Split_Segments(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_unit in varchar2 DEFAULT null,
p_pairs in integer DEFAULT 0)
Return &&INSTALL_SCHEMA..T_SEGMENTs Deterministic,
DESCRIPTION
Using supplied vertex, the geometry is split at the nearest point on the geometry.
Normally the vertex should lie on the linestring at a specific vertex or between two
vertices but the algorithm used will split a line even if the supplied vertex does not
lie on the line. Where the point does not lie on the linestring the algorithm approximates
the nearest point on the linestring to the supplied point and splits it there.
Where a linestring splits an existing segment between two vertices, two halfs of the segment
are returned. If the split point is at an exact vertex the segment before and after are returned.
If the linestring is split at the start, the previous segment returned is null, and for the end
point the second segment returns is null. Two segments are always returned.
Since the closest point may occur more than once because the supplied vertex is perfectly between
two line-string segments all possible results are returned. The first pair occurs earlier in the
linestring than the later ones.
If p_pairs is set to 0, only the first split segments are returned.
The algorithm is ratio based and will not necessarily be accurate for geodetic data.
The function supports linestrings with circular arcs.
ARGUMENTS
p_vertex (T_VERTEX) - A vertex point used to split the linestring.
p_unit (VarChar2) - Unit of measure for distance calculations.
p_pairs (Integer) - 0 : Return first split point's segments if more than one exists;
1 : Return all split point segments.
RESULT
segments (T_SEGMENTS) - One or more segment objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
DEPRECATED
April 30th. Use ...
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SquareBuffer -- Creates a square buffer around (multi)linestrings.
SYNOPSIS
Member Function ST_SquareBuffer(p_distance in number,
p_curved in number default 0,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic
DESCRIPTION
This function creates a square buffer around all linestrings in an object.
A negative buffer is not possible.
ARGUMENTS
p_distance (Number) - value > 0.0
p_curved (Number) - 0 = no; 1 = yes for angles in linestring (See ST_Parallel)
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
polygon (T_GEOMETRY) - Result of square buffering linestrings
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SRID -- Returns underlying mdsys.sdo_geometry's SDO_SRID attribute.
SYNOPSIS
Member Function ST_SRID
Return Integer Deterministic,
DESCRIPTION
Is a wrapper over the mdsys.sdo_geometry SELF.GEOM.SDO_SRID attribute.
RESULT
spatial reference id (Integer) -- eg 8311 etc.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_StartPoint -- Returns first Point in underlying geometry.
SYNOPSIS
Member Function ST_StartPoint
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
Returns first point in underlying geometry.
EXAMPLE
With data As (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as TPolygon
From Dual
)
select a.TPolygon.ST_StartPoint().ST_AsText() as Start_Point
from data a;
START_POINT
---------------
POINT (0.0 0.0)
RESULT
Point (T_GEOMETRY) -- First point in underlying geometry.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_StartSegment -- Returns first Segment in underlying geometry.
SYNOPSIS
Member Function ST_StartSegment
Return &&INSTALL_SCHEMA..T_Segment Deterministic,
DESCRIPTION
Returns first segment in underlying geometry.
EXAMPLE
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10))',null),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GeometryType() as geometryType,
a.tGeom.ST_StartSegment().ST_AsText() as start_segment
from data a;
GEOMETRYTYPE START_SEGMENT
------------- ------------------------------------------------------------------------------------------------------------
ST_LINESTRING SEGMENT(1,1,1,Start(0,0,NULL,NULL,1,2001,NULL),End(10,0,NULL,NULL,2,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
ST_POLYGON SEGMENT(1,1,1,Start(0,0,NULL,NULL,1,2001,NULL),End(20,0,NULL,NULL,2,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
RESULT
Segment (T_GEOMETRY) -- First segment in underlying geometry.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_StartVertex -- Returns first vertex in underlying geometry.
SYNOPSIS
Member Function ST_StartVertex
Return T_Vertex Deterministic
RESULT
Vertex (T_Vertex) -- Vertex at start of geometry.
DESCRIPTION
Returns first vertex at start of underlying geometry.
EXAMPLE
With data As (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,20 0,20 20,10 20,0 20)',null),0.005,3,1) as tLine
From Dual
)
select a.tLine.ST_StartVertex().ST_AsText() as start_vertex
from data a;
VERTEX
----------------------------------------------------------
T_Vertex(X=0.0,Y=0.0,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_SwapOrdinates - Allows for swapping ordinate pairs in a geometry.
SYNOPSIS
Member Function ST_SwapOrdinates (p_pair in varchar2 default 'XY' )
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Sometimes the ordinates of a geometry can be swapped such as latitude for X and Longitude for Y when it should be reversed.
This function allows for the swapping of pairs of ordinates controlled by the p_pair parameter.
The following pairs can be swapped in one call:
* XY, XZ, XM, YZ, YM, ZM
ARGUMENTS
p_pair (varchar2) - One of XY, XZ, XM, YZ, YM, ZM
RESULT
Changed geometry (sdo_geometry) - T_Geometry whose internal geom has had its ordinates swapped.
EXAMPLE
select T_GEOMETRY(sdo_geometry(3001,null,sdo_point_type(1,20,30),null,null),0.005).ST_SwapOrdinates('XY').geom as Geom
from dual;
GEOM
---------------------------------------------------------
SDO_GEOMETRY(3001,null,SDO_POINT_TYPE(20,1,30),null,null)
select T_GEOMETRY(sdo_geometry(3001,null,sdo_point_type(1,20,30),null,null),0.005).ST_SwapOrdinates('XZ').geom as Geom
from dual;
GEOM
---------------------------------------------------------
SDO_GEOMETRY(3001,null,SDO_POINT_TYPE(30,20,1),null,null)
select T_GEOMETRY(sdo_geometry(3001,null,sdo_point_type(1,20,30),null,null),0.005).ST_SwapOrdinates('YZ').geom as Geom
from dual;
GEOM
---------------------------------------------------------
SDO_GEOMETRY(3001,null,SDO_POINT_TYPE(1,30,20),null,null)
select T_GEOMETRY(sdo_geometry('LINESTRING (-32 147, -33 180)'),0.005).ST_SwapOrdinates('XY').geom as Geom
from dual;
GEOM
--------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,null,null,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147,-32, 180,-33))
select T_GEOMETRY(sdo_geometry('LINESTRING (0 50, 10 50, 10 55, 10 60, 20 50)'),0.005).ST_SwapOrdinates('XY').geom as Geom
from dual;
GEOM
------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,null,null,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(50,0, 50,10, 55,10, 60,10, 50,20))
select T_GEOMETRY(
sdo_geometry(3002,null,null,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(0,50,105, 10,50,110, 10,55,115, 10,60,120, 20,50,125)
),
0.005)
.ST_SwapOrdinates('XZ').geom as Geom
from dual;
GEOM
--------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,null,null,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(105,50,0, 110,50,10, 115,55,10, 120,60,10, 125,50,20))
select T_GEOMETRY(
sdo_geometry(3002,null,SDO_POINT_TYPE(1,20,30),
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(0,50,105, 10,50,110, 10,55,115, 10,60,120, 20,50,125)
),
0.005)
.ST_SwapOrdinates('YZ').geom as Geom
from dual;
GEOM
---------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,null,SDO_POINT_TYPE(1,30,20),SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,105,50, 10,110,50, 10,115,55, 10,120,60, 20,125,50))
select T_GEOMETRY(
sdo_geometry(3302,null,null,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(5,10,0, 20,5,NULL, 35,10,NULL, 55,10,100)
),
0.005)
.ST_SwapOrdinates('XM').geom as Geom
from dual;
GEOM
--------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,10,5, null,5,20, null,10,35, 100,10,55))
select T_GEOMETRY(
sdo_geometry(4402,null,null,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(5,10,500,0, 20,5,501,NULL, 35,10,502,NULL, 55,10,503,100)
),
0.005)
.ST_SwapOrdinates('ZM').geom as Geom
from dual;
GEOM
------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(4402,null,null,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(5,10,0,500, 20,5,null,501, 35,10,null,502, 55,10,100,503))
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2009 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Tile -- Covers envelope of supplied goemetry with a mesh of tiles of size p_Tile_X and p_Tile_Y.
SYNOPSIS
Member Function ST_Tile (
p_tile_X in number,
p_tile_Y in number,
p_grid_type in varchar2 Default 'TILE',
p_option in varchar2 default 'TOUCH',
p_unit in varchar2 default NULL
)
Returns T_GRIDS PIPELINED
USAGE
With poly As (
select t_geometry(sdo_geometry('POLYGON ((0 0,10 0,10 10,0 10,0 0))',null),0.005,2,1) as poly from dual
)
select row_number() over (order by t.gcol, t.grow) as rid,
t.gCol, t.gRow, t.geom.get_wkt() as geom
FROM poly a,
TABLE(a.poly.ST_Tile(5.0,5.0,'TILE','TOUCH',NULL)) t;
RID GCOL GROW GEOM
--- ---- ---- ---------------------------------------
1 0 0 POLYGON ((0 0, 5 0, 5 5, 0 5, 0 0))
2 0 1 POLYGON ((0 5, 5 5, 5 10, 0 10, 0 5))
3 1 0 POLYGON ((5 0, 10 0, 10 5, 5 5, 5 0))
4 1 1 POLYGON ((5 5, 10 5, 10 10, 5 10, 5 5))
DESCRIPTION
Function that computes spatial extent of internal geometry, then uses the
p_tile_x and p_tile_y extents to compute the number of tiles that cover it.
The number of columns and rows (tiles) that cover this area is calculated using p_Tile_X/p_Tile_Y which are in SRID units.
The tiles are written out with their col/row reference using the T_GRID object type
All rows and columns are visited, with geometry objects being created that represent each tile.
Geometry object created can be:
TILE -- Single polygon per grid cell/Tile (optimized rectangle).
BOTH -- Single polygon per grid cell/Tile (optimized rectangle) with centre point coded in SDO_POINT_TYPE structure.
When polygon tiles are to be returned, they can represent:
MBR -- The entire extent of the underlying geometry;
TOUCH -- Just those touching the input geometry (Intersects);
CLIP -- Where tile has geometric intersection with the underlying geometry it is clipped to the underlying geometry.
HALFCLIP -- Clipped tiles that touch boundary where area is > 1/2 tile
HALFTOUCH -- Tiles that touch boundary where area is > 1/2 tile
ARGUMENTS
p_Tile_X (number) -- Size of a Tile's X dimension in real world units.
p_Tile_Y (number) -- Size of a Tile's Y dimension in real world units.
p_grid_type (varchar2) -- Returned geometry is either 'TILE','POINT' or 'BOTH'
p_option (varchar2) -- MBR -- Tiles for all geometry's MBR
TOUCH -- Only tiles that touch geometry
CLIP -- Return tiles for geometry only but clip using geometry boundary
HALFCLIP -- Return clipped tiles that touch boundary where area is > 1/2 tile
HALFTOUCH -- Return tiles that touch boundary where area is > 1/2 tile
p_unit (varchar2) -- Unit of measure for distance calculations.
RESULT
A Table of the following is returned
(
gcol Integer -- The column reference for a tile
grow Integer -- The row reference for a tile
geom sdo_geometry -- The polygon geometry covering the area of the Tile.
)
NOTES
Following exceptions can the thrown:
-20120 'Geometry must not be null or empty (*ERR*)'
-20121 'Unsupported geometry type (*GTYPE*)'
-20122 'p_grid_type parameter value (*VALUE*) must be TILE, POINT or BOTH'
-20123 'p_option value (*VALUE*) must be MBR, TOUCH, CLIP, HALFCLIP or HALFTOUCH.'
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM package.
Simon Greener - July 2011 - Port to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_To2D -- Converts underlying 3D or 4D mdsys.sdo_geometry to 2D (xy).
SYNOPSIS
Member Function ST_To2D
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
This Function checks if underlying mdsys.sdo_geometry is 2D and returns unchanged.
If mdsys.sdo_geometry has more than xy ordinates (ie xyz or xym or xyzm) the geometry
is stripped of its non-xy ordinates, returning a 2D mdsys.sdo_geometry with only XY ordinates.
RESULT
SELF (TO_GEOMETRY) -- With 2D Underlying mdsys.sdo_geometry.
AUTHOR
Simon Greener
HISTORY
Albert Godfrind, July 2006, Original Coding
Bryan Hall, July 2006, Modified to handle points
Simon Greener, July 2006, Integrated into geom with GF.
Simon Greener, Aug 2009, Removed GF; Modified Byan Hall's version to handle compound elements.
Simon Greener, Jan 2013 - Port to Object method.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_FixZ -- Replaces and measure/elevation NULL values with supplied value eg -9999
SYNOPSIS
Member Function ST_FixZ(p_default_z IN Number := -9999 )
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
It is not uncommon to see linear geometries having a Z or W/M value encoded as NULL while others have numeric values.
This function allows for the replacement of the NULL values with a provided value.
ARGUMENTS
p_default_z (Number) -- New geometry with all Z ordinates to the supplied value.
RESULT
SELF (TO_GEOMETRY) -- Corrected mdsys.sdo_geometry object.
AUTHOR
Simon Greener
HISTORY
Simon Greener, May 2007 Original coding in GEOM package.
Simon Greener, Aug 2009 Added support for interpolating Z values
Simon Greener, Jan 2013 - Port to Object method.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_To3D -- Converts underlying 2D or 4D geometry to a 3D geometry.
SYNOPSIS
Member Function ST_To3D(p_start_z IN Number,
p_end_z IN Number,
p_unit IN varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
If underlying mdsys.sdo_geometry object is a 2D line, it converts it to 3D with supplied start and end z values.
If mdsys.sdo_geometry is 4D it is reduced to 3D with any measures being removed.
Z ordinates are using start and end values ie result is XYZ.
ARGUMENTS
p_start_z (Number) -- Assigned to first coordinates' new Z ordinate.
p_end_z (Number) -- Assigned to last coordinate's new Z ordinate.
p_unit (VarChar2) -- Unit of measure for distance calculations.
RESULT
New Geom (TO_GEOMETRY) -- 3D mdsys.sdo_geometry line encoded with start and end z ordinate vakyes.
AUTHOR
Simon Greener
HISTORY
Simon Greener, May 2007 Original coding in GEOM package.
Simon Greener, Aug 2009 Added support for interpolating Z values
Simon Greener, Jan 2013 - Port to Object method.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_To3D -- Converts underlying 2D or 4D geometry to a 3D geometry.
SYNOPSIS
Member Function ST_To3D (p_zOrdToKeep IN Integer)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
This Function checks if underlying mdsys.sdo_geometry is 2D, converts it to 3D with NULL Z ordinates.
If mdsys.sdo_geometry is 4D it is reduced to 3D with p_zordtokeep indicating which non-2D ordinate
to keep eg if 4 then result is XYW; if 3 then XYZ.
ARGUMENTS
p_zOrdToKeep -- Ignored if 2D, otherwise if moving down from 4D to 3D indicates which ord to keep ie 3 or 4 (cf LRS)
RESULT
New 3D Geom (T_GEOMETRY) -- Underlying mdsys.sdo_geometry reduced or increased to 3D.
AUTHOR
Simon Greener
HISTORY
Simon Greener, May 2007 Original coding in GEOM package.
Simon Greener, Aug 2009 Added support for interpolating Z values
Simon Greener, Jan 2013 - Port to Object method.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_toMultiPoint -- Adds SDO_POINT_TYPE to existing SDO_ORDINATE_ARRAY.
SYNOPSIS
Function ST_toMultiPoint
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic
DESCRIPTION
Converts underlying geometry by adding ordinate data in SDO_POINT_TYPE structure
to point data held in sdo_elem_info_array/sdo_ordinate_array elements.
Honours any measure (if measure is Z ordinate in SDO_POINT_TYPE.
RESULT
SELF (TO_GEOMETRY) -- Original geometry with SDO_POINT added to SDO_ORDINATES
EXAMPLE
select &&INSTALL_SCHEMA..T_Geometry(SDO_GEOMETRY(2005,NULL,SDO_POINT_TYPE(10.719,8.644,NULL),SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(8,10)),0.005,3,1)
.ST_ToMultiPoint()
.geom as geom
from dual;
GEOM
---------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2005,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,2),SDO_ORDINATE_ARRAY(8,10,10.719,8.644))
NOTES
See also ST_SdoPoint2Ord and ST_Ord2SdoPoint.
AUTHOR
Simon Greener
HISTORY
Simon Greener, January 2013 - Port to Object method.
Simon Greener, August 2019 - Documented and fixed operation.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Translate -- Function which translates the underlying geometry to a new location.
SYNOPSIS
Member Function ST_Translate (p_tx in number,
p_ty in number,
p_tz in number default null )
Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,
DESCRIPTION
Function which translates the underlying geometry to a new location, by applying the translation values to its ordinates.
The function MOVES the geometry to a new location.
ARGUMENTS
p_tx (number) - Translation factor for X ordinates.
p_ty (number) - Translation factor for Y ordinates.
p_tz (number) - Translation factor for Z ordinates (if null, the Z ordinate is not changed).
RESULT
geometry -- Input geometry translated (moved) using supplied values.
NOTES
Is wrapper over mdsys.SDO_UTIL.AffineTransforms
EXAMPLE
With testGeom as (
select T_GEOMETRY(mdsys.sdo_geometry(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,2,4,8,4,12,4,12,10,8,10,5,14)),0.005,2,1) as tgeom
from dual
Union All
select T_GEOMETRY(mdsys.sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(2,2,1, 2,4,2, 8,4,3, 12,4,4, 12,10,5, 8,10,6, 5,14,7)),0.005,2,1) as tgeom
from dual
)
select a.tgeom.ST_CoordDimension() as coordDimension,
'ST_Translate(p_tx,p_ty,p_tz)' as TranslateTest,
a.tgeom.ST_Translate(p_tx=>10.0,p_ty=>10.0,p_tz=>case when a.tgeom.ST_CoordDimension()=2 then null else 5.0 end).geom as geom
from testGeom a;
COORDDIMENSION TRANSLATETEST GEOM
-------------- ---------------------------- --------------------------------------------------------------------------------------------------------------------------------------
2 ST_Translate(p_tx,p_ty,p_tz) SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(12,12,12,14,18,14,22,14,22,20,18,20,15,24))
3 ST_Translate(p_tx,p_ty,p_tz) SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(12,12,6,12,14,7,18,14,8,22,14,9,22,20,10,18,20,11,15,24,12))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2015 - New implementation to replace original PLSQL based rotation function.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_TravellingSalesman - Constructs a path through a set of points.
SYNOPSIS
Member Function ST_TravellingSalesman(p_start_gid in integer,
p_start_point in mdsys.sdo_point_type,
p_geo_fence in mdsys.sdo_geometry,
p_unit in varchar2 default 'Meter' )
Return &&INSTALL_SCHEMA..T_Geometry Deterministic,
DESCRIPTION
This function implements a very simple traveling salesman's route through a set of points.
The underlying geometry must be a MultiPoint object.
The starting point may be a point within the existing underlying geometry or a user provided point.
When p_geo_fence is provided it should be a MultiLineString object eg a set of street centrelines aggregated using SDO_AGGR_UNION.
If p_geo_fence is 2D all linestrings in it are of equal weight.
If p_geo_fence has a Z ordinate, its values define an order in the geofences.
The value that must be assigned to the z ordinate of a linestring which forms a hard boundary (such as a physical fence) must be 9.
All other Z values should be given values below 9. So, z=5 could denote a major road, while z=1 is a local street, and z=0 might mean a walking track.
When determining the next point to move to, this z ordering is used in determining where to move.
If the set of nearby objects contained a z=9 object, it would be removed from the set and the next highest chosen.
ARGUMENTS
p_start_gid (integer) - A vertex that exists in the underlying geometry whose Z has this value.
p_start_point (sdo_point_type) - A vertex that may not exist in the underlying geometry, algorithm finds nearest point in underlying geometry to start.
p_geo_fence (sdo_geometry) - A collection of linestrings (multilinestring) containing fences or objects that cannot be crossed unless there is nowhere else to go,
when determining the shortest path.
p_unit (varchar2) - Oracle Unit of Measure eg unit=M.
RESULT
linestring (t_geometry) - New linestring object which is contains the directed set of points defining the salesman's path.
EXAMPLE
With data As (
SELECT SDO_GEOMETRY(2005,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1,50),
SDO_ORDINATE_ARRAY(1597.39,170.16,1374.14,4381.71,7720.98,338.55,
9288.02,4197.86,99.25,3835.6,4486.08,769.94,
1172.92,4010.55,7203.14,227.14,4946.58,3065.22,
3922.71,2841.87,2114.37,1038.88,633.82,2754.83,
4911.44,3446.1,4227.88,3860.79,6007.5,2562.07,
109.36,4410.63,7965.02,4621.98,6552.41,4739.78,
2105.39,956.52,7707.73,4672.84,2853.76,424.77,
6436.58,41.46,882.33,4735.71,1196.23,1433.89,
247.33,1300.91,2305.01,4556.07,5322.28,3006.77,
7840.55,2048.4,5852.83,3900.91,7725.62,4559.27,
707.68,0,6445.65,3296.85,9618.51,2502.49,293.1,
900.11,7373.91,4209.42,1707.32,3876.35,6503.14,
1959.38,0,3205.12,139.89,4699.76,5526.69,4247.66,
1165.67,1553.33,6049.36,2047.12,1562.06,1562.93,
3773.35,732.55,8844.67,2498.88,2714.68,3630.44,446.82,
3063.99,727.39,47.89,4120.27,1188.79,6328.6,2695.57)) as geom
FROM dual
)
select T_Geometry(a.geom,0.005,2,1).ST_TravellingSalesman(3,null).geom as tsGeom
from data a;
TSGEOM
--------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(7720.98,338.55,7203.14,227.14,6436.58,41.46,6503.14,1959.38,6049.36,2047.12,6007.5,2562.07,
6328.6,2695.57,6445.65,3296.85,5852.83,3900.91,5526.69,4247.66,4911.44,3446.1,4946.58,3065.22,
5322.28,3006.77,4227.88,3860.79,3922.71,2841.87,2714.68,3630.44,2305.01,4556.07,1707.32,3876.35,
1172.92,4010.55,1374.14,4381.71,882.33,4735.71,139.89,4699.76,109.36,4410.63,99.25,3835.6,0,
3205.12,446.82,3063.99,633.82,2754.83,1165.67,1553.33,1196.23,1433.89,1562.06,1562.93,2114.37,1038.88,
2105.39,956.52,2853.76,424.77,3773.35,732.55,4120.27,1188.79,4486.08,769.94,1597.39,170.16,727.39,47.89,
707.68,0,293.1,900.11,247.33,1300.91,6552.41,4739.78,7373.91,4209.42,7725.62,4559.27,7707.73,4672.84,
7965.02,4621.98,9288.02,4197.86,9618.51,2502.49,8844.67,2498.88,7840.55,2048.4))
With data As (
SELECT SDO_GEOMETRY(2005,NULL,NULL,
SDO_ELEM_INFO_ARRAY(1,1,50),
SDO_ORDINATE_ARRAY(1597.39,170.16,1374.14,4381.71,7720.98,338.55,
9288.02,4197.86,99.25,3835.6,4486.08,769.94,
1172.92,4010.55,7203.14,227.14,4946.58,3065.22,
3922.71,2841.87,2114.37,1038.88,633.82,2754.83,
4911.44,3446.1,4227.88,3860.79,6007.5,2562.07,
109.36,4410.63,7965.02,4621.98,6552.41,4739.78,
2105.39,956.52,7707.73,4672.84,2853.76,424.77,
6436.58,41.46,882.33,4735.71,1196.23,1433.89,
247.33,1300.91,2305.01,4556.07,5322.28,3006.77,
7840.55,2048.4,5852.83,3900.91,7725.62,4559.27,
707.68,0,6445.65,3296.85,9618.51,2502.49,293.1,
900.11,7373.91,4209.42,1707.32,3876.35,6503.14,
1959.38,0,3205.12,139.89,4699.76,5526.69,4247.66,
1165.67,1553.33,6049.36,2047.12,1562.06,1562.93,
3773.35,732.55,8844.67,2498.88,2714.68,3630.44,446.82,
3063.99,727.39,47.89,4120.27,1188.79,6328.6,2695.57)) as geom
FROM dual
)
select T_Geometry(a.geom,0.005,2,1).ST_TravellingSalesman(null,Sdo_Point_Type(359052.5,5407258.2,NULL)).geom as tsGeom
from data a;
TSGEOM
------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(359052.5,5407258.2,7707.73,4672.84,7725.62,4559.27,7965.02,4621.98,7373.91,
4209.42,6552.41,4739.78,5852.83,3900.91,5526.69,4247.66,4911.44,3446.1,4946.58,
3065.22,5322.28,3006.77,6007.5,2562.07,6328.6,2695.57,6445.65,3296.85,6049.36,2047.12,
6503.14,1959.38,7840.55,2048.4,8844.67,2498.88,9618.51,2502.49,9288.02,4197.86,7720.98,338.55,
7203.14,227.14,6436.58,41.46,4486.08,769.94,4120.27,1188.79,3773.35,732.55,2853.76,424.77,
2105.39,956.52,2114.37,1038.88,1562.06,1562.93,1196.23,1433.89,1165.67,1553.33,247.33,
1300.91,293.1,900.11,727.39,47.89,707.68,0,1597.39,170.16,633.82,2754.83,446.82,3063.99,0,
3205.12,99.25,3835.6,109.36,4410.63,139.89,4699.76,882.33,4735.71,1374.14,4381.71,1172.92,
4010.55,1707.32,3876.35,2305.01,4556.07,2714.68,3630.44,3922.71,2841.87,4227.88,3860.79))
NOTE
This is a naive, simple, and inefficient algorithm.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2016 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_UpdateVertex -- Function that updates (replaces) all geometry points that are equal to the supplied point with the replacement point.
SYNOPSIS
Member Function ST_UpdateVertex (p_old_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_new_vertex in &&INSTALL_SCHEMA..T_Vertex)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Function that updates all coordinates that equal p_old_vertex with the supplied p_old_vertex.
SELF.dprecision is used when comparing geometry point's XY ordinates to p_old_vertex's.
Note that this version of ST_UpdateVertex allows for the update of the first and last vertex in a polygon thereby not invalidating it.
ARGUMENTS
p_old_vertex (T_Vertex) - Original coordinate to be replaced.
p_new_vertex (T_Vertex) - Replacement coordinate
RESULT
geometry (geometry) - Underlying geometry with one or more coordinates replaced.
EXAMPLE
select t_geometry(sdo_geometry('POLYGON((0 0,10 0,10 10,0 10,0 0))',NULL),0.005,2,1)
.ST_UpdateVertex(
T_Vertex(p_x => 0.0,
p_y => 0.0,
p_id => 1,
p_sdo_gtype => 2001,
p_sdo_srid => NULL),
T_Vertex(p_x => 1.0,
p_y => 1.0,
p_id => 1,
p_sdo_gtype => 2001,
p_sdo_srid => NULL)
).ST_AsText() as updatedGeom
from dual;
UPDATEDGEOM
---------------------------------------
POLYGON ((1 1, 10 0, 10 10, 0 10, 1 1))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM package.
Simon Greener - July 2011 - Port to T_GEOMETRY.
COPYRIGHT
(c) 2008-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_UpdateVertex -- Function which updates the coordinate at position v_vertex.id of the underlying geometry with ordinates in v_vertex.x etc.
