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Linear Referencing System (LRS) Functions for TSQL
This articles logically steps through all the functions in a complete package of Linear Referencing functions that I have written for TSQL. The article both demonstrates the power of SQL Server Spatial but what can be done with TSQL.
6 December, 2020
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Snap Point to SQL Server Spatial geometry using TSQL
This function uses the SQL Server Spatial ShortestLineTo function to compute a point on the boundary of the supplied geometry nearest to the supplied point. If the snap distance is < the user supplied @p_snap_within distance, the computed point is returned. However, if the distance is > the user supplied @p_snap_within distance the original point is returned.
16 August, 2019
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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
19 July, 2019
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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
19 July, 2019
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STLineInterpolatePoint
STLineInterpolatePoint is a PostGIS like function that returns point geometry at supplied fraction along linestring.
19 July, 2019
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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.
12 July, 2019
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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
5 July, 2019
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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
5 July, 2019
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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
5 July, 2019
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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
5 July, 2019
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