[Qgis-user] Equivalent for ST_LocateAlong in QGIS expressions

[Anita Graser]

Hi,

Is there an equivalent to PostGIS' ST_LocateAlong for QGIS expressions yet?

https://postgis.net/docs/ST_LocateAlong.html

SELECT ST_AsText(the_geom)
		FROM
		(SELECT ST_LocateAlong(
			ST_GeomFromText('MULTILINESTRINGM((1 2 3, 3 4 2, 9 4 3),
		(1 2 3, 5 4 5))'),3) As the_geom) As foo;

						 st_asewkt
-----------------------------------------------------------
 MULTIPOINT M (1 2 3)


We have line_interpolate_point but it does not take measure values into
account:

function line_interpolate_point

Returns the point interpolated by a specified distance along a linestring
geometry.


Thanks and best wishes,

Anita
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