SYNOPSIS
Member Function ST_UpdateVertex (p_vertex in &&INSTALL_SCHEMA..T_Vertex)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
EXAMPLE
select t_geometry(sdo_geometry('LINESTRING(0 0,2 2)',NULL),0.005,2,1)
.ST_UpdateVertex(
T_Vertex(p_x => 1.0,
p_y => 1.0,
p_id => 2,
p_sdo_gtype => 2001,
p_sdo_srid => NULL)
).ST_AsText() as updatedGeom
from dual;
UPDATEDGEOM
-------------------
LINESTRING(0 0,1 1)
DESCRIPTION
Function that updates coordinate in the underlying geometry identified by p_vertex.id with the ordinate values in p_vertex.
p_verted.id Values:
1. null -> defaults to 1;
2. -1 -> maximum number of points ie STNumPoints(p_geometry)
3. Greater than ST_NumPoints(p_geometry) -> maximum number of points ie ST_NumPoints(p_geometry)
ARGUMENTS
p_vertex (t_vertex) - Replacement coordinate.
RESULT
updated geom (geometry) - Geometry with coordinate replaced.
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM package.
Simon Greener - July 2011 - Port to T_GEOMETRY.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_isValid -- Executes sdo_geom.validate_geometry or validate_geometry_with_context against underlying geometry and returns value.
SYNOPSIS
Member Function ST_Validate
Return varchar2 Deterministic,
DESCRIPTION
If p_context = 0 then this function executes the SDO_GEOM.VALIDATE_GEOMETRY function and returns the result.
If p_context = 1 then this function executes the SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT function and returns the result.
ARGUMENTS
p_context (integer) -- Value of 0 (no context); 1 (context)
RESULT
result (varchar2) -- Returns result of SDO_GEOM.VALIDATE_GEOMETRY/SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT function.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_VertexN -- Returns number of vertices (coordinates) in underlying mdsys.sdo_geometry.
SYNOPSIS
Member Function ST_VertexN (p_vertex in integer)
Return T_Vertex Deterministic
ARGUMENTS
p_vertex (integer) -- Vertex number between 1 and ST_NumVertices().
RESULT
Vertex (T_Vertex) -- Vertex at position p_vertex.
DESCRIPTION
Returns p_vertex vertex within underlying geometry.
p_vertex can be -1 which means the last vertex.
If p_vertex is -1, the actual point id of the last vertex is returned in the T_Vertex structure.
EXAMPLE
With data As (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.005,3,1) as TPolygon
From Dual
)
select a.TPolygon.ST_VertexN(-1).ST_AsText() as VertexN
from data a;
VERTEXN
-----------------------------------------------------------
T_Vertex(X=5.0,Y=5.0,Z=NULL,W=NULL,ID=15,GT=2001,SRID=NULL)
With data As (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,20 0,20 20,10 20,0 20)',null),0.005,3,1) as tLine
From Dual
)
select a.tLine.ST_VertexN(t.IntValue).ST_AsText() as vertex
from data a,
table(tools.generate_series(1,a.tLine.ST_NumVertices(),1)) t;
VERTEX
------------------------------------------------------------
T_Vertex(X=0.0,Y=0.0,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=20.0,Y=0.0,Z=NULL,W=NULL,ID=2,GT=2001,SRID=NULL)
T_Vertex(X=20.0,Y=20.0,Z=NULL,W=NULL,ID=3,GT=2001,SRID=NULL)
T_Vertex(X=10.0,Y=20.0,Z=NULL,W=NULL,ID=4,GT=2001,SRID=NULL)
T_Vertex(X=0.0,Y=20.0,Z=NULL,W=NULL,ID=5,GT=2001,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Vertices -- Extracts all vertices of the underlying geometry, and outputs them as a pipelined set of T_Vertex objects.
SYNOPSIS
Member Function ST_Vertices()
Return &&INSTALL_SCHEMA..T_VERTICES Pipelined
DESCRIPTION
This function allows a user to extract all the vertices of the underlying geometry as a set of T_VERTEX objects.
EXAMPLE
With geometries As (
Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),
0.005,3,1) as tPolygon
From dual
)
Select t.ST_AsText() as vertex
from GEOMETRIES a,
Table(a.tPolygon.ST_Vertices()) t;
VERTEX
-------------------------------------
T_Vertex(X=0.0,Y=0.0,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=20.0,Y=0.0,Z=NULL,W=NULL,ID=2,GT=2001,SRID=NULL)
T_Vertex(X=20.0,Y=20.0,Z=NULL,W=NULL,ID=3,GT=2001,SRID=NULL)
T_Vertex(X=0.0,Y=20.0,Z=NULL,W=NULL,ID=4,GT=2001,SRID=NULL)
T_Vertex(X=0.0,Y=0.0,Z=NULL,W=NULL,ID=5,GT=2001,SRID=NULL)
T_Vertex(X=10.0,Y=10.0,Z=NULL,W=NULL,ID=6,GT=2001,SRID=NULL)
T_Vertex(X=10.0,Y=11.0,Z=NULL,W=NULL,ID=7,GT=2001,SRID=NULL)
T_Vertex(X=11.0,Y=11.0,Z=NULL,W=NULL,ID=8,GT=2001,SRID=NULL)
T_Vertex(X=11.0,Y=10.0,Z=NULL,W=NULL,ID=9,GT=2001,SRID=NULL)
T_Vertex(X=10.0,Y=10.0,Z=NULL,W=NULL,ID=10,GT=2001,SRID=NULL)
T_Vertex(X=5.0,Y=5.0,Z=NULL,W=NULL,ID=11,GT=2001,SRID=NULL)
T_Vertex(X=5.0,Y=7.0,Z=NULL,W=NULL,ID=12,GT=2001,SRID=NULL)
T_Vertex(X=7.0,Y=7.0,Z=NULL,W=NULL,ID=13,GT=2001,SRID=NULL)
T_Vertex(X=7.0,Y=5.0,Z=NULL,W=NULL,ID=14,GT=2001,SRID=NULL)
T_Vertex(X=5.0,Y=5.0,Z=NULL,W=NULL,ID=15,GT=2001,SRID=NULL)
15 rows selected
RESULT
vertices (T_VERTICES) -- Table of T_Vertex objects.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY ] [ Methods ]
NAME
ST_Which_Side -- Returns the side the supplied point lies on.
SYNOPSIS
Member Function ST_Which_Side(p_point in mdsys.sdo_geometry,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,
DESCRIPTION
Given a point this function returns the side the point lies on.
Wrapper over ST_Find_Offset
SEE ALSO
ST_Find_Offset(p_point in mdsys.sdo_geometry...);
ARGUMENTS
p_point (MDSYS.SDO_GEOMETRY) - Point geometry for which a measure is needed.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
side (VarChar2) - L if negative offset; R is positive offset; O if on line.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Types ]
NAME
T_GEOMETRY_ROW - Object Type used when returning sdo_geometry objects in a pipelined function.
DESCRIPTION
An object type that allows for a SDO_GEOMETRY geometry object to be represented as a single object.
Mainly for use in PIPELINED Functions.
If one PIPES a single sdo_geometry object, it appears at the end of the pipeline as the individual 5 attributes of an sdo_geometry object and not a single sdo_geometry attribute object.
NOTES
No methods are declared on this type.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package for &&INSTALL_SCHEMA..
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GEOMETRY_ROW ] [ Variables ]
ATTRIBUTES
gid number, -- geometry id (cf rownum).
geometry mdsys.sdo_geometry, -- geometry object.
tolerance number, -- Tolerance value associated with geometry object (normally T_GEOMETRY.tolerance object)
dPrecision integer, -- Decimal digits of precision value associated with geometry object (normally T_GEOMETRY.dPrecision object)
projected integer, -- Projected value associated with geometry object (normally T_GEOMETRY.projected object)
SOURCE
gid number, geometry mdsys.sdo_geometry, Tolerance number, dPrecision integer, projected integer
[ Top ] [ Types ]
NAME
T_GRID -- Object type representing a single cell in a matrix of non-overlapping (no gaps) cells.
DESCRIPTION
An object type that represents a single cell within an array of
optimized rectanges representing a grid or matrix of "raster" style objects.
Used mainly with T_GRIDS in PIPELINED T_GEOMETRY methods.
NOTES
No methods are declared on this type.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_GRID ] [ Variables ]
ATTRIBUTES
gCol -- Column Reference
gRow -- Row Reference
geom -- SDO_GEOMETRY coded as Optimized Rectangle.
SOURCE
gcol number, grow number, geom mdsys.sdo_geometry
[ Top ] [ Types ]
NAME
T_INTVALUE -- Object type representing a single integer in a series of integers.
DESCRIPTION
An object type that gives a name (IntValue) to a single integer within a series of integers generated by TOOLS.Generate_Series.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_INTVALUE ] [ Variables ]
ATTRIBUTES
IntValue -- Integer value returned by generate_series
SOURCE
IntValue Integer
[ Top ] [ Types ]
NAME
T_MBR - Object Type representing a Minimum Bounding Rectangle (MBR) or a geometry Envelope
DESCRIPTION
An object type that represents an MBR/Envelope of a geometry.
Includes methods to manipulate eg Expand/Contract, convert to SDO_DIM_ARRAY.
NOTES
Only supports Planar / 2D ordinates.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_MBR ] [ Variables ]
ATTRIBUTES
MinX -- X Ordinate of lower left (LL) corner of MBR.
MinY -- Y Ordinate of lower left (LL) corner of MBR.
MaxX -- X Ordinate of upper right (UR) corner of MBR.
MaxY -- Y Ordinate of upper right (UR) corner of MBR.
SOURCE
MinX Number, MinY Number, MaxX Number, MaxY Number,
NAME
A collection of &&INSTALL_SCHEMA..T_MBR Constructors.
SOURCE
Constructor Function T_MBR(SELF IN OUT NOCOPY T_MBR) Return SELF as Result, Constructor Function T_MBR(SELF IN OUT NOCOPY T_MBR, p_mbr in &&INSTALL_SCHEMA..T_MBR) Return SELF as Result, Constructor Function T_MBR( SELF IN OUT NOCOPY T_MBR, p_geometry IN MDSYS.SDO_GEOMETRY, p_tolerance IN NUMBER DEFAULT 0.005) Return SELF as Result, Constructor Function T_MBR( SELF IN OUT NOCOPY T_MBR, p_geometry IN MDSYS.SDO_GEOMETRY, p_dimarray IN MDSYS.SDO_DIM_ARRAY ) Return SELF as Result, Constructor Function T_MBR( SELF IN OUT NOCOPY T_MBR, p_Vertex In &&INSTALL_SCHEMA..T_Vertex, p_dExtent In Number) Return SELF as Result, Constructor Function T_MBR( SELF IN OUT NOCOPY T_MBR, p_dX In NUMBER, p_dY In Number, p_dExtent In Number) Return SELF as Result,
[ Top ] [ T_MBR ] [ Variables ]
SOURCE
-- @property : X -- @version : 1.0 -- @precis : Returns the centre X ordinate of the MBR. -- @return : (maxx - minx) / 2 -- @returntype: Number -- @history : SGG August 2006 - Original Coding Member Function X Return Number Deterministic, -- @property : Y -- @version : 1.0 -- @precis : Returns the centre Y ordinate of the MBR. -- @return : (maxy - miny) / 2 -- @returntype: Number -- @history : SGG August 2006 - Original Coding Member Function Y Return Number Deterministic, -- @property : Width -- @version : 1.0 -- @precis : Returns the width of the MBR. -- Width is defined as the difference between the maximum and minimum x values. -- @return : width (ie maxx - minx) or Empty if MBR has not been set. -- @returntype: Number -- @history : SGG November 2004 - Original Coding Member Function Width Return Number Deterministic, -- @property : Height -- @version : 1.0 -- @precis : Returns the height of the current MBR. -- Height is defined as the difference between the maximum and minimum y values. -- @return : height (ie maxy - miny) or Empty if MBR has not been set. -- @returntype: Number -- @history : SGG November 2004 - Original Coding Member Function Height Return Number Deterministic, Member Function Area Return Number Deterministic, -- @property : Centre -- @version : 1.0 -- @precis : Returns the centre via a T_Vertex. -- @return : xy -- @returntype: T_Vertex -- @history : SGG August 2006 - Original Coding Member Function Centre Return &&INSTALL_SCHEMA..T_Vertex Deterministic, -- @property : Center -- @version : 1.0 -- @precis : Returns the center via a T_Vertex. -- @return : xy -- @returntype: T_Vertex -- @history : SGG August 2006 - Original Coding Member Function Center Return &&INSTALL_SCHEMA..T_Vertex Deterministic, -- @function : AsDimArray -- @version : 1.0 -- @precis : Method that returns MBR as a MdSys.Sdo_Dim_Array -- @return : SELF -- @returntype: MdSys.Sdo_Dim_Array -- @history : SGG September 2005 - Original Coding Member Function AsDimArray Return MDSYS.SDO_DIM_ARRAY Deterministic, -- @function : AsString -- @version : 1.0 -- @precis : Method that returns MBR as a <MBR> XML -- @return : <MBR...> XML -- @returntype: VarChar2 -- @history : SGG April 2002 - Original Coding Member Function AsString Return VarChar2 Deterministic, -- @function : AsCSV -- @version : 1.0 -- @precis : Provides a comma delimited string representation. -- @return : Comma delimited MBR string -- @returntype: VarChar2 -- @history : SJH Feb 2003 - Original Coding Member Function AsCSV Return VarChar2 Deterministic, Member Function AsWKT Return VARCHAR2 Deterministic, -- @function : AsSVG -- @version : 1.0 -- @precis : Returns MBR object as SVG <rect > xml -- @return : SVG <rect> XML -- @returntype: VarChar2 -- @history : SGG April 2002 - Original Coding Member Function AsSVG Return VarChar2 Deterministic, -- @function : getCentreAsSVG -- @version : 1.0 -- @precis : Returns centre coordinate of MBR object as SVG <point> xml -- @return : SVG <point> XML -- @returntype: VarChar2 -- @history : SGG April 2002 - Original Coding Member Function getCentreAsSVG Return VarChar2 Deterministic,
[ Top ] [ T_MBR ] [ Variables ]
SOURCE
Member Procedure SetEmpty(SELF IN OUT NOCOPY T_MBR), -- ---------------------------------------------------------------------------------------- -- @procedure : SetToPart -- @precis : initialiser that sets SELF to MBR of the smallest/largest part in a multi-part shape. -- @version : 1.0 -- @description: Occasionally the MBR of the smallest/largest part of a multi-part shape is -- needed - see sdo_centroid. SELF.function iterates over all the parts of -- a multi-part (SDO_GTYPE == 2007) shape, computes their individual MBRs -- and returns the smallest/largest. -- @usage : FUNCTION SetToPart ( p_geometry IN MDSYS.SDO_GEOMETRY ); -- eg SetToPart(shape,diminfo); -- @param : p_geometry : MDSYS.SDO_GEOMETRY : A shape. -- @param : p_which : integer : Flag indicating smallest (0) part required or largest (1) -- @history : Simon Greener - Feb 2012 - Original coding. -- @copyright : GPL - Free for public use Member Function SetToPart(p_geometry in mdsys.sdo_geometry, p_which in integer /* 0 smallest, 1 largest */ ) Return &&INSTALL_SCHEMA..T_MBR Deterministic, -- ---------------------------------------------------------------------------------------- -- @procedure : SetSmallestPart -- @precis : initialiser that sets SELF to MBR of the smallest part in a multi-part shape. -- @version : 1.0 -- @description: Occasionally the MBR of the smallest part of a multi-part shape is -- needed - see sdo_centroid. SELF.function iterates over all the parts of -- a multi-part (SDO_GTYPE == 2007) shape, computes their individual MBRs -- and returns the smallest. -- @usage : FUNCTION SetSmallestPart ( p_geometry IN MDSYS.SDO_GEOMETRY ); -- eg SetSmallestPart(shape,diminfo); -- @param : p_geometry : A shape. -- @paramtype : p_geomery : MDSYS.SDO_GEOMETRY -- @history : Simon Greener - Feb 2012 - Original coding. -- @copyright : GPL - Free for public use Member Function SetSmallestPart(p_geometry IN MDSYS.SDO_GEOMETRY ) Return &&INSTALL_SCHEMA..T_MBR Deterministic, -- ---------------------------------------------------------------------------------------- -- @procedure : SetLargestPart -- @precis : initialiser that sets SELF to MBR of the largest part in a multi-part shape. -- @version : 1.0 -- @description: Occasionally the MBR of the largest part of a multi-part shape is -- needed - see sdo_centroid. SELF.function iterates over all the parts of -- a multi-part (SDO_GTYPE == 2007) shape, computes their individual MBRs -- and returns the largest. -- @usage : FUNCTION SetLargestPart ( p_geometry IN MDSYS.SDO_GEOMETRY ); -- eg SetLargestPart(shape,diminfo); -- @param : p_geometry : A shape. -- @paramtype : p_geomery : MDSYS.SDO_GEOMETRY -- @history : Simon Greener - Apr 2003 - Original coding. -- @copyright : GPL - Free for public use Member Function SetLargestPart(p_geometry IN MDSYS.SDO_GEOMETRY ) Return &&INSTALL_SCHEMA..T_MBR Deterministic, Member Function Intersection(p_other In &&INSTALL_SCHEMA..T_MBR ) Return &&INSTALL_SCHEMA..T_MBR Deterministic, Member Function Expand(p_Vertex IN &&INSTALL_SCHEMA..T_Vertex) Return &&INSTALL_SCHEMA..T_MBR Deterministic, -- @function : Expand -- @version : 1.0 -- @precis : Enlarges the boundary of the Current MBR so that it contains (x,y). -- Does nothing if (x,y) is already on or within the boundaries. -- @param : dX - the value to lower the minimum x to or to raise the maximum x to -- @paramType : double -- @param : dY - the value to lower the minimum y to or to raise the maximum y to -- @paramType : double -- @history : SGG November 2004 - Original Coding Member Function Expand(p_dX IN NUMBER, p_dY IN NUMBER) Return &&INSTALL_SCHEMA..T_MBR Deterministic, -- @procedure : Expand -- @version : 1.0 -- @precis : Enlarges the boundary of the Current MBR so that it contains another MBR. -- Does nothing if other is wholly on or within the boundaries. -- @param : p_other - MBR to merge with -- @paramType : T_MBR -- @history : SGG November 2004 - Original Coding Member Function Expand(p_other IN &&INSTALL_SCHEMA..T_MBR) Return &&INSTALL_SCHEMA..T_MBR Deterministic, -- @function : Normalize(ratio) -- @version : 1.0 -- @precis : Method that adjusts width/height etc based on passed ratio eg imageWidth/imageHeight. -- If > 0 then the MBR's width is changed to height * ratio. -- If < 0 then the MBR's height is changed to width * ratio. -- @history : SGG August 2006 - Original Coding Member Function Normalize(p_dRatio In Number) Return &&INSTALL_SCHEMA..T_MBR Deterministic,
[ Top ] [ T_MBR ] [ Variables ]
SOURCE
-- @function : Equals -- @version : 1.0 -- @precis : Tests to see if an MBR is equal to another. -- @return : True if p_other is equal to Current else false -- @returntype: Boolean -- @history : SGG November 2004 - Original Coding Member Function Equals( p_other In &&INSTALL_SCHEMA..T_MBR ) Return Boolean Deterministic, -- @function : Evaluate -- @version : 1.0 -- @precis : Returns value that can be used to company two MBRs in an expression of type MBR < OTHER MBR -- @return : Computed number. -- @returntype: Number -- @history : SGG August 2006 - Original Coding Order Member Function Evaluate(p_other In &&INSTALL_SCHEMA..T_MBR) Return Integer
[ Top ] [ T_MBR ] [ Variables ]
SOURCE
Member Function isEmpty
Return Boolean Deterministic,
-- @function : contains
-- @version : 1.0
-- @precis : Returns true if all points on the boundary of p_other
-- lie in the interior or on the boundary of current MBR.
-- @return : True or False
-- @returntype: Boolean
-- @history : SGG November 2004 - Original Coding
Member Function Contains( p_other In &&INSTALL_SCHEMA..T_MBR )
Return Boolean Deterministic,
-- @function : Contains
-- @version : 1.0
-- @precis : Method that tests if a point is within the current MBR
-- @return : True or False
-- @returntype: Boolean
-- @history : SGG November 2004 - Original Coding
Member Function Contains( p_dX In Number,
p_dY In Number )
Return Boolean Deterministic,
Member Function Contains( p_vertex In mdsys.vertex_type )
Return Boolean Deterministic,
Member Function Contains( p_vertex In &&INSTALL_SCHEMA..T_Vertex )
Return Boolean Deterministic,
-- @function : Compare
-- @version : 1.0
-- @precis : compares 2 MBRs and returns percentage area of overlap.
-- @return : 0 (don't overlap) - 100 (equal)
-- @returntype: Number
-- @history : SGG May 2005 - Original Coding
--
Member Function Compare( p_other In spdba.T_MBR )
Return Integer Deterministic,
-- @function : Overlap
-- @version : 1.0
-- @precis : Returns true if any points on the boundary of another MBR
-- coincide with any points on the boundary of SELF.MBR.
-- @return : True or False
-- @returntype: Boolean
-- @history : SGG November 2004 - Original Coding
Member Function Overlap( p_other in &&INSTALL_SCHEMA..T_MBR )
Return Boolean Deterministic,
-- @function : Intersects
-- @version : 1.0
-- @precis : Test the point q to see whether it intersects the Envelope defined by p1-p2
-- @param : p1 one extremal point of the envelope
-- @param : p2 another extremal point of the envelope
-- @param : q the point to test for intersection
-- @return : true if q intersects the envelope p1-p2
Static Function Intersects(p1 in spdba.T_Vertex, p2 in spdba.T_Vertex, q in spdba.T_Vertex)
Return boolean Deterministic,
/**
* Tests whether the envelope defined by p1-p2
* and the envelope defined by q1-q2
* intersect.
*
* @param p1 one extremal point of the envelope P
* @param p2 another extremal point of the envelope P
* @param q1 one extremal point of the envelope Q
* @param q2 another extremal point of the envelope Q
* @return <code>true</code> if Q intersects P
*/
Static Function Intersects (
p1 in spdba.t_vertex, p2 in spdba.T_Vertex,
q1 in spdba.t_vertex, q2 in spdba.t_vertex)
Return boolean Deterministic,
[ Top ] [ Types ]
NAME
T_PrecisionModel -- Object type holding ordinate precision values
DESCRIPTION
JTS has a PrecisionModel class. With the use of NUMBER data type most of the JTS PrecisionModel types (eg FIXED, FLOATING_SINGLE etc)
are not neded. What is needed is a single place one can record XY, Z and M ordinate precision (scale) values.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Types ]
NAME
T_SEGMENT -- Object type representing a single 2-point linestring or single 3 point circular arc.
DESCRIPTION
An object type that represents a single segment of a linestring.
A segment is composed of a minimum of two T_VERTEX objects with Implied director (SEGMENT) from start to end.
When a segment/segment contains a mid coordinate, that segment defines a circular arc.
Includes Methods on that type.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Variables ]
ATTRIBUTES
element_id -- Top level part identifier of multi-part geometry
eg multi-linestring composed of two lines generates element_ids 1 and 2.
subelement_id -- Part id of any sub-elements of a single geometry part
eg inner ring of a single polygon; circular curve of single linestring.
segment_id -- Id of segments in sequential order appears in original geometry
startCoord -- Ordinates of start point
midCoord -- Ordinates of mid point of circular arc
endCoord -- Ordinates of end point
sdo_gtype -- Geometry Type of segment
sdo_srid -- Spatial Reference ID of segment
projected -- If planar then 1 else 0
precisionModel -- Holds precision information for object
SOURCE
element_id integer, subelement_id integer, segment_Id Integer, startCoord &&INSTALL_SCHEMA..T_Vertex, midCoord &&INSTALL_SCHEMA..T_Vertex, /* If circular arc */ endCoord &&INSTALL_SCHEMA..T_Vertex, sdo_gtype integer, sdo_srid integer, projected integer, PrecisionModel &&INSTALL_SCHEMA..T_PrecisionModel, /* Holds XYZM ordinate scale/precision values */
[ Top ] [ T_SEGMENT ] [ Variables ]
ATTRIBUTES
XY -- Single scale/precision value for X and Y ordinates.
Z -- Scale/precision value for the Z ordinate.
W -- Scale/precision value for the W ordinate.
tolerance -- Standard Oracle Spatial tolerance value eg 0.005.
SOURCE
xy integer, z integer, w integer, tolerance number
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
A collection of T_SEGMENT Constructors.
SOURCE
-- Useful as an "Empty" constructor. Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_segment in &&INSTALL_SCHEMA..T_SEGMENT) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_line in mdsys.sdo_geometry, p_segment_id in integer default 0, p_precision in integer default 3, p_tolerance in number default 0.005 ) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_sdo_gtype In Integer, p_sdo_srid In Integer, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005) Return Self As Result, -- T_VERTEX Constructors Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_segment_id In Integer, p_startCoord In &&INSTALL_SCHEMA..T_Vertex, p_endCoord In &&INSTALL_SCHEMA..T_Vertex, p_sdo_gtype In Integer default null, p_sdo_srid In Integer default null, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_segment_id In Integer, p_startCoord In &&INSTALL_SCHEMA..T_Vertex, p_midCoord In &&INSTALL_SCHEMA..T_Vertex, p_endCoord In &&INSTALL_SCHEMA..T_Vertex, p_sdo_gtype In Integer default null, p_sdo_srid In Integer default null, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005 ) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_element_id In Integer, p_subelement_id In Integer, p_segment_id In Integer, p_startCoord In &&INSTALL_SCHEMA..T_Vertex, p_endCoord In &&INSTALL_SCHEMA..T_Vertex, p_sdo_gtype In Integer default null, p_sdo_srid In Integer default null, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_element_id In Integer, p_subelement_id In Integer, p_segment_id In Integer, p_startCoord In &&INSTALL_SCHEMA..T_Vertex, p_midCoord In &&INSTALL_SCHEMA..T_Vertex, p_endCoord In &&INSTALL_SCHEMA..T_Vertex, p_sdo_gtype In Integer default null, p_sdo_srid In Integer default null, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005) Return Self As Result, -- MDSYS.VERTEX_TYPE Constructors Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_segment_id In Integer, p_startCoord In mdsys.vertex_type, p_endCoord In mdsys.vertex_type, p_sdo_gtype In Integer default null, p_sdo_srid In Integer default null, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005 ) Return Self As Result, Constructor Function T_SEGMENT(SELF IN OUT NOCOPY T_SEGMENT, p_segment_id In Integer, p_startCoord In mdsys.vertex_type, p_midCoord In mdsys.vertex_type, p_endCoord In mdsys.vertex_type, p_sdo_gtype In Integer default null, p_sdo_srid In Integer default null, p_projected in integer default 1, p_precision in integer default 3, p_tolerance in number default 0.005) Return Self As Result,
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
OrderBy -- Implements ordering function that can be used to sort a collection of T_Vertex objects.
SYNOPSIS
Order Function OrderBy(p_segment in &&INSTALL_SCHEMA..T_SEGMENT)
Return Number deterministic
ARGUMENTS
p_segment (T_SEGMENT) - Order pair
DESCRIPTION
This order by function allows a collection of T_Vertex objects to be sorted.
