Name
ST_MSize — Returns the M size of a geometry.
Synopsis
float ST_MSize(geometry geom);
Description
Returns the M size of a geometry, computed as ST_MMax(geom) - ST_MMin(geom), or null if the geometry lacks M values.
Cette fonction prend en charge la 3D et ne supprime pas l'indice z.
Cette méthode prend en charge les types Circular String et Curve.
Availability: 3.7.0
Exemples
SELECT ST_MSize('LINESTRING M (1 2 3, 4 6 8)');
5