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ST_LocateBetween

ST_LocateBetween
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Name

ST_LocateBetween — Returns the portions of a geometry that match a measure range.

Synopsis

geometry ST_LocateBetween ( geometry geom , float8 measure_start , float8 measure_end , float8 offset = 0 ) ;

Description

Return a geometry (collection) with the portions of the input measured geometry that match the specified measure range (inclusively).

If the offset is provided, the result is offset to the left or right of the input line by the specified distance. A positive offset will be to the left, and a negative one to the right.

Clipping a non-convex POLYGON may produce invalid geometry.

The semantic is specified by the ISO/IEC 13249-3 SQL/MM Spatial standard.

Availability: 1.1.0 by old name ST_Locate_Between_Measures.

Changed: 2.0.0 - in prior versions this used to be called ST_Locate_Between_Measures.

Enhanced: 3.0.0 - added support for POLYGON, TIN, TRIANGLE.

This function supports M coordinates.

Examples 

SELECT ST_AsText(
  ST_LocateBetween(
       'MULTILINESTRING M ((1 2 3, 3 4 2, 9 4 3),(1 2 3, 5 4 5))':: geometry,
       1.5,
       3 ));

							 st_asewkt
------------------------------------------------------------------------
 GEOMETRYCOLLECTION M (LINESTRING M (1 2 3,3 4 2,9 4 3),POINT M (1 2 3))

See Also

ST_LocateAlong , ST_LocateBetweenElevations

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