For example in the ORDER BY clause of a SELECT statement.
Comparison only uses ordinates: X, Y, Z and W.
If precision is an issue, the two segments have to be rounded before this method can be used.
EXAMPLE
With segments as (
select T_SEGMENT(p_segment_id=> LEVEL,
p_startCoord=>T_Vertex(p_x=>dbms_random.value(0,level),
p_y=>dbms_random.value(0,level),
p_id=>1,
p_sdo_gtype=>2001,
p_sdo_srid=>null),
p_endCoord=>T_Vertex(p_x=>dbms_random.value(0,level),
p_y=>dbms_random.value(0,level),
p_id=>2,
p_sdo_gtype=>2001,
p_sdo_srid=>null),
p_sdo_gtype=>3002,
p_sdo_srid=>null
) as segment
from dual
connect by level < 5
)
select a.segment.st_astext(2) as segment
from segments a
order by a.segment;
SEGMENT
---------------------------------------------------------------------------------------------------------------------------
SEGMENT(NULL,NULL,1,Start(.51,.86,NULL,NULL,1,2001,NULL),End(.2,.43,NULL,NULL,2,2001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
SEGMENT(NULL,NULL,2,Start(1.3,1.31,NULL,NULL,1,2001,NULL),End(.96,1.56,NULL,NULL,2,2001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
SEGMENT(NULL,NULL,3,Start(.84,2.03,NULL,NULL,1,2001,NULL),End(.55,.23,NULL,NULL,2,2001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
SEGMENT(NULL,NULL,4,Start(2.69,1.34,NULL,NULL,1,2001,NULL),End(2.65,1.37,NULL,NULL,2,2001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
4 rows selected
RESULT
order value (NUMBER) - -1 less than; 0 equal; 1 greater than
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_AddCurveBetweenSegments -- Adds Circular Curve between two segments
SYNOPSIS
Member Function ST_AddCurveBetweenSegments(
p_segment In &&INSTALL_SCHEMA..T_Segment,
p_iVertex in &&INSTALL_SCHEMA..T_Verex default NULL,
p_radius In number default null,
p_unit In varchar2 default NULL)
Return mdsys.sdo_Geometry Deterministic,
DESCRIPTION
Adds Circular Curve between two segments.
The segments can be 2 point linestrings or 3 point circular curves.
How the circular cuve is added depends on the parameters.
1. If SELF and p_segment do not meet, and the intersectoin point between
SELF.endCoord and p_segment.startCoord is not provided, the intersection point
is computed using ST_IntersectDetail.
2. If p_radius is provided a circular curve is fitted between end/mid/start of radius p_radius.
3. If p_iVertex, p_radius are not provided, the best circular arc is fittd.
The implementation honours 3D and 4D shapes and averages these dimension values
for the new vertices.
ARGUMENTS
p_segment (T_Segment) -- Other, unconnected, segment
p_iVertex (T_Vertex) -- The intersectoin point between the two segments.
p_radius (number) -- Optional Radius.
p_unit (Varchar2) -- If NULL, the calculations are done using the underlying projection default units.
If an Oracle Unit of Measure is supplied (eg unit=M) that is value for the SRID,
this value is used when calculating the p_offset distance.
RESULT
geometry (sdo_geometry) -- sdo_geometry with self and p_segment joined by circular arc.
EXAMPLE
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 -- Original coding.
Simon Greener - August 2018 -- Ensure all cases correct esp for 3D (XYZ)
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Angle -- Computes the angle that the vector defined by this segment makes with the X-axis.
SYNOPSIS
Member Function ST_Angle
Return number Deterministic,
DESCRIPTION
Computes the angle that the vector defined by this segment makes with the X-axis.
The angle will be in the range [ -PI, PI ] radians.
RESULT
angle (Number) -- The angle this segment makes with the X-axis (in radians)
EXAMPLE
-- Simple angle
select round(
T_Segment(
sdo_geometry('LINESTRING(0 0,10 10)',null)
).ST_Angle(),
3
) as angle
from dual;
ANGLE
----------
.785
SEE ALSO
T_SEGMENT.ST_Bearing
COGO.ST_Degrees
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_AsText -- Returns text Description of underlying segment
SYNOPSIS
Member Function ST_AsText
Return Varchar2 Deterministic,
DESCRIPTION
Returns textual description of segment.
RESULT
String - T_SEGMENT in text format.
EXAMPLE
with data as (
select sdo_geometry(4402,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349,1.3456,0.0005, 10.87365,11.983645,1.98434,14.38573)) as geom
From Dual
Union all
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349,1.3456,10.87365,11.983645,1.98434)) as geom
From Dual
Union all
select sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349, 10.87365,11.983645 )) as geom
from dual
)
select T_Segment(a.geom).ST_AsText() as geomText
from data a;
GEOMTEXT
------------------------------------------------------------------------------------------------------------------------------------------------
SEGMENT(NULL,NULL,0,Start(1,.0023763,.18349,1.346,.001,4401,NULL),End(2,10.87365,11.983645,1.984,14.386,4401,NULL),SDO_GTYPE=4402,SDO_SRID=NULL)
SEGMENT(NULL,NULL,0,Start(1,.0023763,.18349,1.346,NULL,3001,NULL),End(2,10.87365,11.983645,1.984,NULL,3001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
SEGMENT(NULL,NULL,0,Start(1,.0023763,.18349,NULL,NULL,2001,NULL),End(2,10.87365,11.983645,NULL,NULL,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
TODO
Create Function, ST_FromText(), to create T_Segment from ST_AsText representation.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_AsWKT -- Exports T_SEGMENT object to its Extended Well Known Text (EWKT).
SYNOPSIS
Member Function ST_AsWKT
Return varchar2 Deterministic,
DESCRIPTION
Returns Extended Well Known Text representation of underlying T_GEOEMTRY.
Supports 2D/3D/4D t_segments.
Formatting of ordinates supported by supplied p_format_model eg TM9 or FM999999999999990D0
RESULT
WKT (CLOB) -- eg Well Known Text encoding of mdsys.sdo_geometry object.
EXAMPLE
With data as (
select t_segment(sdo_geometry(2002,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.4743434348,5526918.37343433, 252400.034348,5526918.33434333473,252230.4434343378,5527000.433445660))) as segment
from dual union all
select t_segment(SDO_GEOMETRY(3002,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.478,5526918.373,1.5, 252400.08,5526918.373,1.5, 252230.478,5527000.0,1.5))) as segment
from dual union all
select t_segment(SDO_GEOMETRY(3302,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.478,5526918.373,0.0, 252400.08,5526918.373,417.4, 252230.478,5527000.0,506.88))) as segment
from dual union all
select t_segment(SDO_GEOMETRY(4402,28355,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.478,5526918.373,1.5,0.0, 252400.08,5526918.373,1.5,417.4, 252230.478,5527000.0,1.5,506.88))) as segment
from dual union all
select t_segment(sdo_geometry(2002,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(100,100,900,900.0))) as segment
from dual union all
select t_segment(sdo_geometry(3002,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(0,0,1, 10,0,2))) as segment
from dual union all
select t_segment(sdo_geometry(3302,NULL,NULL,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(0,0,1.5, 10,0,1.5, 10,5,1.5 ))) as segment
from dual union all
select t_segment(sdo_geometry(4402,4283,null,
sdo_elem_info_array(1,2,1),
sdo_ordinate_array(147.5,-42.5,849.9,102.0, 147.6,-42.5,1923.0,2100.0))) as segment
From Dual
)
select a.segment.sdo_gtype as gtype,
a.segment
.ST_Round(3)
.ST_AsEWKT('TM9') as ewkt
from data a;
GTYPE EWKT
----- ------------------------------------------------------------------------------------------------------------------------
2002 SRID=28355;CIRCULARSTRING (252230.474 5526918.373,252400.034 5526918.334,252230.443 5527000.433)
3002 SRID=28355;CIRCULARSTRINGZ (252230.478 5526918.373 1.5,252400.08 5526918.373 1.5,252230.478 5527000 1.5)
3302 SRID=28355;CIRCULARSTRINGM (252230.478 5526918.373 0,252400.08 5526918.373 417.4,252230.478 5527000 506.88)
4402 SRID=28355;CIRCULARSTRINGZM (252230.478 5526918.373 1.5 0,252400.08 5526918.373 1.5 417.4,252230.478 5527000 1.5 506.88)
2002 LINESTRING (100 100,900 900)
3002 LINESTRINGZ (0 0 1,10 0 2)
3302 LINESTRINGM (0 0 1.5,10 0 1.5)
4402 SRID=4283;LINESTRINGZM (147.5 -42.5 849.9 102,147.6 -42.5 1923 2100)
8 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Bearing -- Returns Bearing, in degrees, from start to end (possibly normalized to 0..360 degree range.
SYNOPSIS
Member Function ST_Bearing(p_normalize in integer default 1)
Return Number Deterministic
DESCRIPTION
This function computes a bearing from the current object point's startCoord to its EndCoord.
ST_Bearing returns a whole circle bearing in range 0..360 is normalize flag is set.
ARGUMENTS
p_normalize (integer) -- 1 is normalise bearing to 0..360 degree range, 0 leave as calculated
RESULT
bearing (Number) -- Bearing in Degrees.
EXAMPLE
-- Simple bearing for projected data
select round(
T_Segment(
sdo_geometry('LINESTRING(0 0,10 10)',null)
).ST_Bearing(
),3) as bearing
from dual;
BEARING
-------
45
-- Simple geodetic bearing (2D)
select COGO.DD2DMS(
T_Segment(
sdo_geometry(2002,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5,-42.5, 147.6,-42.5))
).ST_Bearing(
)) as bearing
from dual;
BEARING
-----------
90°2'1.606"
SEE ALSO
T_VERTEX.ST_Bearing
COGO.ST_Degrees
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_CheckZ -- Checks Z values on linString or CircularArc
SYNOPSIS
Member Function ST_CheckZ
Return Integer Deterministic,
DESCRIPTION
The circularArc mathematics are considered to be 2D;
If a circularArc coordinate contains a Z ordinate, then its value has to be the same for all coordinates to remain in the same plane;
If the segment is a lineString, its Z values don't need checking;.
RESULT
BOOLEAN (INTEGER) -- 1 if segment's Z ordinates pass checking.
NOTES
See also t_segment constructors that take a valid midCoord t_vertex parameter value.
Where ST_CheckZ fails for a t_segment constructor, the error message is the same as for SQL Server Spatial.
EXAMPLE
-- Check ST_CheckZ for valid planar circularArc segment
select T_Segment(
SDO_GEOMETRY(3002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252230.478,5526918.373,1.0, 252400.08,5526918.373,1.0, 252230.478,5527000.0,1.0))
).ST_CheckZ() as tsegment
from dual;
TSEGMENT
----------
1
-- Test ST_CheckZ built in to circularArc segment constructors
select T_Segment(
SDO_GEOMETRY(3002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252230.478,5526918.373,2.0, 252400.08,5526918.373,2.5, 252230.478,5527000.0,3.0))
) as tsegment
from dual;
Error starting at line 129 in command:
select T_Segment(SDO_GEOMETRY(3002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252230.478,5526918.373,2.0, 252400.08,5526918.373,2.5, 252230.478,5527000.0,3.0)))
as geom from dual
Error report:
SQL Error: ORA-20214: Circular arc segments with Z values must have equal Z value for all 3 points.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Closest -- Finds nearest point on line where supplied geometry comes closest (snap to).
SYNOPSIS
Member Function ST_Closest(p_geometry in mdys.sdo_geometry,
p_unit In varchar2 DEFAULT NULL
)
Return &&INSTALL_SCHEMA..T_Vertex Deterministic
DESCRIPTION
Finds nearest point on segment where supplied geometry comes closest (snap).
Computations respect SRID and unit as uses SDO_GEOM.SDO_CLOSEST_POINTS.
If SDO_GEOM.SDO_CLOSEST_POINTS fails, a result is calculated using planar arithmetic.
This function handles fact that SDO_GEOM function does not support measured segments.
ARGUMENTS
p_geometry (sdo_geometry) - Any sdo_geometry object.
p_unit (Varchar2) - Oracle Unit of Measure eg unit=M.
RESULT
vertex (T_Vertex) -- Nearest point on line supplied vertex is nearest to.
EXAMPLE
-- Planar
-- Planar 3D
With tGeom as (
select sdo_geometry(3001,90000006,Sdo_point_type(562038.848,1013262.454,0.0),NULL,NULL) as geometry,
t_geometry(SDO_GEOMETRY(3002,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
562046.642,1013077.602,0, 562032.193,1013252.074,0.035,
562028.848,1013292.454,0.043, 562018.682,1013424.977,0.07,
562007.163,1013575.247,0.099, 561981.686,1013900.825,0.16,
561971.702,1014043.346,0.187, 561968.808,1014089.436,0.196,
561966.077,1014146.249,0.207, 561957.494,1014376.425,0.25,
561941.333,1014879.5,0.345, 561934.844,1015013.849,0.37,
561930.843,1015108.115,0.388, 561926.975,1015245.592,0.414,
561922.233,1015468.243,0.456, 561918.631,1015586.912,0.478,
561912.301,1015756.343,0.51, 561910.44,1015825.101,0.523,
561909.946,1015874.059,0.532, 561910.027,1015909.594,0.539,
561910.765,1015948.408,0.547, 561913.6,1016019.49,0.561,
561917.047,1016069.767,0.57, 561919.944,1016103.33,0.577,
561927.81,1016171.894,0.59, 561934.889,1016220.292,0.599,
561939.73,1016249.091,0.605, 561949.697,1016302.867,0.615,
561965.347,1016374.268,0.629, 561972.535,1016402.687,0.634
)),
0.0005,3,1)
as lrs_tgeom
from dual
)
select t.segment
.ST_Closest(
p_geometry => a.geometry,
p_unit => 'unit=M'
)
.ST_Round(3)
.ST_AsText() as closestPoint
from tGeom a,
table(a.lrs_tgeom.ST_Segmentize(p_filter=>'DISTANCE',
p_vertex=>SELF.T_Vertex(a.geometry)) t;
CLOSESTPOINT
----------------------------------------------------------
T_Vertex(562031.384,1013261.836,.037,NULL,NULL,3001,90000006)
-- Geodetic
With data as (
select SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(147.439,-43.195,NULL),NULL,NULL) as point,
sdo_geometry(3002,4326,NULL,sdo_elem_info_array(1,2,1),
sdo_ordinate_array(147.50,-43.132,100.0, 147.41,-43.387,30000.0)) as line
from dual
)
select T_Segment(a.line)
.ST_Closest(
p_vertex => T_Vertex(a.point),
p_unit => 'unit=M'
)
.ST_Round(8)
.ST_AsText() as closestPoint
from data a;
CLOSESTPOINT
------------------------------------------------------------
T_Vertex(147.47543293,-43.20182579,NULL,NULL,NULL,2001,4326)
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Functions ]
NAME
ST_ComputeDeflectionAngle - Computes deflection angle between two segments.
SYNOPSIS
Member Function ST_ComputeDeflectionAngle
p_segment t_segment default null,
)
Return Number
DESCRIPTION
This function computes the deflection angle between two segments: SELF.start->(bearing)->SELF.end deflect p_segment.start->(bearing)->p_segment.end
The deflection angle from the projection of the first line to the direction(bearing) of the first line.
If the underlying segment is a circular arc, p_segment is ignored and a deflection angle is computed between the circular arc's three vertices.
If p_segment is supplied its first coordinate is assumed to be the same as the last point of SELF; if not a "virtual" deflection is computed.
If SELF.projected = 0 deflection angle is computed using geodetic math (see MDSYS.SDO_UTIL.BEARING_TILT_FOR_POINTS)
INPUTS
p_segment (t_segment) - A linestring segment
RESULT
angle (number) - Deflection angle in degrees.
AUTHOR
Simon Greener
HISTORY
Simon Greener - April 2019 - Original coding.
COPYRIGHT
(c) 2008-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_ComputeTangentLine -- Computes point that would define a tangential line at the nominated position on the circular arc
SYNOPSIS
Member Function ST_ComputeTangentLine(p_position in VarChar2,
p_fraction In Number default 0.0,
p_unit IN varchar2 default NULL)
Return T_Segment Deterministic,
DESCRIPTION
There is a need to be able to create a tangent line at any point on a circular arc.
This function computes a tangential line at the start/mid or end coord.
INPUTS
p_position (varchar2) -- Requests tangent point for 'START', 'MID', 'END' point, or 'FRACTION' of circular arc.
p_fraction (number) -- Fractional value between 0.0 and 1.0 (length)
p_unit (varchar2) -- If NULL, the calculations are done using the underlying projection default units.
If an Oracle Unit of Measure is supplied (eg unit=M) that is value for the SRID.
RESULT
line (T_Segment) -- A tangent line.
EXAMPLE
with data as (
select T_Segment(
SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',null)
) as circular_string
from dual
)
select a.circular_string.ST_SdoGeometry() as geom
from data a
union all
select b.circular_string
.ST_ComputeTangentLine(
p_position=>case t.IntValue
when 1 then 'START'
when 2 then 'MID'
when 3 then 'END'
end
).ST_SdoGeometry() as geom
from data b,
table(tools.generate_series(1,3,1)) t;
GEOM
----------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373, 252230.478,5527000.0))
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252250.88475,5526875.9725))
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252400.08,5526918.373, 252420.48675,5526960.7735))
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252230.478,5527000.0, 252250.88475,5527042.4005))
-- Fraction.
with data as (
select T_Segment(
SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',28355)
) as circular_string
from dual
)
select CAST(NULL AS Number) as fraction,
a.circular_string.ST_SdoGeometry() as geom
from data a
union all
select CAST(t.IntValue as number) / 10.0 as fraction,
b.circular_string
.ST_ComputeTangentLine(
p_position =>'FRACTION',
p_fraction => CAST(t.IntValue as number) / 10.0,
p_unit => 'unit=M' )
.ST_Round(3)
.ST_SdoGeometry() as tangentLine
from data b,
table(tools.generate_series(0,10,1)) t;
FRACTION GEOM
---------- --------------------------------------------------------------------------------------------------------------------------------------------
NULL SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252230.478,5526918.373,252400.08,5526918.373,252230.478,5527000))
0 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252230.478,5526918.373,252250.885,5526875.973))
0.1 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252221.549,5526967.649,252217.318,5526920.784))
0.2 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252239.159,5527014.529,252211.488,5526976.469))
0.3 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252278.323,5527045.738,252235.047,5527027.261))
0.4 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252327.951,5527052.441,252281.324,5527058.777))
0.5 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252373.991,5527032.738,252337.215,5527062.094))
0.6 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252403.406,5526992.209,252419.918,5526948.146))
0.7 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252407.868,5526942.33,252399.44,5526896.035))
0.8 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252386.114,5526897.224,252355.132,5526861.806))
0.9 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252344.302,5526869.662,252299.54,5526855.151))
1 SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(252294.273,5526867.449,252248.404,5526877.953))
12 rows selected
NOTES
If SELF.projected is 1 then calculations are PLANAR or PROJECTED, otherwise GEODETIC/GEOGRAPHIC.
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2011 - Original Coding
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_ComputeTangentPoint -- Computes point that would define a tandential line at the start, mid or end point of a circular arc
SYNOPSIS
Member Function ST_ComputeTangentPoint(p_position In VarChar2,
p_fraction In Number default 0.0,
p_unit IN varchar2 default NULL)
Return T_Vertex Deterministic,
DESCRIPTION
There is a need to be able to compute an angle between a linestring and a circularstring.
To do this, one needs to compute a tangential line at the start, mid, end or user fraction of a circularstring.
This function computes point that would define a tangential line at the start, mid or end of a circular arc.
INPUTS
p_position (varchar2) -- Requests tangent point for 'START', 'MID', 'END' point, or 'FRACTION' of circular arc.
p_fraction (number) -- Fractional value between 0.0 and 1.0 (length)
p_unit (varchar2) -- If NULL, the calculations are done using the underlying projection default units.
If an Oracle Unit of Measure is supplied (eg unit=M) that is value for the SRID.
RESULT
point (T_Vertex) -- A tangent point that combined with the start, mid or end of the circularstring creates a tangential line.
EXAMPLE
select T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_midCoord => T_Vertex(
p_id => 2,
p_x => 15,
p_y => 5,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_ComputeTangentPoint(p_position =>'START')
.ST_AsText() as tangentPoint
from dual;
TANGENTPOINT
------------------------------------
T_Vertex(10,5,NULL,NULL,1,2001,NULL)
-- Circular String all points tangent
with data as (
select T_Segment(
SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',null)
) as circular_string
from dual
)
select a.circular_string.ST_SdoGeometry() as geom
from data a
union all
select b.circular_string
.ST_ComputeTangentPoint(
p_position=>cast(case t.IntValue
when 1 then 'START'
when 2 then 'MID'
when 3 then 'END'
end as varchar(5))
).ST_SdoGeometry() as geom
from data b,
table(tools.generate_series(1,3,1)) t;
GEOM
-------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252230.478,5526918.373,252400.08,5526918.373,252230.478,5527000))
SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(252189.6645,5527003.174,NULL),NULL,NULL)
SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(252440.8935,5527003.174,NULL),NULL,NULL)
SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(252189.6645,5526915.199,NULL),NULL,NULL)
-- Fraction
select CAST(t.IntValue as number) / 10.0 as fraction,
T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_midCoord => T_Vertex(
p_id => 2,
p_x => 15,
p_y => 5,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_ComputeTangentPoint(p_position =>'FRACTION',
p_fraction => CAST(t.IntValue as number) / 10.0)
.ST_Round(3)
.ST_SdoGeometry() as tangentPoint
from table(tools.generate_series(0,10,1)) t;
FRACTION TANGENTPOINT
---------- -------------------------------------------------------------------
0 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(10,-2.5,NULL),NULL,NULL)
0.1 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(9.472,-0.833,NULL),NULL,NULL)
0.2 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(9.485,0.916,NULL),NULL,NULL)
0.3 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(10.039,2.576,NULL),NULL,NULL)
0.4 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(11.077,3.983,NULL),NULL,NULL)
0.5 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(12.5,5,NULL),NULL,NULL)
0.6 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(18.923,3.983,NULL),NULL,NULL)
0.7 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(19.961,2.576,NULL),NULL,NULL)
0.8 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(20.515,0.916,NULL),NULL,NULL)
0.9 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(20.528,-0.833,NULL),NULL,NULL)
1 SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(20,-2.5,NULL),NULL,NULL)
11 rows selected
NOTES
If SELF.projected is 1 then calculations are PLANAR or PROJECTED, otherwise GEODETIC/GEOGRAPHIC.
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2011 - Original Coding
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Densify -- Implements a basic geometry densification algorithm.
SYNOPSIS
Member Function ST_Densify(p_distance in number)
p_unit IN varchar2 default NULL)
Return mdsys.sdo_Geometry Deterministic
DESCRIPTION
This function add vertices to an existing vertex-to-vertex described geometry segment.
New vertices are added in such a way as to ensure that no two vertices will
ever fall with SELF.PrecisionModel.XY.
Also, because of the nature of the implementation there is no guarantee that the
added vertices will be p_distance apart.
The implementation prefers to balance the added vertices across a complete segment
such that an even number are added. The final vertex separation will be
BETWEEN p_distance AND p_distance * 2 .
The implementation honours 3D and 4D shapes and averages these dimension values
for the new vertices.
ARGUMENTS
p_distance (Number) -- The desired optimal distance between added vertices. Must be > SELF.tolerance.
RESULT
geometry (sdo_geometry) -- Densified geometry.
EXAMPLE
NOTES
Does not support CircularArc segments.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 -- Original coding.
Simon Greener - August 2018 -- Ensure all cases correct esp for 3D (XYZ)
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Dims -- Returns number of ordinate dimensions
SYNOPSIS
Member Function ST_Dims
Return INTEGER Deterministic,
DESCRIPTION
Examines SDO_GTYPE (2XXX etc) and extracts coordinate dimensions.
If SDO_GTYPE is null, examines ordinates eg XY not null, Z null -> 2.
RESULT
BOOLEAN (INTEGER) -- 2 if data 2D; 3 if 3D; 4 if 4D
EXAMPLE
with data as (
select T_Segment(
SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',28355)
) as circular_segment
from dual
)
select a.circular_segment.ST_Dims() as Dims
from data a;
DIMS
----
2
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Distance -- Returns Distance from segment to the supplied segment (T_Segment)
SYNOPSIS
Member Function ST_Distance(p_segment in &&INSTALL_SCHEMA..T_Segment,
p_unit in varchar2 DEFAULT NULL)
Return Number Deterministic
DESCRIPTION
(Wrapper over sdo_geometry ST_Distance method).
This function computes a distance from the input T_Segment object to the underlying T_SEGMENT.
Result is in the distance units of the SDO_SRID, or in p_units where supplied.
ARGUMENTS
p_segment (T_SEGMENT) - A single T_Segment from which a distance to the segment is calculated.
p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.
RESULT
distance (Number) -- Distance in SRID unit of measure or in supplied units (p_unit)
EXAMPLE
-- Examples of ST_Distance to T_Vertex single poins
with data as (
select 'Planar LineString to Point' as test,
sdo_geometry('LINESTRING(0 0,10 10)',null) as geom,
sdo_geometry('POINT(5 0)',null) as dGeom
from dual
union all
select 'Geo LineString to Point' as test,
sdo_geometry('LINESTRING(147.50 -43.132,147.41 -43.387)',4326) as geom,
sdo_geometry('POINT(147.3 -43.2)',4326) as dGeom
from dual
union all
select 'Planar CircularString to Point' as test,
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)) as geom,
SDO_GEOMETRY('POINT(252429.706 5527034.024)',28355) as dGeom
from dual
)
select a.test,
T_Segment(a.geom).ST_Distance(p_vertex=>T_Vertex(a.dGeom),p_unit=>NULL) as d_in_meters,
T_Segment(a.geom).ST_Distance(p_vertex=>T_Vertex(a.dGeom),p_unit=>'unit=KM') as l_in_km
from data a;
TEST D_IN_METERS L_IN_KM
------------------------------ ----------- ----------
Planar LineString to Point 3.535534 3.535534
Geo LineString to Point 13820.16185 13.820162
Planar CircularString to Point 42.61532 0.042615
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Distance -- Returns Distance from segment supplied T_Vertex (Wrapper)
SYNOPSIS
Member Function ST_Distance(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_unit in varchar2 DEFAULT NULL)
Return Number Deterministic
DESCRIPTION
(Wrapper over sdo_geometry ST_Distance method).
This function computes a distance from the input T_Vertex object to the underlying T_SEGMENT.
Result is in the distance units of the SDO_SRID, or in p_units where supplied.
ARGUMENTS
p_geom (T_VERTEX) - A single vertex from which a bearing to the segment is calculated.
p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.
