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isValid, isSimple, Dimension and CoordDim methods for SDO_Geometry
I have just added to my Java Spatial For Oracle (JS4O) project exposure of the JTS/Jaspa functions for:
- ST_IsValid
- ST_IsSimple
- ST_Dimension
- ST_CoordDim
Here are the type signatures in the JTS PL/SQL package.
FUNCTION ST_IsValid(p_geom IN mdsys.sdo_geometry ) RETURN NUMBER Deterministic; . FUNCTION ST_IsSimple(p_geom IN mdsys.sdo_geometry ) RETURN NUMBER Deterministic; . FUNCTION ST_Dimension(p_geom IN mdsys.sdo_geometry) RETURN NUMBER Deterministic; . FUNCTION ST_CoordDim(p_geom IN mdsys.sdo_geometry) RETURN NUMBER Deterministic;
Here is a test of these functions.
SELECT DISTINCT SC4O.ST_IsValid(a.geometry) AS ST_isValid, SC4O.ST_IsSimple(a.geometry) AS ST_isSimple, SC4O.ST_Dimension(a.geometry) AS ST_Dimension, SC4O.ST_CoordDim(a.geometry) AS ST_CoordDim, CASE WHEN a.geometry.get_gtype() IN (1) THEN 'Point' WHEN a.geometry.get_gtype() IN (5) THEN 'MultiPoint' WHEN a.geometry.get_gtype() IN (2) THEN 'Line' WHEN a.geometry.get_gtype() IN (6) THEN 'MultiLine' WHEN a.geometry.get_gtype() IN (3) AND geom.isRectangle(a.geometry.sdo_elem_info)>0 THEN 'Area(Rectangle)' WHEN a.geometry.get_gtype() IN (3) AND geom.isRectangle(a.geometry.sdo_elem_info)=0 THEN 'Area' WHEN a.geometry.get_gtype() IN (7) AND geom.isRectangle(a.geometry.sdo_elem_info)>0 THEN 'MultiArea(Rectangle)' WHEN a.geometry.get_gtype() IN (7) AND geom.isRectangle(a.geometry.sdo_elem_info)=0 THEN 'MultiArea' ELSE 'Not Supported' END geometryType FROM ORACLE_TEST_GEOMETRIES a WHERE a.geometry IS NOT NULL AND a.geometry.sdo_gtype IS NOT NULL AND a.geometry.get_dims() = 2 AND sdo_geom.validate_geometry(a.geometry, 0.0005) = 'TRUE' AND ( a.geometry.get_gtype() IN (1,5) OR ( a.geometry.sdo_elem_info IS NOT NULL AND geom.isCompound(a.geometry.sdo_elem_info) = 0 ) ) AND a.geometry.get_gtype() <> 4 ORDER BY 5,1,3; -- Results ST_ISVALID ST_ISSIMPLE ST_DIMENSION ST_COORDDIM GEOMETRYTYPE ---------- ----------- ------------ ----------- -------------------- 1 1 2 2 Area 1 1 2 2 Area(Rectangle) 1 0 1 2 Line 1 1 1 2 Line 1 1 2 2 MultiArea 1 1 2 2 MultiArea(Rectangle) 1 0 1 2 MultiLine 1 1 1 2 MultiLine 1 1 0 2 MultiPoint 1 1 0 2 Point . 10 ROWS selected
I hope this is helpful to someone.
Documentation
- MySQL Spatial General Functions
- Oracle LRS Objects
- Oracle Spatial Exporter (Java + pl/SQL)
- Oracle Spatial Object Functions
- Oracle Spatial Object Functions (Multi Page)
- PostGIS pl/pgSQL Functions
- SC4O Oracle Java Topology Suite (Java + pl/SQL)
- SQL Server Spatial General TSQL Functions
- SQL Server Spatial LRS TSQL Functions