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STCogo2Line: Creating (Multi)LineStrings geometries from COGO XML instructions
Previously I wrote about a function that converted the segments of a (Multi)LineString into a COGO XML document that contains all the instructions (bearing, distances,
5 August, 2020
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STLine2Cogo: Converting LineStrings to COGO XML
I have just written a useful function for my new package of TSQL functions for SQL Server Spatial called STLine2Cogo which converts (exports) a (Multi)LineString
5 August, 2020
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STVectorize: Break Linestring/Polygon elements into 2 point vectors (or 3 point circular curves)
I demonstrated in this article the usefulness of having a vectorising function in one’s spatial database kitbag (there are Vectorize functions in my CENTROID and
5 August, 2020
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STScale: Function to Scale a geometry object
Here is a simple scaling function for use with SQL Server Spatial’s geometry data type. Now some tests. Results sType geomWKT Scaled2D LINESTRING (0.5 1.5
31 July, 2020
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STGeometry2MBR/STGeography2MBR: Compute and return MBR ordinates
SQL Server Spatial’s STEnvelope() function returns the minimum bounding rectangle of a geometry object but as a 5 vertex polygon. To access the lower left
31 July, 2020
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STExtractPolygon: Extract Polygons from result of STIntersection in SQL Server Spatial
Oracle customers have asked me for help in the past dealing with compound objects or collections that result from thinning or geoprocessing (intersection etc) of
27 July, 2020
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STRound: Function to round ordinates of a SQL Server Spatial geometry object
The result of many geoprocessing operations in any spatial type can be geometries with ordinates (X, Y etc) that have far more decimal digits of
27 July, 2020
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STExtract: Extract elements of a geometry object
Of the functions I have written for Oracle, those that allow me to extract (sub)elements of compound (objects consisting of linestrings and circular arcs) and
27 July, 2020
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STNumRings: Counting number of polygon rings
Here is an “ease of use” function that allows you to count the number of rings of a polygon or multipolygon geometry object in SQL
27 July, 2020
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STFilterRings: Removing rings from Polygon based on area.
A function that have found use in Oracle and PostGIS is one that allows a user to filter out the rings of a polygon or
27 July, 2020
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