RESULT
distance (Number) -- Distance in SRID unit of measure or in supplied units (p_unit)
EXAMPLE
-- Examples of ST_Distance to T_Vertex single poins
with data as (
select 'Planar LineString to Point' as test,
sdo_geometry('LINESTRING(0 0,10 10)',null) as geom,
sdo_geometry('POINT(5 0)',null) as dGeom
from dual
union all
select 'Geo LineString to Point' as test,
sdo_geometry('LINESTRING(147.50 -43.132,147.41 -43.387)',4326) as geom,
sdo_geometry('POINT(147.3 -43.2)',4326) as dGeom
from dual
union all
select 'Planar CircularString to Point' as test,
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)) as geom,
SDO_GEOMETRY('POINT(252429.706 5527034.024)',28355) as dGeom
from dual
)
select a.test,
T_Segment(a.geom).ST_Distance(p_vertex=>T_Vertex(a.dGeom),p_unit=>NULL) as d_in_meters,
T_Segment(a.geom).ST_Distance(p_vertex=>T_Vertex(a.dGeom),p_unit=>'unit=KM') as l_in_km
from data a;
TEST D_IN_METERS L_IN_KM
------------------------------ ----------- ----------
Planar LineString to Point 3.535534 3.535534
Geo LineString to Point 13820.16185 13.820162
Planar CircularString to Point 42.61532 0.042615
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Equals -- Compares current object (SELF) with supplied segment.
SYNOPSIS
Member Function ST_Equals(p_segment in &&INSTALL_SCHEMA..T_SEGMENT,
p_coords In Integer default 1)
Return Integer deterministic
DESCRIPTION
This function compares current segment object (SELF) to supplied segment (p_vertex).
If all ordinates (to supplied precision) are equal, returns True (1) else False (0).
SDO_GTYPE, SDO_SRID and ID are not compared uinless p_coords = 0
NOTES
To compare all 4 ordinates, use ST_Round on both segments before calling ST_Equals
ARGUMENTS
p_segment (T_Segment) -- Segment that is to be compared to current object (SELF).
p_coords (Integer) -- Boolean. If 1, only coordinates are compared; if 0, then all elements including segment_id etc are compared.
RESULT
BOOLEAN (INTEGER) - 1 is True (Equal); 0 is False.
EXAMPLE
set serveroutput on size unlimited
Declare
v_segment1 T_Segment;
v_segment2 T_Segment;
Begin
v_segment1 :=
T_Segment(
p_segment_id => 0,
p_startCoord => t_Vertex(
p_id=>1,
p_x=>0.0023763,
p_y=>0.18349,
p_z=>1.346,
p_w=>0.001,
p_sdo_gtype=>4401,
p_sdo_srid=>NULL
),
p_EndCoord => T_Vertex(
p_id=>2,
p_x=>10.87365,
p_y=>11.983645,
p_z=>1.984,
p_w=>14.386,
p_sdo_gtype=>4401,
p_sdo_srid=>NULL
),
p_sdo_gtype=>4402,
p_sdo_srid =>NULL
);
v_segment2 := T_Segment(v_segment1);
v_segment2.segment_id := 2;
dbms_output.put_line('Equals(With Metadata): ' ||
v_segment1.ST_Equals(p_segment =>v_segment2,
p_coords => 0 ));
dbms_output.put_line('Equals(Only Coords): ' ||
v_segment1.ST_Equals(p_segment =>v_segment2,
p_coords => 1 ));
END;
anonymous block completed
Equals(With Metadata): 0
Equals(Only Coords): 1
TODO
Consider extending to support precision for xy, z and W.
Need to do so in all other objects (T_Geometry currently only supports SELF.precision not SELF.precision XY/Z/W).
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_FindCircle -- Finds a centre X and Y and Radius from three points of underlying circular arc.
SYNOPSIS
Member Function ST_FindCircle (
DESCRIPTION
If the underlying object is a circular arc segment, then this function computes the centre and radius defining it.
If segment is not a circular arc, null is returned.
NOTES
Assumes planar projection eg UTM.
Works only on 2D circular segments
RESULT
Circle Properties (T_Vertex) : X ordinate of centre of circle.
Y ordinate of centre of circle.
Z ordinate contains radius of circle.
SRID as underlying T_SEGMENT.
EXAMPLE
-- Compute measure of point
with data as (
select 'LineString' as test,
sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,2),sdo_ordinate_array(0,0,5,5,10,0)) as geom
from dual
union all
select 'CircularString' as test,
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)) as geom
from dual
)
select a.test,
T_Segment(a.geom)
.ST_FindCircle()
.ST_AsText() as circle_params
from data a;
TEST CIRCLE_PARAMS
-------------- ----------------------------------------------------------
LineString T_Vertex(5,0,5,NULL,0,2001,NULL)
CircularString T_Vertex(252315.279,5526959.1865,94.111,NULL,0,2001,28355)
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_getProjected -- Rerturns whether underlying segment is planar/projected (1) or geographic/geodetic (0).
SYNOPSIS
Static Function ST_GetProjection
Return integer deterministic,
DESCRIPTION
This function can be used to discover whether the underlying SRID is projeccted/planar or not.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_hasM -- Tests segment to see if coordinates include a measure.
SYNOPSIS
Member Function ST_hasM
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc) to see if sdo_gtype has measure ordinate eg 3302 not 3002.
If SDO_GTYPE is null, examines coordinates to see if W ordinate is not null.
RESULT
BOOLEAN (INTEGER) -- 1 means segment has measure ordinate, 0 otherwise.
EXAMPLE
select T_Segment(sdo_geometry(3302,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5, -42.5,0.0, 147.6, -42.5, 10923.0))).ST_hasM() as hasM
from dual;
HASM
----
1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_hasZ -- Tests segment to see if coordinates include a Z ordinate.
SYNOPSIS
Member Function ST_hasZ
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc). If D position is 2 then segment does not have a Z ordinate.
If D position is 3 and measure ordinate position (L) is 0 then segment has Z ordinate.
If D position is 3 and measure ordinate position (L) is not equal to 0 then segment does not have a Z ordinate.
If D position is 4 and measure ordinate position (L) is equal to 0 or equal to D (4) then segment has a Z ordinate.
If D position is 4 and measure ordinate position (L) is equal to 3 then segment does not have a Z ordinate.
If SDO_GTYPE is null, examines Z and W ordinates of the segment's coordinates to determine if segment has Z ordinate.
RESULT
BOOLEAN (INTEGER) -- 1 means segment has Z ordinate, 0 otherwise.
EXAMPLE
select T_Segment(sdo_geometry(3002,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5, -42.5,10.0, 147.6, -42.5, 10.0))).ST_hasZ() as hasZ
from dual;
HASZ
----
1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Intersect -- Computes intersection point between two 2D or 3D segments, returning a single intersection vertex.
SYNOPSIS
Member Function ST_Intersect(p_segment IN T_SEGMENT,
p_unit IN varchar2 default NULL)
Return T_Vertex Deterministic,
DESCRIPTION
This function computes the intersection point between the underlying 2D/3D segment and the provided 2D/3D segment.
The intersection point computed is always physical ie a physical intersection or an empty vertex is returned if no intersection is computed.
If segments are parallel an empty T_VERTEX is returned with T_VERTEX.id set to -9.
Intersection between a linestring segment and circular arc segment is supported.
However, the intersection between two circular arc segments is not yet supported.
INPUTS
p_segment (T_Segment) -- Second segment for which an intersection with current is computed.
p_unit (varchar2) -- Oracle Unit of Measure eg unit=M.
RESULT
Intersection (T_Vertex) -- The intersection point or empty point with id = -9 for parallel segments.
EXAMPLE
select T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_Intersect(p_segment =>
.ST_AsText() as Intersection3D
from dual;
INTERSECTION3D
------------------------------------
T_Vertex(10,5,NULL,NULL,1,2001,NULL)
-- ST_Intersect of line segment and circular arc segment
With data As (
SELECT SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',null) as cString,
SDO_GEOMETRY('LINESTRING(252257.745 5526951.808, 252438.138 5526963.252)',null) as lString
FROM Dual
)
select t_geometry(SDO_GEOM.SDO_Intersection(cString,lString,0.005),0.005,3,1)
.ST_Round(3,3,1)
.geom as iGeom,
T_Segment(lString)
.ST_Intersect(T_Segment(cString),3)
.ST_Round(3)
.ST_SdoGeometry() as iPoint
from data a;
IGEOM
IPOINT
-------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2001,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(252409.364,5526961.427))
SDO_GEOMETRY(2001,NULL, SDO_POINT_TYPE(252409.364,5526961.427,NULL),NULL,NULL)
-- ST_Intersect two 3D segments: No intersection in Z
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0,0, 500, 100,100,1000)) as line1,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,0,1000, 0,100, 501)) as line2
from dual
)
select f.intersection.ST_IsNull() as intersectAlwaysNull,
f.intersection.id as intersectMarker,
f.intersection.ST_AsText() as IntersectCoordValues
from (select T_Segment(line1)
.ST_Intersect(
T_Segment(line2)
) as intersection
from data a
) f;
INTERSECTALWAYSNULL INTERSECTMARKER INTERSECTCOORDVALUES
------------------- --------------- ----------------------------------------
1 -99 T_Vertex(NULL,NULL,NULL,NULL,-99,1,NULL)
-- ST_Intersect 3D has intersection in Z
-- Compare to SDO_GEOM.SDO_Intersection
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0, 0, 0, 100,100,10)) as line1,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,100,10, 100, 0, 0)) as line2
from dual
)
select sdo_geom.sdo_intersection(line1,line2,0.005) as geom from data
union all
select T_Segment(line1)
.ST_Intersect(
T_Segment(line2)
)
.ST_Round(3,3)
.ST_SdoGeometry(3) as int3D
from data a;
GEOM
---------------------------------------------------------------------------------------------
SDO_GEOMETRY(3001,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(50,50,0))
SDO_GEOMETRY(3001,NULL, SDO_POINT_TYPE(50,50,5),NULL,NULL)
NOTES
Calculations are always planar.
3D computations use T_Vector3D object methods.
TODO
Enable calculation of intersection between geodetic/geographic segments.
Support intersections including circular arcs
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2011 - Original Coding
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Intersect2CircularArcs -- Computes intersecton point between two 2D CircularArc segments.
SYNOPSIS
Member Function ST_Intersect2CircularArcs(
p_segment in &&INSTALL_SCHEMA..T_Segment,
p_unit in varchar2 default NULL)
Return &&INSTALL_SCHEMA..T_Segment Deterministic(
DESCRIPTION
This function computes the intersection point between the underlying circularArc segment and the provided circularArc segment.
If one of the segments is a LineString, ST_Intersect is called.
ARGUMENTS
p_segment (T_Segment) -- CircularArc Segment that is to be intersected with the current CircularArc object (SELF).
p_unit (varchar2) -- Oracle Unit of Measure for functions such as SDO_DISTANCE.
RESULT
intersection (T_Vertex) -- The intersection point.
EXAMPLE
select &&INSTALL_SCHEMA..t_segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,2),sdo_ordinate_array(0,0,10,10,20,0)))
.ST_Intersect2CircularArcs(
p_segment => &&INSTALL_SCHEMA..t_segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,2),SDO_ORDINATE_ARRAY(9.959,-0.004, 14.719,5.245, 8.133,13.623))),
p_unit => null)
.ST_Round(3) as intersection
from dual;
INTERSECTION
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
&&INSTALL_SCHEMA..T_SEGMENT(NULL,NULL,1,&&INSTALL_SCHEMA..T_VERTEX(14.477,8.942,NULL,NULL,1,2001,NULL,0),NULL,&&INSTALL_SCHEMA..T_VERTEX(1.189,4.729,NULL,NULL,3,2001,NULL,0),2002,NULL,1,&&INSTALL_SCHEMA..T_PRECISIONMODEL(3,3,3,0.005))
NOTES
Two intersections are returned for the two possible points where two circles defined by CircularArcs intersect.
Calculations are always planar.
TODO
Enable calculation of intersection between geodetic/geographic segments.
Return only the actual intersections.
AUTHOR
Simon Greener
HISTORY
Simon Greener - 2011 - Original Coding nuary 2018\
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_IntersectCircularArc -- Computes intersecton point between a CircularArc and a LineString segment.
SYNOPSIS
Member Function ST_IntersectCircularArc(
p_segment in &&INSTALL_SCHEMA..T_Segment,
p_unit in varchar2 default NULL)
Return &&INSTALL_SCHEMA..T_Segment Deterministic(
DESCRIPTION
This function computes the intersection point between a CircularArc and a LineString.
If both of the segments is a LineString, ST_Intersect is called.
ARGUMENTS
p_segment (T_Segment) -- CircularArc Segment that is to be intersected with the current CircularArc object (SELF).
p_unit (varchar2) -- Oracle Unit of Measure for functions such as SDO_DISTANCE.
RESULT
intersection (T_Vertex) -- The intersection point.
EXAMPLE
select &&INSTALL_SCHEMA..t_segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,2),sdo_ordinate_array(0,0,10,10,20,0)))
.ST_IntersectCircularArc(
p_segment => &&INSTALL_SCHEMA..t_segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),SDO_ORDINATE_ARRAY(10,0,10,12))),
p_unit => null)
.ST_Round(3)
.ST_SdoGeometry() as intersection
from dual;
INTERSECTION
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
MDSYS.SDO_GEOMETRY(2002,NULL,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(10,-10,0,0))
NOTES
Two intersections are returned for the two possible points where two circles defined by CircularArcs intersect.
Calculations are always planar.
TODO
Fix as result is incorrect.
Enable calculation of intersection between geodetic/geographic segments.
Return only the actual intersections.
AUTHOR
Simon Greener
HISTORY
Simon Greener - 2011 - Original Coding nuary 2018\
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_IntersectDescription -- Interprets intersection that results from a call to STIntersectionDetail with same parameter values.
SYNOPSIS
Member Function ST_IntersectDescription(p_segment in T_SEGMENT,
p_unit in varchar2 default NULL)
Return T_Vertex Deterministic,
DESCRIPTION
Describes intersection point between two lines.
Internal code is same as STIntersectionDetail with same parameters so see its documentation.
Determines intersections as per STIntersectionDetail but determines nature of intersection ie whether physical, virtual, nearest point on segment etc.
Returned interpretation is one of:
Intersection at End 1 End 2
Intersection at End 1 Start 2
Intersection at Start 1 End 2
Intersection at Start 1 Start 2
Intersection within both segments
Parallel
Unknown
Virtual Intersection Near End 1 and End 2
Virtual Intersection Near End 1 and Start 2
Virtual Intersection Near Start 1 and End 2
Virtual Intersection Near Start 1 and Start 2
Virtual Intersection Within 1 and Near End 2
Virtual Intersection Within 1 and Near Start 2
Virtual Intersection Within 2 and Near End 1
Virtual Intersection Within 2 and Near Start 1
ARGUMENTS
p_segment (T_Segment) -- Segment that is to be intersections with current object (SELF).
p_unit (varchar2) -- Oracle Unit of Measure for functions such as SDO_DISTANCE.
RESULT
intersection (varchar2) -- Intersection description as in DESCRIPTION above.
EXAMPLE
select T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_IntersectDescription(p_segment =>
.ST_AsText() as Intersection
from dual;
INTERSECTION
------------------------------------
T_Vertex(10,5,NULL,NULL,1,2001,NULL)
select T_Segment(
sdo_geometry('LINESTRING(0 0,10 10)',null)
).ST_IntersectDescription(
T_Segment(
sdo_geometry('LINESTRING(0 10,10 0)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(5,5,NULL,NULL,0,2001,NULL),
Mid(5,5,NULL,NULL,-1,2001,NULL),
End(5,5,NULL,NULL,-2,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
-- Physical 1, virtual 2
select T_Segment(
sdo_geometry('LINESTRING(0 0,10 0)',null)
).ST_IntersectDescription(
T_Segment(
sdo_geometry('LINESTRING(-5 10,-2 7)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(5,0,NULL,NULL,0,2001,NULL),
Mid(5,0,NULL,NULL,-1,2001,NULL),
End(-2,7,NULL,NULL,-2,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
-- Virtual 1, Virtual 2
select T_Segment(
sdo_geometry('LINESTRING(10 10,5 5)',null)
).ST_IntersectDescription(
T_Segment(
sdo_geometry('LINESTRING(-10 10,-5 5)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(0,0,NULL,NULL,0,2001,NULL),
Mid(5,5,NULL,NULL,-1,2001,NULL),
End(-5,5,NULL,NULL,-2,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
-- Parallel
select T_Segment(
sdo_geometry('LINESTRING(10 10,0 10)',null)
).ST_IntersectDescription(
T_Segment(
sdo_geometry('LINESTRING(-10 5,-5 5)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(,,NULL,NULL,-9,2001,NULL),
Mid(,,NULL,NULL,NULL,2001,NULL),
End(,,NULL,NULL,NULL,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
NOTES
Calculations are always planar.
AUTHOR
Simon Greener
HISTORY
Simon Greener - March 2018 - Original TSQL Coding for SQL Server.
Simon Greener - June 2011 - Original Coding
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_IntersectDetail -- Computes intersecton point between two 2D segments.
SYNOPSIS
Member Function ST_IntersectDetail(p_segment in T_SEGMENT,
p_unit in varchar2 default NULL)
Return T_Vertex Deterministic,
DESCRIPTION
This function computes the intersection point between the underlying segment and the provided segment.
If segments are parallel an empty T_VERTEX is returned with T_VERTEX.id set to -9.
The intersection point is always returned in startCoord of returned T_Segment.
This version of ST_Intersect returns details about the nature of the Intersection.
These details include the coding of the returned midCoord and endCoords as follows:
1. If intersection is physical both are set to startCoord (cf ST_Intersect).
2. If intersection is physical in SELF but virtual in p_segment, midCoord is set to physical intersection point, and endCoord is set to projected (virtual) point from p_segment.
3. If intersection is physical in p_segment but virtual in SELF, midCoord is set to projected (virtual) point from SELF, and endCoord is set to physical intersection point in p_segment.
4. If intersection is virtual in p_segment and SELF, midCoord and endCoord are both set to virtual point (same as startCoord).
ARGUMENTS
p_segment (T_Segment) -- Segment that is to be intersections with current object (SELF).
p_unit (varchar2) -- Oracle Unit of Measure for functions such as SDO_DISTANCE.
RESULT
intersection (T_Vertex) -- The intersection point or empty point with id = -9 for parallel segments.
EXAMPLE
select T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_IntersectDetail(p_segment =>
.ST_AsText() as Intersection
from dual;
INTERSECTION
------------------------------------
T_Vertex(10,5,NULL,NULL,1,2001,NULL)
select T_Segment(
sdo_geometry('LINESTRING(0 0,10 10)',null)
).ST_IntersectDetail(
T_Segment(
sdo_geometry('LINESTRING(0 10,10 0)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(5,5,NULL,NULL,0,2001,NULL),
Mid(5,5,NULL,NULL,-1,2001,NULL),
End(5,5,NULL,NULL,-2,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
-- Physical 1, virtual 2
select T_Segment(
sdo_geometry('LINESTRING(0 0,10 0)',null)
).ST_IntersectDetail(
T_Segment(
sdo_geometry('LINESTRING(-5 10,-2 7)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(5,0,NULL,NULL,0,2001,NULL),
Mid(5,0,NULL,NULL,-1,2001,NULL),
End(-2,7,NULL,NULL,-2,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
-- Virtual 1, Virtual 2
select T_Segment(
sdo_geometry('LINESTRING(10 10,5 5)',null)
).ST_IntersectDetail(
T_Segment(
sdo_geometry('LINESTRING(-10 10,-5 5)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(0,0,NULL,NULL,0,2001,NULL),
Mid(5,5,NULL,NULL,-1,2001,NULL),
End(-5,5,NULL,NULL,-2,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
-- Parallel
select T_Segment(
sdo_geometry('LINESTRING(10 10,0 10)',null)
).ST_IntersectDetail(
T_Segment(
sdo_geometry('LINESTRING(-10 5,-5 5)',null)
)
).ST_AsText() as iPoint
from dual;
IPOINT
-----------------------------------------
SEGMENT(NULL,NULL,1,
Start(,,NULL,NULL,-9,2001,NULL),
Mid(,,NULL,NULL,NULL,2001,NULL),
End(,,NULL,NULL,NULL,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
NOTES
Calculations are always planar.
TODO
Enable calculation of intersection between geodetic/geographic segments.
Support intersections including circular arcs
AUTHOR
Simon Greener
HISTORY
Simon Greener - June 2011 - Original Coding
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isCircularArc -- Checks if segment is a CircularArc
SYNOPSIS
Member Function ST_isCircularArc
Return Integer Deterministic,
DESCRIPTION
If segment start/mid/end coordinates are all not null then is CircularString.
RESULT
BOOLEAN (INTEGER) -- 1 if segment is CircularArc.
EXAMPLE
with data as (
select T_Segment(
SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',null)
) as circular_segment
from dual
)
select a.circular_segment.ST_isCircularArc() as isCString
from data a;
ISCSTRING
---------
1
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isCollinear -- Checks if two segments' coordinates are collinar.
SYNOPSIS
Member Function ST_isCollinear(p_segment in &&INSTALL_SCHEMA..T_SEGMENT)
Return Integer Deterministic
DESCRIPTION
This function determines if the two segments (underlying and supplied) have coordinates that fall in a line (collinear)
The segments should touch with a end/start relationship.
Supplied segments cannot be CircularArcs.
ARGUMENTS
p_segment (T_Segment) -- Other, possibly connected, segment (LineString not CircularString)
RESULT
boolean (integer) -- 1 is true (collinear) 0 if false.
NOTES
Ignores any measure ordinates.
Calculations are always planar.
EXAMPLE
-- 0. Uses T_Vector3D to compute whether segments can be merged by sharing vertex and having same normalized vectors.
with data as (
select sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 100,100)) as line1,
sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,100, 200,200)) as line2
from dual
UNION ALL
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 0, 100,100,10)) as line1,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,100,10, 200,200,20)) as line2
from dual
)
select T_Segment(a.line1)
.ST_IsCollinear(p_segment=>T_Segment(a.line2)) as isCollinear
from data a;
MS2
----------------
0
1
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 -- Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isEmpty -- Checks if segment has any valid data.
SYNOPSIS
Member Function ST_isEmpty
Return INTEGER Deterministic,
DESCRIPTION
If segment object data values are NULL returns 1 (TRUE) ie is Empty; else 0 (False)
cf "LINESTRING EMPTY" EKT.
RESULT
BOOLEAN (INTEGER) -- 1 if segment has no non null values; 0 if has values
EXAMPLE
select T_Segment().ST_AsText() as TSegment,
T_Segment().ST_isEmpty() as isEmpty
from dual;
TSEGMENT
-------------------------------------------------------------------------------------------------------------------------------------- --------
SEGMENT(NULL,NULL,NULL,Start(NULL,NULL,NULL,NULL,NULL,2001,NULL),End(NULL,NULL,NULL,NULL,NULL,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL) 0
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isHorizontal - Returns true if the segment is horizonal or parallel to X axis.
SYNOPSIS
Member Function ST_isHorizontal
Return integer Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function checks if segment is horizontal or parallel to X axis
RESULT
true/false (integer) -- 1 is horizontal 0 otherwise
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,10 0)',NULL)).ST_isHorizontal() as isHorizontal
from dual;
ISHORIZONTAL
------------
1
select T_Segment(sdo_geometry('LINESTRING(0 0,10 10)',NULL)).ST_isHorizontal() as isHorizontal
from dual;
ISHORIZONTAL
------------
0
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isPointOnSegment -- Checks if supplied point falls on the underlying segment.
SYNOPSIS
ST_isPointOnSegment(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_unit in varchar2)
Return integer deterministic
DESCRIPTION
This function checks if the supplied point falls on the underlying segment.
Computes for LineString or CircularString.
NOTES
Geodetic/geographic CircularArc segments treated as planar
INPUTS
p_vertex (t_vertex) - Point on to linestring or CircularString.
p_unit (varchar2) - Unit of measure for SRID.
RESULT
booelan (integer) -- 1 if point on segment; 0 otherwise
EXAMPLE
select T_Segment(MDSYS.SDO_GEOMETRY(3302,8307,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(147.41,-43.132,100, 147.5,-43.387,30000)))
.ST_isPointOnSegment (
t_vertex(SDO_GEOMETRY(3301,8307,SDO_POINT_TYPE(147.44551945,-43.23290209,11930.116),NULL,NULL))
) as is_on
from dual union all
select T_Segment(MDSYS.SDO_GEOMETRY(3302,8307,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(147.41,-43.132,100, 147.5,-43.387,30000)))
.ST_isPointOnSegment (
t_vertex(SDO_GEOMETRY(3301,8307,SDO_POINT_TYPE(147.445,-43.232,11930.116),NULL,NULL))
) as is_on
from dual;
IS_ON
----------
1
0
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2008-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isReversed -- Returns 1 (true) if the underlying segment has its start/end coordinates reversed to supplied segment.
SYNOPSIS
Member Function ST_isReversed(p_other IN &&INSTALL_SCHEMA..T_SEGMENT)
Return Integer Deterministic,
DESCRIPTION
Compares underlying T_SEGMENT's start and end coordinates against those of the supplied segment parameter.
If self.start = p_other.end and self.end = p_other.start, the function returns 1 (True) otherwise 0 (False).
If SDO_GTYPE is null, examines coordinates to see if W ordinate is not null.
ARGUMENTS
p_other (T_Segment) -- Compared to SELF with return of 1 if reversed start/end coordinates
RESULT
True/False (Integer) -- 1 if two segments have opposite direction.
select T_Segment(
sdo_geometry('LINESTRING(0 0,10 10)',null)
).ST_isReversed(
p_other =>T_Segment(sdo_geometry('LINESTRING(10 10,0 0)',null))
) as isReversed
from dual;
ISREVERSED
----------
1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_isVertical - Returns true if the segment is Vertical or parallel to Y axis.
SYNOPSIS
Member Function ST_isVertical
Return integer Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function checks if segment is vertical or parallel to Y axis
RESULT
true/false (integer) -- 1 is Vertical 0 otherwise
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,0 10)',NULL)).ST_isVertical() as isVertical
from dual;
ISVERTICAL
----------
1
select T_Segment(sdo_geometry('LINESTRING(0 0,10 10)',NULL)).ST_isVertical() as isVertical
from dual;
ISVERTICAL
----------
0
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Length -- Returns Length of the segment
SYNOPSIS
Member Function ST_Length(p_unit in varchar2 DEFAULT NULL)
Return Number Deterministic
DESCRIPTION
This function computes a length from the underlying T_SEGMENT.
Result is in the distance units of the SDO_SRID, or in p_units where supplied.
ARGUMENTS
p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.
RESULT
distance (Number) -- Distance in SRID unit of measure or in supplied units (p_unit)
EXAMPLE
TO DO
-- Simple length for mixed planar and geodetic data
with data as (
select 'Planar LineString' as test, sdo_geometry('LINESTRING(0 0,10 10)',null) as geom
from dual
union all
select 'Geo LineString' as test, sdo_geometry('LINESTRING(147.50 -43.132,147.41 -43.387)',4326) as geom
from dual
union all
select 'Planar CircularString' as test,
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)) as geom
from dual
)
select a.test,
T_Segment(a.geom).ST_Length(p_unit=>NULL) as l_in_meters,
T_Segment(a.geom).ST_Length(p_unit=>'unit=KM') as l_in_km
from data a;
TEST L_IN_METERS L_IN_KM
--------------------- ----------- ----------
Planar LineString 14.14213562 14.14213562
Geo LineString 29257.27111 29.25727111
Planar CircularString 506.8892138 0.5068892138
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_LineSubstring -- Creates a new segment by cutting out the line defined by p_start_fraction and p_end_fraction.
