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Linear Referencing System (LRS) Functions for TSQL
Introduction I have written a complete package of Linear Referencing functions in TSQL. They have been available for over two years. They have not been
STPointToCircularArc
STPointToCircularArc — Return a measured point by snapping provided point to the provided CircularString Function Specification Description This function snaps supplied point to @p_circularString, returning
STLocateBetweenElevations
STLocateBetweenElevations — Computes and returns elements that intersect the specified Z range. Function Specification Description Is implementation of PostGIS: Processes the supplied (3D, 3DM) (multi)linestring
STLineSubstring
STLineSubstring — Returns a substring of the providec linestring starting and ending at the given fractions (between 0 and 1) of total 2D length or
STLineInterpolatePoint
STLineInterpolatePoint is a PostGIS like function that returns point geometry at supplied fraction along linestring.
STLineLocatePoint
This function, given a point near a the supplied measure @p_linestring, returns the measure/Measure_Range or length/Total_Length ratio of the found position.
STFindPointByMeasure
STFindPointByMeasure — Returns (possibly offset) point geometry at supplied measure along linestring. Function Specification. Description. Given a measure, this function returns a geometry point at
STFindPointByRatio
STFindPointByRatio — Returns (possibly offset) point geometry at supplied length ratio along linestring. Function Specification. Description. Given a ratio (0 to 1.0), this function returns
STFindPointByLength
Function finds point at position @p_length along linestring (does not need to be measured) with optional offset to left or right of @p_linestring
STLocateAlong
STLocateAlong — Returns (possibly offset) point geometry at supplied measure along linestring. Function Specification. Description. This function is identical to STFindPointByName and so is a
Documentation
- MySQL Spatial General Function Documentation
- Oracle Spatial Exporter Package Documentation
- Oracle Spatial Object Function Documentation
- Oracle Spatial Object Function Documentation (Multi Page Version)
- PostGIS pl/pgSQL Function Documentation
- SC4O Oracle Java Topology Suite (Stored Procedures) Package Documentation
- SQL Server Spatial General TSQL Function Documentation
- SQL Server Spatial LRS TSQL Function Documentation