SYNOPSIS
Member Function ST_LineSubstring(p_start_fraction In Number Default 0.0,
p_end_fraction In Number Default 1.0,
p_unit In Varchar2 Default NULL)
Return &&INSTALL_SCHEMA..T_Segment Deterministic
DESCRIPTION
Supplied with two ratio values between (0.0 -> 1.0), this function uses those values to find the
points along its segment where they lie. If offset values of 0.0 and 1.0 are supplied, the underlying
segment is returned. Otherwise, the function finds the position of the point defined by p_start_fraction
and the point defined by p_end_fraction and creates a new segment based on those points.
For circular arcs a new midCoord is created at position p_start_fraction + (p_end_fraction-p_start_Fraction)/2.0.
If p_start_fraction == p_end_fraction a single point is returned in the T_Segment's startCoord with the others being NULL.
The substring operation uses length and not LRS measure.
Any Z and M ordinates are calculated by ratio.
ARGUMENTS
p_start_fraction (Number) -- A value between 0 and 1, from the start vertex of the segment,
which describes the position of the first point in the substring.
p_end_fraction (Number) -- A value > p_start_fraction, from the start vertex of the segment,
which describes the position of the last point in the substring.
p_unit (Varchar2) -- If NULL, the calculations are done using the underlying projection default units.
If an Oracle Unit of Measure is supplied (eg unit=M) that is value for the SRID,
this value is used when calculating the p_offset distance.
RESULT
segment (T_Segment) - - New segment between the start and end measures.
EXAMPLE
-- Substring of XYZ LineString.
With data as (
select SDO_GEOMETRY(3002,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(562046.642,1013077.602,0, 562032.193,1013252.074,0.035)) as geom
from dual
)
select T_Segment(a.geom)
.ST_LineSubstring(p_start_fraction => 0.25,
p_end_fraction => 0.75,
p_unit => 'unit=M'
)
.ST_Round(3)
.ST_SdoGeometry() as substring
from data a;
SUBSTRING
---------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(562043.03,1013121.22,0.009,562035.805,1013208.456,0.026))
-- Fractions equal...
With data as (
select SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(562046.642,1013077.602,0, 562032.193,1013252.074,0.035)) as geom
from dual
)
select T_Segment(a.geom)
.ST_LineSubstring(p_start_fraction => 0.5,
p_end_fraction => 0.5,
p_unit => 'unit=M'
)
.ST_Round(3)
.ST_SdoGeometry() as substring
from data a;
SUBSTRING
----------------------------------------------------------------------------------
SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562039.418,1013164.838,0.018),NULL,NULL)
-- Geodetic.
With data as (
select sdo_geometry(2002,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,147.41,-43.387)) as geom
from dual
union all
select sdo_geometry(3302,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,100.0,147.41,-43.387,30000.0)) as geom
from dual
union all
select sdo_geometry(3002,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,100.0, 147.41,-43.387,30000.0)) as geom
from dual
)
select T_Segment(a.geom)
.ST_LineSubstring(p_start_fraction => 0.5,
p_end_fraction => 0.9,
p_unit => 'unit=M'
)
.ST_Round(8)
.ST_SdoGeometry() as substring
from data a;
SUBSTRING
-------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.455,-43.2595,147.419,-43.3615))
SDO_GEOMETRY(3302,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.455,-43.2595,15050,147.419,-43.3615,27010))
SDO_GEOMETRY(3002,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.455,-43.2595,15050,147.419,-43.3615,27010))
-- Circular Arc line string
With data as (
select sdo_geometry(2002,NULL,NULL,
sdo_elem_info_array(1,2,2),
sdo_ordinate_array(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)) as geom
from dual
)
select T_Segment(a.geom)
.ST_LineSubstring(p_start_fraction => 0.25,
p_end_fraction => 0.75,
p_unit => 'unit=M'
)
.ST_Round(3)
.ST_SdoGeometry() as substring
from data a;
SUBSTRING
------------------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252256.627,5527032.786,252373.991,5527032.738,252400.046,5526918.303))
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_LRS_Add_Measure -- Adds measures to 2D segment linestring/circularString
SYNOPSIS
Member Function ST_LRS_Add_Measure(p_start_measure IN Number Default NULL,
p_end_measure IN Number Default NULL,
p_unit IN VarChar2 Default NULL)
Return &&INSTALL_SCHEMA..T_Segment deterministic,
DESCRIPTION
Takes a 2D geometry and assigns supplied measures to the start/end vertices
and adds proportioned measure values to all vertices in between.
If p_start_measure/p_end_measure are null, length is used to add measures.
ARGUMENTS
p_start_measure (Number) - Measure defining start point for segment .
p_end_measure (Number) - Measure defining end point for segment.
p_unit (VarChar2) - Unit of measure for distance calculations.
RESULT
segment (T_segment) -- Measured segment
EXAMPLE
select t_geometry(SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963, 571551.298,321231.412, 572765.519,321322.805, 572739.407,321845.051,
572752.463,322641.476, 573209.428,323398.732, 573796.954,323555.406, 574436.705,323790.416,
574945.895,324051.539, 575128.681,324652.122, 575128.681,325161.311, 575898.993,325213.536,
576238.453,324521.56, 576251.509,321048.626, 575259.242,322615.364, 574306.144,321296.693)),
0.0005,3,1)
.ST_LRS_ADD_Measure(110.0)
.ST_Round(3,3,1,2)
.geom as mGeom
from dual;
MGEOM
---------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3302,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(
571303.231,321126.963,110.0, 571551.298,321231.412,377.21, 572765.519,321322.805,1586.05, 572739.407,321845.051,2105.16,
572752.463,322641.476,2895.92, 573209.428,323398.732,3773.96, 573796.954,323555.406,4377.62, 574436.705,323790.416,5054.23,
574945.895,324051.539,5622.33, 575128.681,324652.122,6245.56, 575128.681,325161.311,6751.06, 575898.993,325213.536,7517.55,
576238.453,324521.56,8282.72, 576251.509,321048.626,11730.53, 575259.242,322615.364,13571.62, 574306.144,321296.693,15186.88))
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original Coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_LRS_Compute_Measure -- Computes measure for supplied p_vertex against underlying LRS measured T_SEGMENT.
SYNOPSIS
Member Function ST_LRS_Compute_Measure(p_vertex In &&INSTALL_SCHEMA..T_Vertex,
p_unit IN varchar2 Default null)
Return Number Deterministic
DESCRIPTION
This function computes a measure value for the supplied point (must be a point
on the underlying segment). All calculations are done on 2D versions of segment
and point.
ARGUMENTS
p_vertex (T_VERTEX) - Finds p_vertex on LRS Segment and computes M ordinate
p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.
RESULT
-- Compute measure of point
with data as (
select 'Planar LineString' as test,
sdo_geometry(3302,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,1,1.1,6,6,5.95)) as geom,
sdo_geometry('POINT(5 4.9)',null) as dGeom
from dual
union all
select 'Geo LineString' as test,
sdo_geometry(3302,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,100.0,147.41,-43.387,30000.0)) as geom,
sdo_geometry('POINT(147.3 -43.2)',4326) as dGeom
from dual
)
select a.test,
T_Segment(a.geom).ST_LRS_Compute_Measure(p_vertex=>T_VERTEX(a.dGeom),p_unit=>NULL) as measure
from data a;
TEST MEASURE
----------------- ----------
Planar LineString 4.93180695
Geo LineString 18427.043
TODO
Support CircularString (Circular Arcs).
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_LRS_Dim -- Tests segment to see if coordinates include a measure ordinate and returns measure ordinate's position.
SYNOPSIS
Member Function ST_LRS_Dim
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc) measure ordinate position (L) and returns it.
If SDO_GTYPE is null, examines coordinates to see if W ordinate is not null.
RESULT
dimension (integer) -- L from DLNN.
EXAMPLE
select T_Segment(sdo_geometry(3302,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5, -42.5,0.0, 147.6, -42.5, 10923.0))).ST_LRS_Dim() as lrs_dim
from dual;
LRS_DIM
-------
3
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_LRS_isMeasured -- Tests to see if segment is measured.
SYNOPSIS
Member Function ST_LRS_isMeasured
Return Integer Deterministic,
With data as (
Select T_GEOMETRY(sdo_geometry('LINESTRING(0 0,10 0,10 5,10 10,5 10,5 5)',null),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual UNION ALL
Select T_GEOMETRY(sdo_geometry(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,1,10,0,2,10,5,3,10,10,4,5,10,5,5,5,6)),0.005,3,1) as tgeom From Dual
)
select a.tgeom.ST_GType() as sdo_gtype,
a.tgeom.ST_LRS_isMeasured() as isMeasured
from data a;
SDO_GTYPE GEOMTYPE COORDDIM isMeasured
--------- -------------- -------- ----------
2 ST_LINESTRING 2 0
2 ST_LINESTRING 3 0
2 ST_LINESTRING 3 1
DESCRIPTION
Examines SDO_GTYPE (ST_LRS_Dim) to see if sdo_gtype has measure ordinate eg 3302 not 3002.
RESULT
BOOLEAN (Integer) -- 1 is measure ordinate exists, 0 otherwise.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_LRS_Measure_Length -- Returns difference between end measure and start measure of segment.
SYNOPSIS
Member Function ST_LRS_Measure_Length( p_unit IN VARCHAR2 Default NULL )
Return Number Deterministic
DESCRIPTION
This function computes length by subtracting end and start measure ordinates.
If segment is without measures length is returned.
RESULT
distance (Number) -- Difference between end and start measure ordinates (delta) or segment length.
EXAMPLE
with data as (
select 'Planar LineString' as test,
sdo_geometry(3302,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,1,1.1,6,6,5.95)) as geom
from dual
union all
select 'Geo LineString' as test,
sdo_geometry(3302,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,100.0,147.41,-43.387,30000.0)) as geom
from dual
)
select a.test,
T_Segment(a.geom)
.ST_LRS_Measure_Length() as measureLength
from data a;
TEST MEASURELENGTH
----------------- -------------
Planar LineString 4.85
Geo LineString 29900
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_MaxX - Returns the largest X ordinate value from the underlying segments minimum bounding rectangle (MBR).
SYNOPSIS
Member Function ST_MaxX
Return SDO_GEOMETRY Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function returns the largest X ordinate value held by the startCoord,midCoord or endCoord vertices.
RESULT
ordinate (number) -- Largest x ordinate value
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,0.8 0.8)',NULL)).ST_MaxX() as maxX
from dual;
MAXX
----
0.8
SEE ALSO
T_MBR object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2011 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_MaxY - Returns the largest Y ordinate value from the underlying segments minimum bounding rectangle (MBR).
SYNOPSIS
Member Function ST_MaxY
Return SDO_GEOMETRY Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function returns the largest Y ordinate value held by the startCoord,midCoord or endCoord vertices.
RESULT
ordinate (number) -- Largest x ordinate value
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,0.8 0.8)',NULL)).ST_MaxY() as maxX
from dual;
MAXX
----
0.8
SEE ALSO
T_MBR object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2011 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_MBR - Returns optimized rectangle sdo_geometry representnig the underlying segment's minimum bounding rectangle (MBR).
SYNOPSIS
Member Function ST_MBR
Return SDO_GEOMETRY Determinsitic
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,0.8 0.8)',NULL)).ST_MBR() as mbrGeom
from dual;
MBRGEOM
--------------------------------------------------------------------------------------
SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(0,0,0.8,0.8))
DESCRIPTION
Supplied with a non-NULL segment, this function returns the envelope or minimum bounding rectangle as a polygon geometry with one optimized rectangle exterior ring.
RESULT
MBR Geometry (sdo_geometry) -- Single Polygon with Optimized Rectangle Exterior Ring.
SEE ALSO
T_MBR object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2011 - Converted to T_GEOMETRY from GEOM package.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Merge -- Merge two straight line segments - does not support circular arc segments
SYNOPSIS
Member Function ST_Merge(p_segment in &&INSTALL_SCHEMA..T_SEGMENT)
Return t_segment Deterministic
DESCRIPTION
This function determines if the two segments (underlying and supplied) for a straight line (no bend)
and touch as a start/end coordinate pair.
New segment is created from start/end coordinates.
ARGUMENTS
p_segment (T_Segment) -- Other, possibly connected, segment
RESULT
segment (T_Segment) -- New segment.
NOTES
Ignores any measure ordinates.
Calculations are always planar.
EXAMPLE
-- 0. Uses T_Vector3D to compute whether segments can be merged by sharing vertex and having same normalized vectors.
with data as (
select sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 100,100)) as line1,
sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,100, 200,200)) as line2
from dual
UNION ALL
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 0, 100,100,10)) as line1,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(100,100,10, 200,200,20)) as line2
from dual
)
select a.line1.get_Dims() as dims,
t_vector3d(T_Segment(a.line1))
.Normalize()
.Subtract(
t_vector3d(
T_Segment(a.line2))
.Normalize())
.AsText()as ms2
from data a;
DIMS MS2
---- ----------------
2 T_VECTOR3D(x=0,y=0,z=NULL}
3 T_VECTOR3D(x=0,y=0,z=0}
-- 1. ST_Merge End/Start collinear in 2D and 3D
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 0, 10,10,10)) as first_line,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(10,10,10, 20,20,20)) as second_line
from dual
)
select 2 as dims,
T_Segment( a.first_line, 1 ).ST_To2D()
.ST_Merge( T_Segment( a.second_line, 2 ).ST_To2D() ).ST_AsText() as mergedSegment
from data a
union all
select 3 as dims,
T_Segment( a.first_line, 1 ).ST_Merge( T_Segment( a.second_line, 2 ) ).ST_AsText() as mergedSegment
from data a;
DIMS MERGEDSEGMENT
---- -------------------------------------------------------------------------------------------------------------------
2 SEGMENT(NULL,NULL,1,Start(1,0,0,NULL,NULL,2001,NULL),End(2,20,20,NULL,NULL,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
3 SEGMENT(NULL,NULL,1,Start(1,0,0,0,NULL,3001,NULL),End(2,20,20,20,NULL,3001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
-- 2. ST_Merge End/Start collinear in 2D but not 3D
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 0, 10,10,10)) as first_line,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(10,10,10, 20,20,21)) as second_line
from dual
)
select 2 as dims,
T_Segment( a.first_line, 1 ).ST_To2D()
.ST_Merge( T_Segment( a.second_line, 2 ).ST_To2D() ).ST_AsText() as mergedSegment
from data a
union all
select 3 as dims,
T_Segment( a.first_line ).ST_Merge( T_Segment( a.second_line, 2 ) ).ST_AsText() as mergedSegment
from data a;
DIMS MERGEDSEGMENT
---- ---------------------------------------------------------------------------------------------------------------------------------------------
2 SEGMENT(NULL,NULL,1,Start(1,0,0,NULL,NULL,2001,NULL),End(2,20,20,NULL,NULL,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
3 SEGMENT(NULL,NULL,0,Start(1,0,0,0,NULL,3001,NULL),Mid(2,10,10,10,NULL,3001,NULL),End(2,20,20,21,NULL,3001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
-- 3. ST_Merge where relationship is end/end collinear
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array( 0, 0, 0, 10,10,10)) as first_line,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(20,20,20, 10,10,10)) as second_line
from dual
)
select 2 as dims,
T_Segment( a.first_line, 1 ).ST_To2D()
.ST_Merge( T_Segment( a.second_line, 2 ).ST_To2D() ).ST_AsText() as mergedSegment
from data a
union all
select 3 as dims,
T_Segment( a.first_line, 1 ).ST_Merge( T_Segment( a.second_line, 2 ) ).ST_AsText() as mergedSegment
from data a;
DIMS MERGEDSEGMENT
---- -------------------------------------------------------------------------------------------------------------------
2 SEGMENT(NULL,NULL,1,Start(1,0,0,NULL,NULL,2001,NULL),End(1,20,20,NULL,NULL,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
3 SEGMENT(NULL,NULL,1,Start(1,0,0,0,NULL,3001,NULL),End(1,20,20,20,NULL,3001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
-- 4. ST_Merge where relationship is start/start collinear
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(10,10,10, 0, 0, 0)) as first_line,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(20,20,20, 10,10,10)) as second_line
from dual
)
select 2 as dims,
T_Segment( a.first_line, 1 ).ST_To2D()
.ST_Merge( T_Segment( a.second_line, 2 ).ST_To2D() ).ST_AsText() as mergedSegment
from data a
union all
select 3 as dims,
T_Segment( a.first_line, 1 ).ST_Merge( T_Segment( a.second_line, 2 ) ).ST_AsText() as mergedSegment
from data a;
DIMS MERGEDSEGMENT
---- --------------------------------------------------------------------------------------------------------------------------------------
2 SEGMENT(NULL,NULL,NULL,Start(NULL,NULL,NULL,NULL,NULL,NULL,NULL),End(NULL,NULL,NULL,NULL,NULL,NULL,NULL),SDO_GTYPE=NULL,SDO_SRID=NULL)
3 SEGMENT(NULL,NULL,NULL,Start(NULL,NULL,NULL,NULL,NULL,NULL,NULL),End(NULL,NULL,NULL,NULL,NULL,NULL,NULL),SDO_GTYPE=NULL,SDO_SRID=NULL)
-- 5. ST_Merge where identical (returns first_line)
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,0, 10,10,10)) as first_line,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,0, 10,10,10)) as second_line
from dual
)
select 2 as dims,
T_Segment( a.first_line, 1 ).ST_To2D()
.ST_Merge( T_Segment( a.second_line, 2 ).ST_To2D() ).ST_AsText() as mergedSegment
from data a
union all
select 3 as dims,
T_Segment( a.first_line, 1 ).ST_Merge( T_Segment( a.second_line, 2 ) ).ST_AsText() as mergedSegment
from data a;
DIMS MERGEDSEGMENT
---- -------------------------------------------------------------------------------------------------------------------
2 SEGMENT(NULL,NULL,1,Start(1,0,0,NULL,NULL,2001,NULL),End(2,10,10,NULL,NULL,2001,NULL),SDO_GTYPE=2002,SDO_SRID=NULL)
3 SEGMENT(NULL,NULL,1,Start(1,0,0,0,NULL,3001,NULL),End(2,10,10,10,NULL,3001,NULL),SDO_GTYPE=3002,SDO_SRID=NULL)
-- 6. ST_Merge where no spatial relationship (Returns Empty Segment)
with data as (
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,0, 10,10,10)) as first_line,
sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(11,11,11, 20,20,21)) as second_line
from dual
)
select 2 as dims,
T_Segment( a.first_line, 1 ).ST_To2D()
.ST_Merge( T_Segment( a.second_line, 2 ).ST_To2D() ).ST_AsText() as mergedSegment
from data a
union all
select 3 as dims,
T_Segment( a.first_line, 1 ).ST_Merge( T_Segment( a.second_line, 2 ) ).ST_AsText() as mergedSegment
from data a;
DIMS MERGEDSEGMENT
---- --------------------------------------------------------------------------------------------------------------------------------------
2 SEGMENT(NULL,NULL,NULL,Start(NULL,NULL,NULL,NULL,NULL,NULL,NULL),End(NULL,NULL,NULL,NULL,NULL,NULL,NULL),SDO_GTYPE=NULL,SDO_SRID=NULL)
3 SEGMENT(NULL,NULL,NULL,Start(NULL,NULL,NULL,NULL,NULL,NULL,NULL),End(NULL,NULL,NULL,NULL,NULL,NULL,NULL),SDO_GTYPE=NULL,SDO_SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 -- Original coding.
Simon Greener - August 2018 -- Ensure all cases correct esp for 3D (XYZ)
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_MidPoint - Computes, and returns, the midpoint of the segment
SYNOPSIS
Member Function ST_MidPoint
Return t_vertex Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function computes and returns its mid Point.
If CircularArc, mid point is point at mid length distance from start.
RESULT
point (t_vertex) -- The midpoint of the segment
EXAMPLE
select &&INSTALL_SCHEMA..T_Segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,1)))
.ST_midPoint()
.ST_SdoGeometry() as mPoint
from dual;
MPOINT
--------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(0.5, 0.5, NULL), NULL, NULL)
select &&INSTALL_SCHEMA..T_Segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,2),sdo_ordinate_array(0,0,10,10,20,0)))
.ST_midPoint()
.ST_SdoGeometry() as mPoint
from dual;
MPOINT
------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(10, 10, NULL), NULL, NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_MinX - Returns the smallest X ordinate value from the underlying segments minimum bounding rectangle (MBR).
SYNOPSIS
Member Function ST_MinX
Return SDO_GEOMETRY Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function returns the smallest X ordinate value held by the startCoord,midCoord or endCoord vertices.
RESULT
ordinate (number) -- Smallest
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,0.8 0.8)',NULL)).ST_MinX() as minX
from dual;
MINX
----
0
SEE ALSO
T_MBR object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2011 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_MinY - Returns the smallest Y ordinate value from the underlying segments minimum bounding rectangle (MBR).
SYNOPSIS
Member Function ST_MinY
Return SDO_GEOMETRY Determinsitic
DESCRIPTION
Supplied with a non-NULL segment, this function returns the smallest Y ordinate value held by the startCoord,midCoord or endCoord vertices.
RESULT
ordinate (number) -- Smallest
EXAMPLE
select T_Segment(sdo_geometry('LINESTRING(0 0,0.8 0.8)',NULL)).ST_MinY() as minX
from dual;
MINY
----
0
SEE ALSO
T_MBR object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2011 - Original coding
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_OffsetBetween - Computes offset point on the bisector between two vertices.
SYNOPSIS
Member Function ST_OffsetBetween(p_segment in number,
p_offset in number,
p_unit In Integer Default NULL)
Return &&INSTALL_SCHEMA..T_Vertex Deterministic
DESCRIPTION
Supplied with a second segment (p_segment), this function computes the bisector
between the two segments and then creates a new vertex at a distance of p_offset
from the intersection point. If an offset value of 0.0 is supplied, the
intersection point is returned. If the p_offset value is <> 0, the function computes a new
position for the point at a distance of p_offset on the left (-ve) or right (+ve) side
of the segment.
The returned vertex's ordinate values are rounded using the supplied tolerance.
ARGUMENTS
p_segment (number) - A segment that touches the current segment at one end point.
p_offset (number) - The perpendicular distance to offset the point generated using p_ratio.
A negative value instructs the function to offet the point to the left (start-end),
and a positive value to the right.
p_unit (varchar2) - If NULL, the calculations are done using the underlying projection default units.
If an Oracle Unit of Measure is supplied (eg unit=M) that is value for the SRID,
- this value is used when calculating the p_offset distance.
RESULT
point (T_Vertex) - New point on bisection point or along bisector line with optional perpendicular offset.
EXAMPLE
-- Planar
With data as (
select SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(561981.279,1013120.171,0.00, 562044.981,1013076.691,77.1)) as sGeom,
SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(562044.981,1013076.691,77.1, 562024.253,1013138.371,142.2)) as nGeom
from dual
)
select 3 as dims,
CAST('Start Segment'
as
varchar2(30)) as description,
a.sGeom as offsetBetween
from data a
Union All
select 3 as dims,
CAST('Next Segment'
as
varchar2(30)) as description,
a.nGeom as offsetBetween
from data a
Union All
select a.sGeom.get_dims() as dims,
CAST('Offset Point @' || t.IntValue
as
varchar2(30)) as description,
T_Segment(a.sGeom)
.ST_OffsetBetween(
p_segment => T_Segment(a.nGeom),
p_offset => t.IntValue,
p_unit => 'unit=M')
.ST_Round(3)
.ST_SdoGeometry() as OffsetBetween
from data a,
table(tools.generate_series(-5,5,5)) t;
DIMS DESCRIPTION OFFSETBETWEEN
---- ----------------- ----------------------------------------------------------------------------------------------------------------------------------------
3 Start Segment SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(561981.279,1013120.171,0,562044.981,1013076.691,77.1))
3 Next Segment SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(562044.981,1013076.691,77.1,562024.253,1013138.371,142.2))
3 Offset Point @-5 SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562041.963,1013080.677,77.1),NULL,NULL)
3 Offset Point @0 SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562044.981,1013076.691,77.1),NULL,NULL)
3 Offset Point @5 SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562047.999,1013072.705,77.1),NULL,NULL)
-- Geodetic
With data as (
select SDO_GEOMETRY(3302,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.7868589596,-45.0326616056,0.0, 147.7876729555,-45.0330473956,77.1)) as sGeom,
SDO_GEOMETRY(3302,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.7876729555,-45.0330473956,77.1, 147.787402221,-45.032494027,142.2)) as nGeom
from dual
)
select 3 as dims,
CAST('Start Segment'
as
varchar2(20)) as description,
a.sGeom as offsetBetween
from data a
Union All
select 3 as dims,
CAST('Next Segment'
as
varchar2(20)) as description,
a.nGeom as offsetBetween
from data a
Union All
select a.sGeom.get_dims() as dims,
CAST('Offset Point @' || t.IntValue
as
varchar2(20)) as description,
T_Segment(a.sGeom)
.ST_OffsetBetween(
p_segment => T_Segment(a.nGeom),
p_offset => t.IntValue,
p_unit => 'unit=M') -- if 3D geodetic, compute as planar otherwise Oracle error
.ST_Round(8)
.ST_SdoGeometry() as OffsetBetween
from data a,
table(tools.generate_series(-5,5,5)) t;
DIMS DESCRIPTION OFFSETBETWEEN
---- ---------------- ------------------------------------------------------------------------------------------------------------------------------------------------
3 Start Segment SDO_GEOMETRY(3302,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.7868589596,-45.0326616056,0,147.7876729555,-45.0330473956,77.1))
3 Next Segment SDO_GEOMETRY(3302,4326,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.7876729555,-45.0330473956,77.1,147.787402221,-45.032494027,142.2))
3 Offset Point @-5 SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(147.78763353,-45.03301215,NULL),NULL,NULL)
3 Offset Point @0 SDO_GEOMETRY(3301,4326,SDO_POINT_TYPE(147.78767296,-45.0330474,77.1),NULL,NULL)
3 Offset Point @5 SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(147.78771238,-45.03308265,NULL),NULL,NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_OffsetPoint -- Creates a point described by a ratio along the
segment and with a perpendicular offset.
SYNOPSIS
Member Function ST_OffsetPoint(p_ratio in Number,
p_offset in Number,
p_unit In Integer Default NULL)
Return &&INSTALL_SCHEMA..T_Vertex Deterministic
DESCRIPTION
Supplied with a ratio value (0.0 -> 1.0), this function uses that value to find the
point along its segment where it lies. If an offset value of 0.0 is supplied, the
discovered point is returned. If the p_offset value is <> 0, the function computes a new
position for the point at a distance of p_offset on the left (-ve) or right (+ve) side
of the segment.
The returned vertex's ordinate values are rounded using the supplied tolerance.
ARGUMENTS
p_ratio (number) - A value between 0 and 1, from the start vertex of the segment,
which describes the position of the point to be offset.
p_offset (number) - The perpendicular distance to offset the point generated using p_ratio.
A negative value instructs the function to offet the point to the left (start-end),
and a positive value to the right.
p_unit (VARCHAR2) - If NULL, the calculations are done using the underlying projection default units.
If an Oracle Unit of Measure is supplied (eg unit=M) that is value for the SRID,
this value is used when calculating the p_offset distance.
RESULT
vertex (T_VERTEX) - New point on line with optional perpendicular offset.
EXAMPLE
With data as (
select sdo_geometry(3302,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,100.0,147.41,-43.387,30000.0)) as geom
from dual
UNION ALL
select sdo_geometry(2002,4326,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.50,-43.132,147.41,-43.387)) as geom
from dual
)
select a.geom.get_dims() as dims,
t.IntValue as offset,
T_Segment(a.geom)
.ST_OffsetPoint(p_ratio => 0.25,
p_offset => t.IntValue,
p_unit => 'unit=M')
.ST_Round(8)
.ST_SdoGeometry() as offsetPoint
from data a,
table(tools.generate_series(-5,5,5)) t;
DIMS OFFSET OFFSETPOINT
---- ------ --------------------------------------------------------------------------------
3 -5 SDO_GEOMETRY(3301,4326,SDO_POINT_TYPE(152.19245167,-44.85985059,7575),NULL,NULL)
3 0 SDO_GEOMETRY(3301,4326,SDO_POINT_TYPE(147.4775,-43.19575,7575),NULL,NULL)
3 5 SDO_GEOMETRY(3301,4326,SDO_POINT_TYPE(142.76254833,-41.53164941,7575),NULL,NULL)
2 -5 SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(152.19245167,-44.85985059,NULL),NULL,NULL)
2 0 SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(147.4775,-43.19575,NULL),NULL,NULL)
2 5 SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(142.76254833,-41.53164941,NULL),NULL,NULL)
6 rows selected
With data as (
select SDO_GEOMETRY(3302,90000006,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(562046.642,1013077.602,0, 562032.193,1013252.074,0.035)) as geom
from dual
)
select t.IntValue as offset,
T_Segment(a.geom)
.ST_OffsetPoint(p_ratio => 0.25,
p_offset => t.IntValue,
p_unit => 'unit=M')
.ST_Round(3)
.ST_SdoGeometry() as offsetPoint
from data a,
table(tools.generate_series(-5,5,5)) t;
OFFSET OFFSETPOINT
---------- ----------------------------------------------------------------------------------
-5 SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562038.047,1013120.807,0.009),NULL,NULL)
0 SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562043.03,1013121.22,0.009),NULL,NULL)
5 SDO_GEOMETRY(3301,90000006,SDO_POINT_TYPE(562048.013,1013121.633,0.009),NULL,NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Parallel -- Moves segment parallel the provided p_offset distance.
SYNOPSIS
Member Function ST_Parallel(p_offset in Number)
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Computes parallel offset, left or right of underlying geometry.
Circular arcs are not yet correctly handled.
ARGUMENTS
p_offset (Number) -- Value +/- numeric value.
RESULT
New segment (T_SEGMENT) -- Input segment moved parallel by p_offset units
TODO
Check Circular Arc Calculations
EXAMPLE
with data as (
select 'Planar LineString' as test,
sdo_geometry(3302,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,1,1.1,6,6,5.95)) as geom,
5.0 as offset
from dual
union all
select 'Planar CircularString' as test,
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,2), -- Circular Arc line string
SDO_ORDINATE_ARRAY(252230.478,5526918.373, 252400.08,5526918.373,252230.478,5527000.0)) as geom,
-5.0 as offset
from dual
)
select a.test,
T_Segment(a.geom)
.ST_Parallel(p_offset=>a.offset)
.ST_Round(3,3,2,1)
.ST_SdoGeometry() as pGeom
from data a;
TEST PGEOM
--------------------- -------------------------------------------------------------------------------------------------------------------------------------------------
Planar LineString SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(4.536,-2.536,1.1,9.536,2.464,5.95))
Planar CircularString SDO_GEOMETRY(2002,28355,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(252321.904,5527048.051,252318.419,5527048.243,252323.295,5527047.937))
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2008 - Original coding in GEOM package.
Simon Greener - January 2013 - Port/Rewrite to T_GEOMETRY object function member.
Simon Greener - January 2014 - Port/Rewrite to T_SEGMENT object function member.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_PointAlong -- Computes the vertex that lies a given fraction along the line defined by this segment.
SYNOPSIS
Member Function ST_pointAlong(segmentLengthFraction in Number)
Return &&INSTALL_SCHEMA..T_Vertex deterministic
DESCRIPTION
A fraction of <code>0.0</code> returns the start point of the segment;
a fraction of <code>1.0</code> returns the end point of the segment.
If the fraction is null; 0.0 or null; 1.0 the point returned
will lie before the start or beyond the end of the segment.
INPUTS
p_segmentLengthFraction (number) -- The fraction of the segment length along the line
RESULT
Returns the vertex at that distance along the segment
EXAMPLE
select &&INSTALL_SCHEMA..T_Segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,1)))
.ST_PointAlong(p_segmentLengthFraction=>0.5)
.ST_SdoGeometry() as mPoint
from dual;
MPOINT
--------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(0.5, 0.5, NULL), NULL, NULL)
select &&INSTALL_SCHEMA..T_Segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,1)))
.ST_PointAlong(p_segmentLengthFraction=>0.9)
.ST_SdoGeometry() as mPoint
from dual;
MPOINT
--------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(0.9, 0.9, NULL), NULL, NULL)
select &&INSTALL_SCHEMA..T_Segment(mdsys.sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,2),sdo_ordinate_array(0,0,10,10,20,0)))
.ST_PointAlong(p_segmentLengthFraction=>0.5)
.ST_SdoGeometry() as mPoint
from dual;
MPOINT
------------------------------------------------------------------
SDO_GEOMETRY(2001, NULL, SDO_POINT_TYPE(10, 10, NULL), NULL, NULL)
NOTES
From JTS LineSegment.java
2D only; no circular arcs.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_PointAlongOffset -- Computes the vertex that lies a given fraction along the line defined by this segment and offset from the segment by a given distance.
SYNOPSIS
Member Function ST_pointAlongOffset(
p_segmentLengthFraction in Number,
p_offsetDistance in Number
)
Return &&INSTALL_SCHEMA..T_Vertex deterministic
DESCRIPTION
A fraction of 0.0 offsets from the start point of the segment;
a fraction of 1.0 offsets from the end point of the segment.
The computed point is offset to the left of the line if the offset distance is
positive, to the right if negative.
INPUTS
p_segmentLengthFraction (number) -- The fraction of the segment length along the line
p_offsetDistance (number) -- The distance the point is offset from the segment (positive is to the left, negative is to the right)
RESULT
Returns the vertex at that distance and offset along the segment
NOTES
From JTS LineSegment.java
2D only; no circular arcs.
Throws Exception if the segment has zero length
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_ProjectPoint -- Return a measured point by snapping provided point to the underlying LineString or circularString
SYNOPSIS
ST_ProjectPoint(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_unit in varchar2)
Return &&INSTALL_SCHEMA..T_Vertex deterministic
DESCRIPTION
This function snaps supplied point to underlying LineString or CircularString, returning the snapped point.
Computes Z and M values if exist on underlying LineString or CircularString.
If input circularString is 2D, length from start of LineString or CircularString to point is returned in M ordinate of snapped point.
NOTES
Supports geodetic/geographic data.
INPUTS
p_vertex (t_vertex) - Point near to linestring or CircularString.
RESULT
snapped point (t_vetex) -- First point found on LineString.
EXAMPLE
select 'Point is on centre of the XYZ circular arc (returns start point)' as test,
t_segment(SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.3246,-1, 0,7,-1, -3,6.3246,-1)))
.ST_ProjectPoint (
t_vertex(SDO_GEOMETRY('POINT(0 0)',NULL)),
null
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point does not have relationship with XYM LineString' as test,
t_segment(SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,0, 0,7,3.08, -3,6.325,6.15)))
.ST_ProjectPoint (
t_vertex(SDO_GEOMETRY('POINT(8 8)',NULL))
).ST_AsEWKT() as project_point
from dual union all
select 'Point projects on to point half way along XY circular arc (returns measure as length)' as test,
t_segment(SDO_GEOMETRY('CIRCULARSTRING (3 6.3246, 0 7, -3 6.3246)',NULL))
.ST_ProjectPoint (
t_vertex(SDO_GEOMETRY('POINT(0 3.5)',NULL)),
null
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point has relationship with XYM LineString' as test,
t_segment(SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,0, 0,7,3.08, -3,6.325,6.15)))
.ST_ProjectPoint (
t_vertex(SDO_GEOMETRY('POINT(2 8)',NULL))
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point has relationship with XYZM circular arc' as test,
t_segment(SDO_GEOMETRY(4402,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,-2.1,0, 0,7,-2.1,3.08, -3,6.325,-2.1,6.15)))
.ST_ProjectPoint (
t_vertex(SDO_GEOMETRY('POINT(2 8)',NULL)),
null
).ST_Round(3).ST_AsEWKT() as project_point
from dual union all
select 'Geodetic Point has relationship with XYZM Geodetic LineString' as test,
T_Segment(MDSYS.SDO_GEOMETRY(3302,4326,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(147.5,-43.132,100,147.41,-43.387,30000)))
.ST_ProjectPoint (
t_vertex(SDO_GEOMETRY(2001,8307,SDO_POINT_TYPE(147.509,-43.221,NULL),NULL,NULL))
).ST_Round(3).ST_AsEWKT() as project_point
from dual ;
TEST PROJECT_POINT
------------------------------------------------------------------------------------- ---------------------------------
Point is on centre of the XYZ circular arc (returns start point) POINTZ (3 6.325 -1)
Point does not have relationship with XYM CircularSring NULL
Point projects on to point half way along XY circular arc (returns measure as length) POINTM (0 7 3.1)
Point has relationship with XYM CircularSring POINTM (1.698 6.791 1.374)
Point has relationship with XYZM circular arc POINTZM (1.698 6.791 -2.1 1.374)
Geodetic Point has relationship with XYZM Geodetic LineString SRID=8307;POINTM (147.44551945 -43.23290209 11930.116)
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2008-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Reverse -- Reverses underlying segment's start and end coordinates.
SYNOPSIS
Member Function ST_Reverse
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Constructs new segment by swapping start and end coordinates of underlying segment.
If underlying segment has a middle coordinate it is left in place.
RESULT
segment (T_SEGMENT) -- segment that has reverse direction to the original segment.
EXAMPLE
select T_Segment(
sdo_geometry(2002,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,10,10))
).ST_Reverse()
.ST_SdoGeometry() as rSegment
from dual;
RSEGMENT
-------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(10,10,0,0))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Round -- Rounds X,Y,Z and m(w) ordinates of segment's coordinates usoing object's PrecisionModel.
SYNOPSIS
Member Function ST_Round
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Applies internal object's precisionModel decimal digits of precision value to ordinates of object.
If internal PrecisionModel is null, the object is returned unchanged.
If an internal PrecisionModel element is null the default values for the called ST_Round are applied.
RESULT
segment (T_SEGMENT) -- T_Segment with rounded ordinates using SELF.PrecisionModel values.
NOTES
Is wrapper over ST_Round( y, y, z, m );
EXAMPLE
with data as (
select sdo_geometry(4402,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349,1.3456,0.0005, 10.87365,11.983645,1.98434,14.38573)) as geom
From Dual
Union all
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349,1.3456,10.87365,11.983645,1.98434)) as geom
From Dual
Union all
select sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349, 10.87365,11.983645 )) as geom
from dual
)
select T_Segment(a.geom)
.ST_Round().ST_SdoGeometry() as rGeom
from data a;
RGEOM
-------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(4402,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.002,0.183,1.3,0,10.874,11.984,2,14.39))
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.002,0.183,1.3,10.874,11.984,2))
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.002,0.183,10.874,11.984))
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Round -- Rounds X,Y,Z and m(w) ordinates of segment's coordinates to passed in precision.
SYNOPSIS
Member Function ST_Round(p_dec_places_x in integer,
p_dec_places_y in integer default NULL,
p_dec_places_z in integer default 3,
p_dec_places_m in integer default 3)
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Applies relevant decimal digits of precision value to ordinate.
For example:
SELF.x := ROUND(SELF.x,p_dec_places_x);
ARGUMENTS
p_dec_places_x (integer) - value applied to x Ordinate.
p_dec_places_y (integer) - value applied to y Ordinate.
p_dec_places_z (integer) - value applied to z Ordinate.
p_dec_places_m (integer) - value applied to m Ordinate.
RESULT
segment (T_SEGMENT)
EXAMPLE
with data as (
select sdo_geometry(4402,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349,1.3456,0.0005, 10.87365,11.983645,1.98434,14.38573)) as geom
From Dual
Union all
select sdo_geometry(3002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349,1.3456,10.87365,11.983645,1.98434)) as geom
From Dual
Union all
select sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0.0023763,0.18349, 10.87365,11.983645 )) as geom
from dual
)
select T_Segment(a.geom)
.ST_Round(p_dec_places_x=>3,
p_dec_places_y=>3,
p_dec_places_z=>1,
p_dec_places_m=>2
).ST_SdoGeometry() as rGeom
from data a;
RGEOM
-------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(4402,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.002,0.183,1.3,0,10.874,11.984,2,14.39))
SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.002,0.183,1.3,10.874,11.984,2))
SDO_GEOMETRY(2002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.002,0.183,10.874,11.984))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_SdoGeometry -- Returns segment as a suitably encoded MDSYS.SDO_GEOMETRY object.
SYNOPSIS
Member Function ST_SdoGeometry(p_dims in integer default null)
Return MDSYS.sdo_geometry Deterministic,
DESCRIPTION
Geometry depends on how the segment is described (vertex-connected or circular arc).
Also, p_dims can force 3D linestring to be returned as a 2D linestring.
ARGUMENTS
p_dims in integer default null - A dimension value that will override SELF.ST_Dims() eg to return 2D from a 3D segment.
RESULT
linestring (MDSYS.SDO_GEOMETRY) -- Two (or three) point linestring.
EXAMPLE
select T_Segment(
p_segment_id => 0,
p_startCoord => t_Vertex(
p_id=>1,
p_x=>0.0023763,
p_y=>0.18349,
p_z=>1.346,
p_w=>0.001,
p_sdo_gtype=>4401,
p_sdo_srid=>NULL
),
p_EndCoord => T_Vertex(
p_id=>2,
p_x=>10.87365,
p_y=>11.983645,
p_z=>1.984,
p_w=>14.386,
p_sdo_gtype=>4401,
p_sdo_srid=>NULL
),
p_sdo_gtype=>4402,
p_sdo_srid=>NULL
).ST_SdoGeometry() as geom
from dual;
GEOM
-----------------------------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(4402,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0.0023763,0.18349,1.346,0.001,10.87365,11.983645,1.984,14.386))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_Self -- Handy method for use with TABLE(T_Segments) to return element as T_Segment object.
SYNOPSIS
Member Function ST_Self
Return T_Segment Deterministic,
DESCRIPTION
When segmentizing linear geometries into T_Segment objects via a TABLE function call to T_GEOMETRY.T_SEGMENTIZE()
it is handy to have a method which allows access to the result as a single object.
In a sense this method allows access similar to t.COLUMN_VALUE for atmoic datatype access from TABLE functions.
RESULT
segment (T_SEGMENT) -- A single T_Segment object.
EXAMPLE
set serveroutput on
BEGIN
FOR rec IN (select seg.segment_id, seg.ST_Self() as line
from table(t_geometry(
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(252282.861,5526962.496,252282.861,5526882.82, 252315.91,5526905.639, 252287.189,5526942.228)) )
.ST_Segmentize('ALL')) seg
)
LOOP
dbms_output.put_line(rec.line.ST_AsText());
END LOOP;
END;
/
anonymous block completed
SEGMENT(1,1,1,Start(1,252282.861,5526962.496,NULL,NULL,2001,28355),End(2,252282.861,5526882.82,NULL,NULL,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,1,2,Start(2,252282.861,5526882.82,NULL,NULL,2001,28355),End(3,252315.91,5526905.639,NULL,NULL,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
SEGMENT(1,1,3,Start(3,252315.91,5526905.639,NULL,NULL,2001,28355),End(4,252287.189,5526942.228,NULL,NULL,2001,28355),SDO_GTYPE=2002,SDO_SRID=28355)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_SetCoordinates -- Allows user to set a segment's start/mid/end coordinates
SYNOPSIS
Member Procedure ST_SetCoordinates(SELF IN OUT NOCOPY T_SEGMENT,
p_startCoord in &&INSTALL_SCHEMA..T_VERTEX,
p_midCoord in &&INSTALL_SCHEMA..T_VERTEX,
p_endCoord in &&INSTALL_SCHEMA..T_VERTEX),
DESCRIPTION
This procedure allows a user to set a segment's coordinates without creating a new segment.
If a NULL value is provided for the midCoord parameter its associated coordinate will be set to NULL.
If a NULL value is provided for the startCoord or endCoord it is ignored as it would otherwise invalidate the object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_SetCoordinates -- Allows user to set object's start or end coordinates.
SYNOPSIS
Member Procedure ST_SetCoordinates(SELF IN OUT NOCOPY T_SEGMENT,
p_startCoord in &&INSTALL_SCHEMA..T_VERTEX,
p_endCoord in &&INSTALL_SCHEMA..T_VERTEX),
DESCRIPTION
This procedure allows a user to set a segment's coordinates without creating a new segment.
If a NULL value is provided for a parameter it is ignored as it would otherwise invalidate the object.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_SetPrecisionModel -- Allows user to set object's t_precision object.
SYNOPSIS
Member Procedure ST_SetPrecisionModel(SELF IN OUT NOCOPY T_SEGMENT,
p_precision &&INSTALL_SCHEMA..T_PrecisionModel),
DESCRIPTION
This procedure allows a user to set the object's precision values in its t_precision object.
If a NULL value is provided for a precision object element, the existing value is maintained.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_SRID -- Returns the object's SDO_SRID attribute value.
SYNOPSIS
Member Function ST_SRID
Return INTEGER Deterministic,
DESCRIPTION
Returns sdo_srid object attribute.
RESULT
spatial reference id (INTEGER) -- eg 8311 etc.
EXAMPLE
with data as (
select T_Segment(
SDO_GEOMETRY('CIRCULARSTRING(252230.478 5526918.373, 252400.08 5526918.373, 252230.478 5527000.0)',28355)
) as circular_segment
from dual
)
select a.circular_segment.ST_Srid() as Srid
from data a;
SRID
-----
28355
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_To2D -- Constructs a 2D segment from the underlying segment which can have any dimension.
SYNOPSIS
Member Function ST_To2D
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Constructs new segment by discarding any z and w ordinates.
SDO_GTYPE returned will be 2001.
If segment already 2D it is returned unchanged.
RESULT
segment (T_SEGMENT) -- 2d segment.
EXAMPLE
select T_Segment(sdo_geometry(3002,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5, -42.5,10.0, 147.6, -42.5, 10.0)))
.ST_To2D()
.ST_SdoGeometry(2) as geom2D
from dual;
GEOM2D
---------------------------------------------------------------------------------------------------
SDO_GEOMETRY(2002,4283,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.5,-42.5,147.6,-42.5))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_To3D -- Constructs a 3D segment from the underlying segment which can have any dimension.
SYNOPSIS
Member Function ST_To3D(p_keep_measure in integer default 0,
p_default_z in number default null)
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Constructs new 3D segment.
If segment 2D is has any p_default_z values added to the new segment's z ordinates.
If segment is 3D with no measure it is returned without change.
If segment is 3D with Measure it is returned as an unmeasured 3D segment with the Z ordinates
being the original measure values if p_keep_measure = 1, otherwise, the Z values are set to p_default_z.
If segment is 4D with Measure it is returned as an unmeasured 3D segment with the Z ordinates
being the original measure values if p_keep_measure = 1, otherwise, the Z values are set to p_default_z.
RESULT
segment (T_SEGMENT) -- 3D segment.
EXAMPLE
-- Convert 2D segment to 3D with constant Z value of 10.0
select T_Segment(sdo_geometry(2002,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5, -42.5, 147.6,-42.5)))
.ST_To3D(p_keep_measure => 0,
p_default_z => 10.0)
.ST_SdoGeometry(3) as geom3D
from dual;
GEOM3D
---------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,4283,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(147.5,-42.5,10,147.6,-42.5,10))
-- Convert measured segment (no Z) to 3D with Z
select T_Segment(sdo_geometry(3302,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5, -42.5,0.0, 147.6, -42.5, 10923.0)))
.ST_To3D(p_keep_measure => 1)
.ST_SdoGeometry(3) as geom3D
from dual;
GEOM3D
-----------------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,4283,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1),MDSYS.SDO_ORDINATE_ARRAY(147.5,-42.5,0,147.6,-42.5,10923))
-- Convert measured segment with Z to 3D with Z (throw M away)
select T_Segment(sdo_geometry(4402,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5,-42.5,849.9,2000.0, 147.6,-42.5,1923.0,4000.0)))
.ST_To3D(p_keep_measure => 0)
.ST_SdoGeometry(3) as geom3D
from dual;
GEOM3D
--------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,4283,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.5,-42.5,849.9,147.6,-42.5,1923))
-- Convert measured segment with Z to 3D with M becoming Z (throw Z away)
select T_Segment(sdo_geometry(4402,4283,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(147.5,-42.5,849.9,2000.0, 147.6,-42.5,1923.0,4000.0)))
.ST_To3D(p_keep_measure => 1)
.ST_SdoGeometry(3) as geom3D
from dual;
GEOM3D
-------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(3002,4283,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(147.5,-42.5,2000,147.6,-42.5,4000))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_UpdateCoordinate -- Function which updates the start, mid or end coordinate depending on p_which.
SYNOPSIS
Member Function ST_UpdateCoordinate(p_coordinate in &&INSTALL_SCHEMA..T_Vertex,
p_which in varchar2 default 'S' )
Return &&INSTALL_SCHEMA..T_SEGMENT Deterministic,
DESCRIPTION
Function that updates start, mid or end coordinate the underlying T_Segment which value in p_coordinate depending on position identified by p_which.
p_which can have one of 6 values. See Arguments.
ARGUMENTS
p_coordinate (T_Vertex) -- Replacement coordinate which must not be null otherwise T_Segment is unchanged.
p_which (varchar2) -- Can be one of the following values:
- NULL : defaults to 'S'
- 'S' or '1' : StartCoord
- 'M' or '2' : midCoord
- 'E' or '3' : endCoord
RESULT
updated segment (T_Segment) - Geometry with coordinate replaced.
EXAMPLE
select T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_UpdateCoordinate(
p_coordinate => T_Vertex(
p_x => 99.0,
p_y => 100.0,
p_id => 1,
p_sdo_gtype => 2001,
p_sdo_srid => NULL),
p_which => 1
)
.startCoord
.ST_AsText() as updatedSegment
from dual;
UPDATEDSEGMENT
--------------------------------------
T_Vertex(99,100,NULL,NULL,1,2001,NULL)
-- Create midCoord where doesn't exist.
select T_Segment(
p_Segment_id => 0,
p_startCoord => T_Vertex(
p_id => 1,
p_x => 10,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_endCoord => T_Vertex(
p_id => 3,
p_x => 20,
p_y => 0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
),
p_sdo_gtype => 2002,
p_sdo_srid => NULL
)
.ST_UpdateCoordinate(
p_coordinate => T_Vertex(
p_x => 99.0,
p_y => 100.0,
p_id => 2,
p_sdo_gtype => 2001,
p_sdo_srid => NULL),
p_which => '2'
)
.ST_AsText() as updatedSegment
from dual;
UPDATEDSEGMENT
------------------------------------------
SEGMENT(NULL,NULL,0,
Start(10,0,NULL,NULL,1,2001,NULL),
Mid(99,100,NULL,NULL,2,2001,NULL),
End(20,0,NULL,NULL,3,2001,NULL),
SDO_GTYPE=2002,SDO_SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - December 2006 - Original Coding for GEOM package.
Simon Greener - July 2011 - Port to T_GEOMETRY.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_PointToCircularArc -- Return a measured point by snapping provided point to the provided circularstring
SYNOPSIS
ST_PointToCircularArc(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_unit in varchar2 default null)
Return &&INSTALL_SCHEMA..T_Vertex deterministic
DESCRIPTION
This function snaps supplied point to underlying circularString, returning the snapped point.
Computes Z and M values if exist on underlying CircularString.
If input circularString is 2D, length from start of circularString to point is returned in M ordinate of snapped point.
NOTES
Supports CircularString geometries only.
INPUTS
p_vertex (t_vertex) - Point near to linestring.
p_unit (varchar2) - Unit of measure (depends on SRID)
RESULT
snapped point (t_vetex) -- First point found on circularString.
EXAMPLE
select 'Point is on centre of the XYZ circular arc (returns start point)' as test,
t_segment(SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.3246,-1, 0,7,-1, -3,6.3246,-1)))
.ST_PointToCircularArc (
t_vertex(SDO_GEOMETRY('POINT(0 0)',NULL)),
null
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point does not have relationship with XYM CircularSring' as test,
t_segment(SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,0, 0,7,3.08, -3,6.325,6.15)))
.ST_PointToCircularArc (
t_vertex(SDO_GEOMETRY('POINT(8 8)',NULL))
).ST_AsEWKT() as project_point
from dual union all
select 'Point projects on to point half way along XY circular arc (returns measure as length)' as test,
t_segment(SDO_GEOMETRY('CIRCULARSTRING (3 6.3246, 0 7, -3 6.3246)',NULL))
.ST_PointToCircularArc (
t_vertex(SDO_GEOMETRY('POINT(0 3.5)',NULL)),
null
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point has relationship with XYM CircularSring' as test,
t_segment(SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,0, 0,7,3.08, -3,6.325,6.15)))
.ST_PointToCircularArc (
t_vertex(SDO_GEOMETRY('POINT(2 8)',NULL))
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point has relationship with XYZM circular arc' as test,
t_segment(SDO_GEOMETRY(4402,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,-2.1,0, 0,7,-2.1,3.08, -3,6.325,-2.1,6.15)))
.ST_PointToCircularArc (
t_vertex(SDO_GEOMETRY('POINT(2 8)',NULL)),
null
).ST_Round(3).ST_AsEWKT() as project_point
from dual ;
TEST PROJECT_POINT
------------------------------------------------------------------------------------- -----------------------------
Point is on centre of the XYZ circular arc (returns start point) POINTZ (3 6.325 -1)
Point does not have relationship with XYM CircularSring NULL
Point projects on to point half way along XY circular arc (returns measure as length) POINTM (0 7 3.1)
Point has relationship with XYM CircularSring POINTM (1.698 6.791 1.374)
Point has relationship with XYZM circular arc POINTZM (1.698 6.791 -2.1 1.374)
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2008-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_SEGMENT ] [ Methods ]
NAME
ST_PointToLineString -- Return a measured point by snapping provided point to the underlying LineString
SYNOPSIS
ST_PointToLineString(p_vertex in &&INSTALL_SCHEMA..T_Vertex)
Return &&INSTALL_SCHEMA..T_Vertex deterministic
DESCRIPTION
This function snaps supplied point to underlying LineString, returning the snapped point.
Computes Z and M values if exist on underlying LineString.
If input circularString is 2D, length from start of LineString to point is returned in M ordinate of snapped point.
NOTES
Supports LineString geometries only.
INPUTS
p_vertex (t_vertex) - Point near to linestring.
RESULT
snapped point (t_vetex) -- First point found on LineString.
EXAMPLE
select 'Point is on centre of the XYZ circular arc (returns start point)' as test,
t_segment(SDO_GEOMETRY(3002,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.3246,-1, 0,7,-1, -3,6.3246,-1)))
.ST_PointToLineString (
t_vertex(SDO_GEOMETRY('POINT(0 0)',NULL)),
null
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point does not have relationship with XYM LineString' as test,
t_segment(SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,0, 0,7,3.08, -3,6.325,6.15)))
.ST_PointToLineString (
t_vertex(SDO_GEOMETRY('POINT(8 8)',NULL))
).ST_AsEWKT() as project_point
from dual union all
select 'Point projects on to point half way along XY circular arc (returns measure as length)' as test,
t_segment(SDO_GEOMETRY('CIRCULARSTRING (3 6.3246, 0 7, -3 6.3246)',NULL))
.ST_PointToLineString (
t_vertex(SDO_GEOMETRY('POINT(0 3.5)',NULL)),
null
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point has relationship with XYM LineString' as test,
t_segment(SDO_GEOMETRY(3302,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,0, 0,7,3.08, -3,6.325,6.15)))
.ST_PointToLineString (
t_vertex(SDO_GEOMETRY('POINT(2 8)',NULL))
).ST_Round(3,3,3,3).ST_AsEWKT() as project_point
from dual union all
select 'Point has relationship with XYZM circular arc' as test,
t_segment(SDO_GEOMETRY(4402,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(3,6.325,-2.1,0, 0,7,-2.1,3.08, -3,6.325,-2.1,6.15)))
.ST_PointToLineString (
t_vertex(SDO_GEOMETRY('POINT(2 8)',NULL)),
null
).ST_Round(3).ST_AsEWKT() as project_point
from dual ;
TEST PROJECT_POINT
------------------------------------------------------------------------------------- -----------------------------
Point is on centre of the XYZ circular arc (returns start point) POINTZ (3 6.325 -1)
Point does not have relationship with XYM CircularSring NULL
Point projects on to point half way along XY circular arc (returns measure as length) POINTM (0 7 3.1)
Point has relationship with XYM CircularSring POINTM (1.698 6.791 1.374)
Point has relationship with XYZM circular arc POINTZM (1.698 6.791 -2.1 1.374)
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2008-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Types ]
NAME
T_TOKEN -- Object type representing a single cell in a matrix of non-overlapping (no gaps) cells.
DESCRIPTION
An object type that represents a single cell within an array of
optimized rectanges representing a grid or matrix of "raster" style objects.
Used mainly with T_TOKENs in PIPELINED T_GEOMETRY methods.
NOTES
No methods are declared on this type.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2005 - Original coding.
Simon Greener - Jan 2013 - Port from GEOM Package.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_TOKEN ] [ Variables ]
ATTRIBUTES
id -- unique identifier associated with token: starts from 1 for first token extracted through to max for last.
token -- The actual token.
separator -- The trailing separator that was immediately after the token in the string.
SOURCE
id integer, token varchar2(30000), separator varchar2(30000)
[ Top ] [ Types ]
NAME
T_VECTOR3D -- Object type representing a mathematical segment
DESCRIPTION
An object type that represents a single mathematical segment.
Includes methods on segments.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2015 - Original coding.
COPYRIGHT
(c) 2012-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
AddV -- Constructs segment as segment sum of SELF and v1 parameter.
SYNOPSIS
Member Function AddV(v1 in &&INSTALL_SCHEMA..T_VECTOR3D)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Angle -- Returns the angle in radians between this segment and the segment parameter; the return value is constrained to the range [0-PI].
SYNOPSIS
Member Function Angle(v1 in &&INSTALL_SCHEMA..T_VECTOR3D)
Return Number Deterministic,
PARAMETERS
v1 (T_Vector3D) - Second segment
RETURNS
The angle in radians in the range [0-PI]
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
AsSdoGeometry -- Creates an SDO_GEOMETRY equivalent of T_VECTOR3D.
SYNOPSIS
Member Function AsSdoGeometry(p_srid in integer default null)
Return mdsys.sdo_geometry Deterministic
PARAMETERS
p_srid (integer) - Value for sdo_geometry.sdo_srid.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
AsText -- Creates an textual representation of a T_VECTOR3D object.
SYNOPSIS
Member Function AsText(p_round IN integer DEFAULT 9)
Return Varchar2 Deterministic,
PARAMETERS
p_round (integer) -- Value for use in ROUND to compare XYZ values.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Variables ]
ATTRIBUTES
x -- X Ordinate y -- Y Ordinate z -- Z Ordinate
SOURCE
x number, y number, z number,
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
A collection of T_VECTOR3D Constructors.
SOURCE
Constructor Function T_VECTOR3D( SELF IN OUT NOCOPY T_VECTOR3D, p_SEGMENT IN &&INSTALL_SCHEMA..T_SEGMENT) Return Self As Result, Constructor Function T_VECTOR3D( SELF IN OUT NOCOPY T_VECTOR3D, p_SEGMENT IN &&INSTALL_SCHEMA..T_VECTOR3D) Return Self As Result, Constructor Function T_VECTOR3D( SELF IN OUT NOCOPY T_VECTOR3D, p_vertex IN &&INSTALL_SCHEMA..T_Vertex) Return Self As Result, Constructor Function T_VECTOR3D( SELF IN OUT NOCOPY T_VECTOR3D, p_start_vertex IN &&INSTALL_SCHEMA..T_Vertex, p_end_vertex IN &&INSTALL_SCHEMA..T_Vertex) Return Self As Result,
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Cross -- Creates a new segment that is the segment cross product of segments SELF and v1.
SYNOPSIS
Member Function Cross(v1 in &&INSTALL_SCHEMA..T_VECTOR3D)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
v1 (T_Vector3D) - Second segment
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Distance -- Returns the distance between this T_VECTOR3D the specified point.
SYNOPSIS
Member Function Distance(p_point in &&INSTALL_SCHEMA..T_VECTOR3D)
Return Number Deterministic,
PARAMETERS
p_point (T_Vector3D) - The point.
RETURNS
The distance between the segment and p_point.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Distance -- Returns the distance between this T_VECTOR3D the specified point.
SYNOPSIS
Member Function Distance(p_point in &&INSTALL_SCHEMA..T_Vertex )
Return Number Deterministic,
PARAMETERS
v1 (T_Vector3D) - Second segment
RETURNS
The distance between the segment and p_point.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
DistanceSquared -- Returns the square of the distance between the specified points.
SYNOPSIS
Member Function DistanceSquared(p_point in &&INSTALL_SCHEMA..T_VECTOR3D)
Return Number Deterministic,
PARAMETERS
p_point (T_Vector3D) - Point.
RETURNS
The square of the distance between the segment and point1.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
DistanceSquared -- Returns the square of the distance between the specified points.
SYNOPSIS
Member Function DistanceSquared(p_point in &&INSTALL_SCHEMA..T_Vertex)
Return Number Deterministic,
PARAMETERS
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Divide -- Returns the components of the current segment divided by the specified scalar.
SYNOPSIS
Member Function Divide(p_scalar in Number)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
p_scalar (number) - The scalar value.
RETURNS
The components of value1 divided by the p_scalar.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Dot -- Returns the dot product of the current segment and the provided parameter.
SYNOPSIS
Member Function Dot(v1 in &&INSTALL_SCHEMA..T_VECTOR3D)
Return Number Deterministic,
PARAMETERS
v1 (T_Vector3D) - Another segment
RETURNS
The dot product of this and v1
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Equals -- Compares two vectors for equality (in magnitude and direction)
SYNOPSIS
Member Function Equals(p_vector3D IN T_Vector3D)
Return Integer Deterministic,
PARAMETERS
p_vector3D (t_vector3D) - Second vector for comparison with SELF (underlying)
RETURNS
True(1)/False(0) -- 1 if True, 0 if False.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Magnitude -- Returns the Magnitude of this segment.
SYNOPSIS
Member Function Magnitude
Return Number Deterministic,
RETURNS
The Magnitude of this segment
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
MagnitudeSquared -- Returns the squared Magnitude of this segment.
SYNOPSIS
Member Function MagnitudeSquared
Return Number Deterministic,
RETURNS
The squared Magnitude of this segment
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Multiply -- Returns the components of the specified segment multiplied by the specified scalar.
SYNOPSIS
Member Function Multiply(p_scalar in Number)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
p_scalar (number) - The scalar value.
RETURNS
The components of the value1 multiplied by the p_scalar
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Negate -- Computes a segment with the same magnitude as SELF but pointing to the opposite direction.
SYNOPSIS
Member Function Negate
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
RETURNS
A segment with the same magnitude as SELF but pointing to the opposite
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Normalize -- Normalizes the current segment returning a new one.
SYNOPSIS
Member Function Normalize
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Normalize -- Creates a new segment that is the value of this segment to the normalization of segment v1.
SYNOPSIS
Member Function Normalize(v1 in &&INSTALL_SCHEMA..T_VECTOR3D )
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
v1 (T_Vector3D) - param v1 the un-normalized segment
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
ProjectOnLine -- Computes the current segment projected on p_line.
SYNOPSIS
Member Function ProjectOnLine(p_line in &&INSTALL_SCHEMA..T_SEGMENT)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
p_line (T_Segment) - Second segment
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
ProjectOnLine -- Computes the current segment projected on the specified line.
SYNOPSIS
Member Function ProjectOnLine(pointOnLine1 in &&INSTALL_SCHEMA..T_VECTOR3D,
pointOnLine2 in &&INSTALL_SCHEMA..T_VECTOR3D)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
Second segment
pointOnLine1 (T_Vector3D) - A point on the line.
pointOnLine2 (T_Vector3D) - A point on the line.
RETURNS
Value projected on the line defined by pointOnLine1 pointOnLine2.
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Subtract -- Sets the value of this segment to the segment difference of itself and segment (this = this - segment).
SYNOPSIS
Member Function Subtract(v1 in &&INSTALL_SCHEMA..T_VECTOR3D)
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
PARAMETERS
v1 (T_Vector3D) - Second segment
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VECTOR3D ] [ Methods ]
NAME
Zero -- Sets all the values in this segment to zero.
SYNOPSIS
Member Function zero
Return &&INSTALL_SCHEMA..T_VECTOR3D Deterministic,
AUTHOR
Simon Greener
HISTORY
Simon Greener - January 2011 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Types ]
NAME
T_VERTEX -- Represents a single coordinate object with variable ordinate dimensions.
DESCRIPTION
An object type that represents a single vertex/coordinate of a geometry object.
Includes Methods on that type.
NOTE
T_Vertex is provided for two reasons:
1. The mdsys constructor for MDSYS.VERTEX_TYPE has changed with each version, making code stability an issue.
2. This object allows for the provision of specific methods on a single vertex.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Variables ]
ATTRIBUTES
X -- X Ordinate
Y -- Y Ordinate
Z -- Z Ordinate
W -- W Ordinate (Normally Measure)
ID -- Identifier
sdo_gtype -- Geometry Type of Vertex
sdo_srid -- Spatial Reference ID of Vertex
deleted -- Flag for use in collections like varrays or T_Vertices
SOURCE
x number, y number, z number, w number, id integer, sdo_gtype integer, sdo_srid integer, deleted integer,
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
A collection of T_VERTEX Constructors.
SOURCE
Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_vertex In &&INSTALL_SCHEMA..T_vertex ) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_point in mdsys.sdo_geometry ) Return Self As Result, /* EXAMPLE * SELECT t.id, * TRIM(BOTH ' ' FROM t.token) as token, * T_VERTEX(p_coord_string => TRIM(BOTH ' ' FROM t.token), * p_id => t.id, * p_sdo_srid => null) * .ST_AsText() as vertex * FROM table(tools.tokenizer('1.1 -2.1 3.47, 10 0 2,10 5 3,10 10 4,5 10 5,5 5 6',',')) t * ORDER BY t.id; * * ID TOKEN VERTEX * -- ------------- ---------------------------------------------------------- * 1 1.1 -2.1 3.47 T_Vertex(X=1.1,Y=-2.1,Z=3.47,W=0.0,ID=1,GT=3001,SRID=NULL) * 2 10 0 2 T_Vertex(X=10.0,Y=0.0,Z=2.0,W=0.0,ID=2,GT=3001,SRID=NULL) * 3 10 5 3 T_Vertex(X=10.0,Y=5.0,Z=3.0,W=0.0,ID=3,GT=3001,SRID=NULL) * 4 10 10 4 T_Vertex(X=10.0,Y=10.0,Z=4.0,W=0.0,ID=4,GT=3001,SRID=NULL) * 5 5 10 5 T_Vertex(X=5.0,Y=10.0,Z=5.0,W=0.0,ID=5,GT=3001,SRID=NULL) * 6 5 5 6 T_Vertex(X=5.0,Y=5.0,Z=6.0,W=0.0,ID=6,GT=3001,SRID=NULL) * * 6 rows selected * * SELECT t.id, * TRIM(BOTH ' ' FROM t.token) as token, * T_VERTEX(TRIM(BOTH ' ' FROM t.token), * t.id, * null) * .ST_AsText() as vertex * FROM table(tools.tokenizer( * '1.1 -2.1 3.47 1.0,10 0 2 2.1,10 5 3 3,10 10 4 4.1,5 10 5 5.1,5 5 6 6.1',',')) t * ORDER BY t.id; * * ID TOKEN VERTEX * ---------- ----------------- ------------------------------------------------------------ * 1 1.1 -2.1 3.47 1.0 T_Vertex(X=1.1,Y=-2.1,Z=3.47,W=1.0,ID=1,GT=4401,SRID=NULL) * 2 10 0 2 2.1 T_Vertex(X=10.0,Y=0.0,Z=2.0,W=2.1,ID=2,GT=4401,SRID=NULL) * 3 10 5 3 3 T_Vertex(X=10.0,Y=5.0,Z=3.0,W=3.0,ID=3,GT=4401,SRID=NULL) * 4 10 10 4 4.1 T_Vertex(X=10.0,Y=10.0,Z=4.0,W=4.1,ID=4,GT=4401,SRID=NULL) * 5 5 10 5 5.1 T_Vertex(X=5.0,Y=10.0,Z=5.0,W=5.1,ID=5,GT=4401,SRID=NULL) * 6 5 5 6 6.1 T_Vertex(X=5.0,Y=5.0,Z=6.0,W=6.1,ID=6,GT=4401,SRID=NULL) * * 6 rows selected */ Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_coord_string in varchar2, p_id in integer default 1, p_sdo_srid in integer default null) Return Self as result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_id in integer, p_sdo_gtype in integer default 2001, p_sdo_srid in integer default NULL) Return Self as result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_x In number, p_y In number) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_x In number, p_y In number, p_id In integer, p_sdo_gtype in integer, p_sdo_srid in integer) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_x In number, p_y In number, p_z In number, p_id In integer, p_sdo_gtype in integer, p_sdo_srid in integer) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_x In number, p_y In number, p_z In number, p_w In number, p_id In integer, p_sdo_gtype in integer, p_sdo_srid in integer) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_vertex In mdsys.vertex_type, p_sdo_gtype in integer default 2001, p_sdo_srid in integer default null) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_vertex In mdsys.vertex_type, p_id In integer, p_sdo_gtype in integer default 2001, p_sdo_srid in integer default null) Return Self As Result, Constructor Function T_Vertex( SELF IN OUT NOCOPY T_Vertex, p_point in mdsys.sdo_point_type, p_sdo_gtype in integer default 2001, p_sdo_srid in integer default null) Return Self as result,
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
A collection of T_VERTEX variable inspectors.
DESCRIPTION
ST_X, ST_Y, ST_Z, ST_W return the relevant (z,y,z,w) underlying ordinate property values.
ST_ID returns the value given to the ID property.
ST_SRID returns the value given to the sdo_srid property.
ST_Sdo_Gtype returns the value given to the sdo_gtype property (see also ST_Dims()).
SOURCE
Member Function ST_X Return Number Deterministic, Member Function ST_Y Return Number Deterministic, Member Function ST_Z Return Number Deterministic, Member Function ST_W Return Number Deterministic, Member Function ST_M Return Number Deterministic, Member Function ST_ID Return integer Deterministic, Member Function ST_SRID Return integer Deterministic, Member Function ST_SDO_GTYPE Return integer Deterministic, Member Function ST_IsDeleted Return integer Deterministic, Member Function ST_IsMeasured Return integer Deterministic,
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
OrderBy -- Implements ordering function that can be used to sort a collection of T_Vertex objects.
SYNOPSIS
Order Member Function OrderBy(p_vertex in &&INSTALL_SCHEMA..T_Vertex)
Return Number deterministic
DESCRIPTION
This order by function allows a collection of T_Vertex objects to be sorted.
For example in the ORDER BY clause of a SELECT statement. Comparison uses all ordinates: X, Y, Z and W.
PARAMETERS
p_vertex (T_VERTEX) - Order pair
RESULT
order value (NUMBER) - -1 less than; 0 equal; 1 greater than
EXAMPLE
With vertices as (
select t_vertex(p_x=>dbms_random.value(0,level),
p_y=>dbms_random.value(0,level),
p_id=>1,
p_sdo_gtype=>2001,
p_sdo_srid=>null) as vertex
from dual
connect by level < 10
)
select a.vertex.st_astext(2) as vertex
from vertices a
order by a.vertex;
VERTEX
-------------------------------------------------------------
T_Vertex(X=.29,Y=1.61,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=.32,Y=1.39,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=.64,Y=.06,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=1.76,Y=2.76,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=2.06,Y=5.36,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=2.56,Y=8.99,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=3.08,Y=.63,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=4.17,Y=.57,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
T_Vertex(X=6.55,Y=1.18,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
9 rows selected
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_AsCoordString -- Returns text Description of Vertex
SYNOPSIS
Member Function ST_AsCoordString(p_separator in varchar2 Default ' ',
p_format_model in varchar2 default 'TM9')
Return Varchar2 Deterministic,
DESCRIPTION
Returns textual description of the vertex's ordinates only.
Useful for working with WKT.
If rounding of ordinates is required first use ST_Round.
PARAMETERS
p_separator (varchar2) -- Separator between ordinates.
p_format_model (varchar2) -- Oracle Number Format Model (see documentation)
default 'TM9')
RESULT
Coordinate String (varchar2)
EXAMPLE
select T_Vertex(
sdo_geometry('POINT(0 0)',NULL)
)
.ST_AsText() as pVertex,
T_Vertex(
sdo_geometry('POINT(147.5 -42.5)',4283)
)
.ST_AsText() as gVertex
from dual;
PVERTEX GVERTEX
--------------------------------------------------------- -----------------------------------------------------------------
T_Vertex(X=0,Y=0,Z=NULL,W=NULL,ID=NULL,GT=2001,SRID=NULL) T_Vertex(X=147.5,Y=-42.5,Z=NULL,W=NULL,ID=NULL,GT=2001,SRID=4283)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_AsText -- Returns text Description of Vertex
SYNOPSIS
Member Function ST_AsText(p_format_model in varchar2 default 'TM9')
Return Varchar2 Deterministic,
DESCRIPTION
Returns textual description of vertex.
If rounding of ordinates is required, first use ST_Round.
PARAMETERS
p_format_model (varchar2) -- Oracle Number Format Model (see documentation)
default 'TM9') -- was 'TM9'
RESULT
Vertex Representation (varchar2)
EXAMPLE
select T_Vertex(
sdo_geometry('POINT(0 0)',NULL)
)
.ST_AsText() as pVertex,
T_Vertex(
sdo_geometry('POINT(147.5 -42.5)',4283)
)
.ST_AsText() as gVertex
from dual;
PVERTEX GVERTEX
--------------------------------------------------------- -----------------------------------------------------------------
T_Vertex(X=0,Y=0,Z=NULL,W=NULL,ID=NULL,GT=2001,SRID=NULL) T_Vertex(X=147.5,Y=-42.5,Z=NULL,W=NULL,ID=NULL,GT=2001,SRID=4283)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Bearing -- Returns bearing from SELF to supplied T_Vertex.
SYNOPSIS
Member Function ST_Bearing(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_projected in integer default 1,
p_normalize in integer default 1 )
Return Number Deterministic
DESCRIPTION
This function computes a bearing from the current object point (SELF) to the supplied T_Vertex.
Result is in degrees.
Use static function TOOLS.ST_Degrees to return as a whole circle bearing.
Geodetic calculations are used if p_projected = 0, otherwise planar calculations are used.
If p_normlize is true (1), the resulting bearing is normalised to a value between 0.360.
PARAMETERS
p_vertex (T_VERTEX) -- A Vertex to which a bearing is calculated.
p_projected (integer) -- Usually called from T_GEOMETRY with SELF.projected.
If either 1 for Projected/Planar and 0 for Geographic/Geodetic.
If NULL, TOOLS.ST_GetSridType is called.
p_normalize (integer) -- If 1 computed bearing is normalized to a value between 0..360 degrees.
RESULT
Bearing (Number) -- Bearing in Degrees.
EXAMPLE
-- Simple bearing for projected data
select round(
T_Vertex(
sdo_geometry('POINT(0 0)',NULL)
)
.ST_Bearing(
T_Vertex(
sdo_geometry('POINT(10 10)',NULL)
),
p_projected=>1,
p_normalize=>1
),8) as bearing
from dual;
BEARING
-------
45
-- Simple geodetic bearing (2D)
select COGO.DD2DMS(
T_Vertex(
sdo_geometry('POINT(147.5 -42.5)',4283)
)
.ST_Bearing(
T_Vertex(
sdo_geometry('POINT(147.6 -42.5)',4283)
),
p_projected=>0,
p_normalize=>1
)
) as bearing
from dual;
BEARING
-------------
90°02'01.606"
SEE ALSO
ST_Degrees.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Dims -- Returns number of ordinate dimensions
SYNOPSIS
Member Function ST_Dims
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (2XXX etc) and extracts coordinate dimensions.
If SDO_GTYPE is null, examines ordinates eg XY not null, Z null -> 2.
RESULT
BOOLEAN (INTEGER) -- 2 if data 2D; 3 if 3D; 4 if 4D
EXAMPLE
select t_vertex().ST_Dims() as eDims,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_z => 0.0,
p_sdo_gtype => 3001,
p_sdo_srid => NULL
)
.ST_Dims() as dims
from dual;
EDIMS DIMS
----- ----
2 3
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Distance -- Returns distance from current vertex (SELF) to supplied T_Vertex.
SYNOPSIS
Member Function ST_Distance(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_tolerance in number default 0.05,
p_unit in varchar2 default NULL)
Return Number Deterministic
DESCRIPTION
This function computes a distance from the current object point (SELF) to the supplied T_Vertex.
Result is in the distance units of the SDO_SRID, or in p_units where supplied.
PARAMETERS
p_vertex (T_VERTEX) - A Vertex to which a bearing is calculated.
p_tolerance (NUMBER) - sdo_tolerance for use with sdo_geom.sdo_distance.
p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.
RESULT
distance (Number) -- Distance in SRID unit of measure or in supplied units (p_unit)
EXAMPLE
-- Planar in Meters
select Round(
T_Vertex(
sdo_geometry('POINT(0 0)',NULL)
)
.ST_Distance(
p_vertex => T_Vertex(
sdo_geometry('POINT(10 10)',NULL)
),
p_tolerance=> 0.05
),
3
) as distance
from dual;
DISTANCE
----------
14.142
-- Geodetic In Kilometers
select Round(
T_Vertex(
sdo_geometry('POINT(147.5 -42.5)',4283)
)
.ST_Distance(
p_Vertex => T_Vertex(
sdo_geometry('POINT(147.6 -42.5)',4283)
),
p_tolerance=> 0.05,
p_unit => 'unit=KM'
),
4
) as distance
from dual;
DISTANCE
----------
8.2199
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Equals -- Compares current object (SELF) with supplied vertex.
SYNOPSIS
Member Function ST_Equals(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_dPrecision in number default 3)
Return Integer deterministic
DESCRIPTION
This function compares current object vertex (SELF) to supplied vertex (p_vertex).
If all ordinates (to supplied precision) are equal, returns True (1) else False (0).
SDO_GTYPE, SDO_SRID and ID are not compared.
PARAMETERS
p_vertex (T_VERTEX) - Vertex that is to be compared to current object (SELF).
p_dPrecision (INTEGER) - Decimal digits of precision for all ordinates.
RESULT
BOOLEAN (INTEGER) - 1 is True (Equal); 0 is False.
EXAMPLE
select t.IntValue as precision,
T_Vertex(
p_x => 12847447.54578,
p_y => 4374842.3425,
p_z => 3.2746,
p_id => 1,
p_sdo_gtype=> 3001,
p_sdo_srid => NULL
)
.ST_Equals(
T_Vertex(
p_x => 12847447.546,
p_y => 4374842.34,
p_z => 3.2746,
p_id => 1,
p_sdo_gtype=> 3001,
p_sdo_srid => NULL
),
t.IntValue
) as vEquals
from table(TOOLS.generate_series(1,3,1)) t;
PRECISION VEQUALS
--------- -------
1 1
2 1
3 0
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_FromBearingAndDistance -- Returns new T_Vertex given bearing and distance.
SYNOPSIS
Member Function ST_FromBearingAndDistance(p_bearing in number,
p_distance in number,
p_projected in integer default 1)
Return T_Vertex Deterministic
DESCRIPTION
This function computes a new T_VERTEX computed from current object point (SELF)
the supplied bearing and distance.
Geodetic calculations are used if p_projected = 0, otherwise planar calculations are used.
PARAMETERS
p_bearing (NUMBER) -- A whole circle bearing in radians.
p_distance (NUMBER) -- Distance expressed in Oracle Unit of Measure eg METER.
p_projected (integer) -- Usually called from T_GEOMETRY with SELF.projected.
If either 1 for Projected/Planar and 0 for Geographic/Geodetic.
If NULL, TOOLS.ST_GetSridType is called.
RESULT
vertexx (T_VERTEX) -- New vertex computed using bearing and distance from current object.
EXAMPLE
-- Planar in Meters
select T_Vertex(
sdo_geometry('POINT(0 0)',NULL)
)
.ST_FromBearingAndDistance(
p_bearing => 45.0,
p_distance => 14.142,
p_projected => 1
)
.ST_Round(3)
.ST_AsText() as vertex
from dual;
VERTEX
--------------------------------------------------------
T_Vertex(X=10,Y=10,Z=NULL,W=NULL,ID=1,GT=2001,SRID=NULL)
-- Geodetic with distance in meters
select T_Vertex(
sdo_geometry('POINT(147.5 -42.5)',4283)
)
.ST_FromBearingAndDistance (
p_bearing => COGO.DMS2DD('90°02''01.606"'),
p_distance => 8219.9,
p_projected => 0
)
.ST_Round(6)
.ST_AsText() as vertex
from dual;
VERTEX
-----------------------------------------------------------------
T_Vertex(X=147.6,Y=-42.5,Z=NULL,W=NULL,ID=NULL,GT=2001,SRID=4283)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_HasM -- Tests vertex to see if coordinates include a measure.
SYNOPSIS
Member Function ST_HasM
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc) to see if sdo_gtype has measure ordinate eg 3302 not 3002.
If SDO_GTYPE is null, examines coordinates to see if W ordinate is not null.
RESULT
BOOLEAN (INTEGER) -- 1 is measure ordinate exists, 0 otherwise.
EXAMPLE
select t_vertex().ST_hasM() as eM,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
)
.ST_hasM() as hasM2,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_z => 0.0,
p_sdo_gtype => 3301,
p_sdo_srid => NULL
)
.ST_hasM() as hasM3
from dual;
EM HASM2 HASM3
-- ----- -----
0 0 1
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_hasZ -- Tests vertex to see if coordinates include a Z ordinate.
SYNOPSIS
Member Function ST_hasZ
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc). If D position is 2 then vertex does not have a Z ordinate.
If D position is 3 and measure ordinate position (L) is 0 then vertex has Z ordinate.
If D position is 3 and measure ordinate position (L) is not equal to 0 then vertex does not have a Z ordinate.
If D position is 4 and measure ordinate position (L) is equal to 0 or equal to D (4) then vertex has a Z ordinate.
If D position is 4 and measure ordinate position (L) is equal to 3 then vertex does not have a Z ordinate.
If SDO_GTYPE is null, examines Z and W ordinates of the vertex's coordinates to determine if vertex has Z ordinate.
RESULT
BOOLEAN (INTEGER) -- 1 is has Z ordinate, 0 otherwise.
EXAMPLE
select t_vertex().ST_hasZ() as eZ,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
)
.ST_Dims() as dims2,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_z => 0.0,
p_sdo_gtype => 3001,
p_sdo_srid => NULL
)
.ST_Dims() as dims3
from dual;
EZ DIMS2 DIMS3
---------- ---------- ----------
0 2 3
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_isEmpty -- Checks if Vertex data exists or not.
SYNOPSIS
Member Function ST_isEmpty
Return Integer Deterministic,
DESCRIPTION
If vertex object data are not null returns 1(True) else 0 (False).
cf "POINT EMPTY" WKT
RESULT
BOOLEAN (INTEGER) -- 1 if vertex has not values; 0 if has values
EXAMPLE
select t_vertex().ST_isEmpty() as isEmpty,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
)
.ST_isEmpty() as vIsEmpty
from dual;
ISEMPTY VISEMPTY
------- --------
1 0
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Lrs_Dim -- Tests vertex to see if coordinates include a measure ordinate and returns measure ordinate's position.
SYNOPSIS
Member Function ST_Lrs_Dim
Return Integer Deterministic,
DESCRIPTION
Examines SDO_GTYPE (DLNN etc) measure ordinate position (L) and returns it.
If SDO_GTYPE is null, examines coordinates to see if W ordinate is not null.
RESULT
BOOLEAN (INTEGER) -- L from DLNN.
EXAMPLE
select t_vertex().ST_LRS_Dim() as eLrsDim,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
)
.ST_LRS_Dim() as lrsDim2,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_z => 0.0,
p_sdo_gtype => 3301,
p_sdo_srid => NULL
)
.ST_LRS_Dim() as lrsDim3
from dual;
ELRSDIM LRSDIM2 LRSDIM3
------- ------- -------
0 0 3
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_LRS_Set_Measure -- Sets measure attribute, adjusts sdo_gtype.
SYNOPSIS
Member Function ST_LRS_Set_Measure(p_measure in number)
Return T_Vertex Deterministic,
DESCRIPTION
This function sets the W or Z ordinate the the supplied measure value
depending on the dimensionality of the vertex and its LRS dimension (see ST_LRS_Dim()).
Can change dimensionality of underlying T_Vertex object for example if already 3D,
with Z, but unmeasured: result will be vertex with 4401 sdo_gtype.
PARAMETERS
p_measure (number) - New Measure value.
RESULT
vertex (T_VERTEX)
EXAMPLE
-- ST_LRS_Set_Measure
select t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
)
.ST_LRS_Set_Measure(2.1)
.ST_AsText() as new3301Vertex,
t_vertex(
p_id => 0,
p_x => 0.0,
p_y => 0.0,
p_z => 0.0,
p_sdo_gtype => 3001,
p_sdo_srid => NULL
)
.ST_LRS_Set_Measure(1.2)
.ST_AsText() as new4401Vertex
from dual;
NEW3301VERTEX NEW4401VERTEX
----------------------------------------------------- --------------------------------------------------
T_Vertex(X=0,Y=0,Z=2.1,W=NULL,ID=0,GT=3301,SRID=NULL) T_Vertex(X=0,Y=0,Z=0,W=1.2,ID=0,GT=4401,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Round -- Rounds X,Y,Z and m(w) ordinates to passed in precision.
SYNOPSIS
Member Function ST_Round(p_dec_places_x in integer default 8,
p_dec_places_y in integer default NULL,
p_dec_places_z in integer default 3,
p_dec_places_m in integer default 3)
Return T_Vertex Deterministic,
DESCRIPTION
Applies relevant decimal digits of precision value to ordinate.
For example:
SELF.x := ROUND(SELF.x,p_dec_places_x);
PARAMETERS
p_dec_places_x (integer) - value applied to x Ordinate.
p_dec_places_y (integer) - value applied to y Ordinate.
p_dec_places_z (integer) - value applied to z Ordinate.
p_dec_places_m (integer) - value applied to m Ordinate.
RESULT
vertex (T_VERTEX)
EXAMPLE
-- Geodetic
select T_Vertex(
p_x => 147.5489578,
p_y => -42.53625,
p_id => 1,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
)
.ST_Round(6,6)
.ST_AsText() as vertex
from dual;
VERTEX
-----------------------------------------------------------------------
T_Vertex(X=147.548958,Y=-42.53625,Z=NULL,W=NULL,ID=1,GT=2001,SRID=4283)
-- Planar
select T_Vertex(
p_x => 12847447.54578,
p_y => 4374842.3425,
p_z => 3.2746,
p_id => 1,
p_sdo_gtype=> 3001,
p_sdo_srid => NULL
)
.ST_Round(3,3,2)
.ST_AsText() as vertex
from dual;
VERTEX
---------------------------------------------------------------------------
T_Vertex(X=12847447.546,Y=4374842.343,Z=3.27,W=NULL,ID=1,GT=3001,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_SdoGeometry -- Returns Vertex as a suitably encoded MDSYS.SDO_GEOMETRY object.
SYNOPSIS
Member Function ST_SdoGeometry
Return MDSYS.SDO_GEOMETRY Deterministic,
DESCRIPTION
The encoding of the returned SDO_GEOMETRY object depends on the dimension of the vertex
supplied using p_dims or SELF.ST_Dims() if p_dims is null.
This can be best seen in the source code from T_Vertex Type Body at the end of this documentation.
PARAMETERS
p_dims in integer default null - A dimension value that will override SELF.ST_Dims() eg return 2D from a 3D vertex.
RESULT
point (MDSYS.SDO_GEOMETRY) -- Type of Point geometry depends on what the vertex represents.
EXAMPLE
select T_Vertex(
p_x => 147.5489578,
p_y => -42.53625,
p_id => 1,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
)
.ST_Round(6,6)
.ST_SdoGeometry() as geom
from dual;
GEOM
---------------------------------------------------------------------------
SDO_GEOMETRY(2001,4283,SDO_POINT_TYPE(147.548958,-42.53625,NULL),NULL,NULL)
select T_Vertex(
p_x => 12847447.54578,
p_y => 4374842.3425,
p_z => 3.2746,
p_id => 1,
p_sdo_gtype=> 3001,
p_sdo_srid => NULL
)
.ST_Round(3,3,2)
.ST_SdoGeometry() as geom
from dual;
GEOM
-------------------------------------------------------------------------------
SDO_GEOMETRY(3001,NULL,SDO_POINT_TYPE(12847447.546,4374842.343,3.27),NULL,NULL)
select T_Vertex(
p_x => 12847447.54578,
p_y => 4374842.3425,
p_z => 3.2746,
p_w => 0.002,
p_id => 1,
p_sdo_gtype=> 4401,
p_sdo_srid => NULL
)
.ST_Round(3,3,2)
.ST_SdoGeometry() as geom
from dual;
GEOM
---------------------------------------------------------------------------------------------------------------
SDO_GEOMETRY(4401,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1,1),SDO_ORDINATE_ARRAY(12847447.546,4374842.343,3.27,0.002))
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
SOURCE
-- v_dims integer := NVL(p_dims,SELF.ST_Dims()); -- Begin -- If ( SELF.sdo_gtype is null ) Then -- Return null; -- ElsIf ( SELF.sdo_gtype = 2001 or v_dims = 2) Then -- Return mdsys.sdo_geometry(SELF.sdo_gtype,SELF.sdo_SRID,mdsys.sdo_point_type(self.x,self.y,NULL),null,null); -- ElsIf ( v_dims = 3 ) Then -- -- 3001, 3301, 4001, 4301 and 4401 all stop with Z. GetVertices places M in 4401 in Z spot not W -- Return mdsys.sdo_geometry(SELF.sdo_gtype,SELF.sdo_SRID,mdsys.sdo_point_type(self.x,self.y,self.z),null,null); -- ElsIf ( v_dims = 4 ) Then -- If ( SELF.ST_Dims() = 3 ) Then -- Return mdsys.sdo_geometry(SELF.sdo_gtype,SELF.sdo_SRID,mdsys.sdo_point_type(self.x,self.y,self.z),null,null); -- Else -- Return mdsys.sdo_geometry(SELF.sdo_gtype,SELF.sdo_SRID,NULL,mdsys.sdo_elem_info_array(1,1,1),mdsys.sdo_ordinate_array(self.x,self.y,self.z,self.w)); -- End If; -- End If;
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_SdoPointType -- Returns vertex X,Y and Z ordinates as a MDSYS.SDO_POINT_TYPE object.
SYNOPSIS
Member Function ST_SdoPointType
Return MDSYS.SDO_POINT_TYPE Deterministic,
DESCRIPTION
Constructs a MDSYS.SDO_POINT_TYPE object from the X, Y and Z ordinate variables of the type and returns it.
If Vertex is 2D Z value will be NULL; if vertex dimension is > 3 only the X Y and Z ordinates are returned.
RESULT
vertex (MDSYS.SDO_POINT_TYPE) -- eg MDSYS.SDO_POINT_TYPE(SELF.ST_X,SELF.ST_Y,SELF.ST_Z);
EXAMPLE
-- ST_ToVertexType
select t_vertex(
p_id => 0,
p_x => 1.0,
p_y => 2.0,
p_z => 3.0,
p_w => 4.0,
p_sdo_gtype => 4401,
p_sdo_srid => NULL
).ST_SdoPointType() as sdo_point_type
from dual;
SDO_POINT_TYPE
---------------------------
MDSYS.SDO_POINT_TYPE(1,2,3)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_Self -- Handy method for use with TABLE(T_Vertices) to return element as T_Vertex object.
SYNOPSIS
Member Function ST_Self
Return T_Vertex Deterministic,
DESCRIPTION
When extracting vertices from a geometry into T_Vertex objects via a TABLE function call to T_GEOMETRY.T_Vertices()
it is handy to have a method which allows access to the resulting T_VERTEX row as a single object.
In a sense this method allows access similar to t.COLUMN_VALUE for atmoic datatype access from TABLE functions.
RESULT
vertex (T_VERTEX) -- A single T_Vertex object.
EXAMPLE
set serveroutput on
BEGIN
FOR rec IN (select v.id, v.ST_Self() as vertex
from table(t_geometry(
SDO_GEOMETRY(2002,28355,NULL,
SDO_ELEM_INFO_ARRAY(1,2,1),
SDO_ORDINATE_ARRAY(252282.861,5526962.496,252282.861,5526882.82, 252315.91,5526905.639, 252287.189,5526942.228)) )
.ST_Vertices()) v
)
LOOP
dbms_output.put_line(rec.id || ' => ' || rec.vertex.ST_AsText());
END LOOP;
END;
/
anonymous block completed
1 => T_Vertex(X=252282.9,Y=5526962.5,Z=NULL,W=NULL,ID=1,GT=2001,SRID=28355)
2 => T_Vertex(X=252282.9,Y=5526882.8,Z=NULL,W=NULL,ID=2,GT=2001,SRID=28355)
3 => T_Vertex(X=252315.9,Y=5526905.6,Z=NULL,W=NULL,ID=3,GT=2001,SRID=28355)
4 => T_Vertex(X=252287.2,Y=5526942.2,Z=NULL,W=NULL,ID=4,GT=2001,SRID=28355)
AUTHOR
Simon Greener
HISTORY
Simon Greener - September 2018 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_SetCoordinate -- Is a procedure that sets a vertex's X,Y,Z and W(M) ordinates to passed in values
SYNOPSIS
Member Procedure ST_SetCoordinate(
SELF IN OUT NOCOPY T_Vertex,
p_x in number default 8,
p_y in number default NULL,
p_z in number default 3,
p_w in number default 3)
Return T_Vertex Deterministic,
DESCRIPTION
Assigns supplied values to t_vertex's x,y,z,w ordinates.
EXAMPLE
SELF.x := ROUND(SELF.x,p_dec_places_x);
PARAMETERS
p_x (number) - value assigned to x Ordinate.
p_y (number) - value assigned to y Ordinate.
p_z (number) - value assigned to z Ordinate.
p_w (number) - value assigned to w Ordinate.
EXAMPLE
set serveroutput on size unlimited
declare
v_vertex &&INSTALL_SCHEMA..t_vertex;
begin
v_vertex := &&INSTALL_SCHEMA..T_Vertex(
p_x => 147.5489578,
p_y => -42.53625,
p_id => 1,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
);
v_vertex.ST_SetCoordinate(p_x => 148, p_y => -43);
dbms_output.put_line(v_vertex.ST_AsEWKT());
END;
/
SRID=4283;POINT (148 -43)
PL/SQL procedure successfully completed.
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_SubtendedAngle -- Returns angle subtended by p_start_vertex/SELF/p_end_vertex
SYNOPSIS
Member Function ST_SubtendedAngle(p_start_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_end_vertex in &&INSTALL_SCHEMA..T_Vertex)
Return Number deterministic
DESCRIPTION
This function computes the angle subtended by the three points:
p_start_vertex ---> SELF ---> p_end_vertex
PARAMETERS
p_start_vertex (T_VERTEX) -- Vertex that defines first point in angle.
p_end_vertex (T_VERTEX) -- Vertex that defines last point in angle.
p_projected (integer) -- Usually called from T_GEOMETRY with SELF.projected.
If either 1 for Projected/Planar and 0 for Geographic/Geodetic.
If NULL, TOOLS.ST_GetSridType is called.
RESULT
angle (NUMBER) - Subtended angle in radians.
EXAMPLE
-- Planar in Meters
select Round(
COGO.ST_Degrees(
T_Vertex(
p_id => 1,
p_x => 0,
p_y => 0,
p_sdo_gtype=> 2001,
p_sdo_srid => NULL
)
.ST_SubtendedAngle(
T_Vertex(
p_id => 2,
p_x => 10,
p_y => 0,
p_sdo_gtype=> 2001,
p_sdo_srid => NULL
),
T_Vertex(
p_id => 3,
p_x => 10,
p_y => 10,
p_sdo_gtype=> 2001,
p_sdo_srid => NULL
)
)
),8) as sAngle
from dual;
SANGLE
------
45
-- Geodetic
select COGO.DD2DMS(
COGO.ST_Degrees(
T_Vertex(
p_id => 1,
p_x => 147.5,
p_y => -42.5,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
)
.ST_SubtendedAngle(
T_Vertex(
p_id => 2,
p_x => 147.3,
p_y => -41.5,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
),
T_Vertex(
p_id => 3,
p_x => 147.8,
p_y => -41.1,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
)
)
)
) as sAngle
from dual;
SANGLE
--------------
336°35'43.118"
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_To2D -- Removes and Z or measured attributes, adjusts sdo_gtype.
SYNOPSIS
Member Function ST_To2D
Return T_Vertex Deterministic,
DESCRIPTION
Changes dimensionality of underlying T_Vertex object.
If Vertex is 2D the vertex is returned unchanged.
If the Vertex is 3D or 4D, any Z or W (measure) will be removed; sdo_gtype is set to 2001.
RESULT
vertex (T_VERTEX)
EXAMPLE
-- ST_To2D
select t_vertex(
p_id => 0,
p_x => 1.0,
p_y => 2.0,
p_z => 3.0,
p_w => 4.0,
p_sdo_gtype => 4401,
p_sdo_srid => NULL
)
.ST_To2D()
.ST_AsText() as Vertex2D
from dual;
VERTEX2D
------------------------------------------------------
T_Vertex(X=1,Y=2,Z=NULL,W=NULL,ID=0,GT=2001,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_To3D -- Adds Z attribute, adjusts sdo_gtype.
SYNOPSIS
Member Function ST_To3D(p_keep_measure in integer,
p_default_z in number)
Return T_Vertex Deterministic,
DESCRIPTION
Changes dimensionality of underlying T_Vertex object.
If Vertex is 3D the vertex is returned unchanged unless the vertex is additionally measured
and p_keep_measure = 1. In that case, the Z ordinate will be set to the W (measure) value
and the W (measure) value set to NULL.
If Vertex is 2D the vertex is changed to 3D and the Z ordinate set to p_default_z.
If the Vertex is 4D, any W (measure) is removed unless p_keep_measure is set to 1;
If p_keep_measure is 1, the W value is copied to the Z ordinate and the W ordinate set to null.
The sdo_gtype of the returned vertex is always 3001.
PARAMETERS
p_keep_measure (integer) - If vertex has a measure value, this parameter instructs the function to keep it.
p_default_z (number) - If a Z value has to be created (eg in case of 2D vertex being converted to 3D),
this parameter holds the new value for that ordinate.
RESULT
vertex (T_VERTEX)
EXAMPLE
-- ST_To3D
With Data as (
select t_vertex(
p_id => 0,
p_x => 1.0,
p_y => 2.0,
p_sdo_gtype => 2001,
p_sdo_srid => NULL
) as Vertex2D
from dual
)
select a.vertex2D
.ST_To3D(p_keep_measure => 0,
p_default_z => 3.0)
.ST_LRS_Set_Measure(4.0)
.ST_AsText() as vertex3
from data a;
VERTEX3
------------------------------------------------
T_Vertex(X=1,Y=2,Z=3,W=4,ID=0,GT=4401,SRID=NULL)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_VertexType -- Returns vertex ordinates as a MDSYS.VERTEX_TYPE object.
SYNOPSIS
Member Function ST_VertexType
Return MDSYS.VERTEX_TYPE Deterministic,
DESCRIPTION
Constructs a MDSYS.VERTEX_TYPE object from the ordinate variables of the type and returns it.
RESULT
vertex (MDSYS.VERTEX_TYPE) -- eg MDSYS.VERTEX_TYPE(x=>SELF.ST_X,y=>SELF.ST_Y,z=>SELF.ST_Z,w=>SELF.ST_W,id=>SELF.ST_Id);
EXAMPLE
-- ST_ToVertexType
select t_vertex(
p_id => 0,
p_x => 1.0,
p_y => 2.0,
p_z => 3.0,
p_w => 4.0,
p_sdo_gtype => 4401,
p_sdo_srid => NULL
).ST_VertexType() as VertexType
from dual;
VERTEXTYPE
---------------------------------------------------------------
MDSYS.VERTEX_TYPE(1,2,3,4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,0)
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEX ] [ Methods ]
NAME
ST_WithinTolerance -- Discovers whether supplied vertex is within tolerance of current object vertex (SELF).
SYNOPSIS
Member Function ST_WithinTolerance(p_vertex in &&INSTALL_SCHEMA..T_Vertex,
p_tolerance in number default 0.005)
Return Integer deterministic
DESCRIPTION
This function calculates distance from current object vertex (SELF) to supplied vertex (p_vertex)
If distance <= supplied tolerance the function returns 1 (true) otherwise 0 (false).
p_start_vertex ---> SELF ---> p_end_vertex
PARAMETERS
p_vertex (T_VERTEX) - Vertex that is to be compared to current object (SELF).
p_tolerance (NUMBER) - sdo_tolerance for use with sdo_geom.sdo_distance.
RESULT
BOOLEAN (INTEGER) - 1 is True; 0 is False.
EXAMPLE
-- Geodetic
set serveroutput on size unlimited
With Data as (
select T_Vertex(
p_x => 147.5,
p_y => -42.5,
p_id => 1,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
) as vertex_1,
T_Vertex(
p_x => 147.5,
p_y => -42.5000003,
p_id => 2,
p_sdo_gtype=> 2001,
p_sdo_srid => 4283
) as vertex_2
from dual
)
select a.vertex_1
.ST_Distance(
p_vertex => new T_Vertex(a.vertex_2),
p_tolerance => 0.005,
p_unit => 'unit=M'
) as Distance,
case when t.InTValue = 0 then 0.5 else 0.005 end as tolerance,
a.vertex_1
.ST_WithinTolerance(
p_vertex => new T_Vertex(a.vertex_2),
p_tolerance => case when t.InTValue = 0 then 0.5 else 0.005 end,
p_projected => 0
) as withinTolerance
from data a,
table(TOOLS.generate_series(0,1,1)) t;
DISTANCE TOLERANCE WITHINTOLERANCE
---------- ---------- ---------------
.0333585156 .5 1
.0333585156 .005 0
AUTHOR
Simon Greener
HISTORY
Simon Greener - Jan 2013 - Original coding.
COPYRIGHT
(c) 2005-2018 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ Types ]
NAME
T_VERTEXLIST -- Object type representing a collection of T_VERTICES
DESCRIPTION
An object type that represents an array/collection of T_VERTICES.
Includes Methods on that type.
NOTES
This also implements JTS's OffsetSegmentString.java.
A dynamic list of the vertices in a constructed offset curve.
Automatically removes adjacent vertices which are closer than a given tolerance.
AUTHOR
Simon Greener
HISTORY
Martin Davis - 2016 - Java coding.
Simon Greener - Jul 2019 - extended T_Vertices to include methods derived from OffsetSegmentString.java
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEXLIST ] [ Methods ]
NAME
addOrdinates -- Allows an sdo_ordinate_array to be directly added to the underlying list.
SYNOPSIS
Member Procedure addOrdinates(
SELF IN OUT NOCOPY T_VERTEXLIST,
p_dim in integer,
p_lrs_dim in integer,
p_ordinates in mdsys.sdo_ordinate_array ),
DESCRIPTION
This procedure allows for an sdo_ordinate_array to be directly added to the underlying list.
XYZM ordinates are all supported.
All vertices created adopt the SRID of the VertexList's first vertex.
Coordinate dimensionality and lrs dim should be same as underling VertexList.
ARGUMENTS
p_dim (integer) -- The coordinate dimension used to interpret the numbers in the sdo_ordinate_array.
p_lrs_dim (integer) -- The dimension for the LRS ordiante.
p_ordinates (sdo_ordinate_array) -- The sdo_ordinate_array to be added to the vertex list.
EXAMPLE
-- Add sdo_ordinate_array to existing vertex list.
set serveroutput on size unlimited
declare
v_vList t_vertexlist;
v_vertices &&INSTALL_SCHEMA..T_Vertices;
v_tgeom t_geometry;
begin
v_vList := T_VERTEXLIST(p_segment => &&INSTALL_SCHEMA..T_SEGMENT(p_line=>sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,1))));
dbms_output.put_line('Before v_vList.count=' || v_vList.vertexList.count);
v_vList.addOrdinates(
p_dim => 2,
p_lrs_dim => 0,
p_ordinates => sdo_ordinate_array(1,1,2,2,3,3)
);
dbms_output.put_line('After v_VList.count=' || v_vList.vertexList.count);
end;
/
show errors
Before v_vList.count=2
After v_VList.count=5
PL/SQL procedure successfully completed.
AUTHOR
Simon Greener
HISTORY
Simon Greener - August 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEXLIST ] [ Methods ]
NAME
addVertices -- Enables a collection of vertices to be added to the underlying list.
SYNOPSIS
Member Procedure addVertices(SELF IN OUT NOCOPY &&INSTALL_SCHEMA..T_VERTEXLIST,
p_vertices in &&INSTALL_SCHEMA..T_Vertices,
isForward in ineger default 1)
DESCRIPTION
This procedure allows for a collection of T_VERTEX objects to be added to the underlying list.
XYZM ordinates are all supported.
isForward is 1, the two vertex lists are merged with no tests are carried out to see if first vertex in list to be added is same as end vertex in underlying list.
However, when isForward is 2 the lists are merged with a test for duplicate coordinates.
If isForward is 2, p_vertices is reversed before appending with a duplicate test carried out.
ARGUMENTS
p_vertices (&&INSTALL_SCHEMA..T_Vertices) -- Collection of t_vertex object to add.
isForward (boolean) -- Flag indicating whether vertices should be added in reverse order.
EXAMPLE
-- Add vertices of two linestrings with no test for duplicates
set serveroutput on size unlimited
declare
v_vList t_vertexlist;
v_vertices &&INSTALL_SCHEMA..T_Vertices;
v_tgeom t_geometry;
begin
v_vList := T_VERTEXLIST(p_segment => &&INSTALL_SCHEMA..T_SEGMENT(p_line=>sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,1))));
dbms_output.put_line('Before v_vList.count=' || v_vList.vertexList.count);
v_tgeom := t_geometry(sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,1,2,2,3,3)));
select v.ST_Self() as vertex
bulk collect into v_vertices
from table(v_tgeom.ST_Vertices()) v;
v_vList.addVertices(p_vertices => v_vertices,
p_isForward => 1);
dbms_output.put_line('After v_VList.count=' || v_vList.vertexList.count);
end;
/
show errors
Before v_vList.count=2
After v_VList.count=5
PL/SQL procedure successfully completed.
-- Now add vertices of two linestrings testing for duplicates
set serveroutput on size unlimited
declare
v_vList t_vertexlist;
v_vertices &&INSTALL_SCHEMA..T_Vertices;
v_tgeom t_geometry;
begin
v_vList := T_VERTEXLIST(p_segment => &&INSTALL_SCHEMA..T_SEGMENT(p_line=>sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(0,0,1,1))));
dbms_output.put_line('Before v_vList.count=' || v_vList.vertexList.count);
v_tgeom := t_geometry(sdo_geometry(2002,null,null,sdo_elem_info_array(1,2,1),sdo_ordinate_array(1,1,2,2,3,3)));
select v.ST_Self() as vertex
bulk collect into v_vertices
from table(v_tgeom.ST_Vertices()) v;
v_vList.addVertices(p_vertices => v_vertices,
p_isForward => 2);
dbms_output.put_line('After v_VList.count=' || v_vList.vertexList.count);
end;
/
show errors
Before v_vList.count=2
After v_VList.count=4
PL/SQL procedure successfully completed.
AUTHOR
Simon Greener
HISTORY
Simon Greener - July 2019 - Original coding.
COPYRIGHT
(c) 2005-2019 by TheSpatialDBAdvisor/Simon Greener
[ Top ] [ T_VERTEXLIST ] [ Variables ]
ATTRIBUTES
seglist is a table of t_segment
minimimVertexDistance is min distance between two vertices. If less then any vertex is not added.
SOURCE
vertexList &&INSTALL_SCHEMA..T_VERTICES, minimimVertexDistance Number, dPrecision integer,
[ Top ] [ T_VERTEXLIST ] [ Methods ]
NAME
A collection of T_VERTEXLIST Constructors.
SOURCE
-- Useful as an "Empty" constructor. Constructor Function T_VERTEXLIST(SELF IN OUT NOCOPY T_VERTEXLIST) Return Self As Result, Constructor Function T_VERTEXLIST(SELF IN OUT NOCOPY T_VERTEXLIST, p_vertex in &&INSTALL_SCHEMA..T_VERTEX) Return Self As Result, Constructor Function T_VERTEXLIST(SELF IN OUT NOCOPY T_VERTEXLIST, p_segment in &&INSTALL_SCHEMA..T_SEGMENT) Return Self As Result, Constructor Function T_VERTEXLIST(SELF IN OUT NOCOPY T_VERTEXLIST, p_line in mdsys.sdo_geometry) Return Self As Result,