id summary reporter owner description type status priority milestone component version resolution keywords cc 2756 ST_Extrude of M geometries looses M robe colivier "I'm not sure if this is a bug or anything that can be done about it. At very least we should probably document the behavior that M coordinates are lost during extrude process. {{{ SELECT ST_AsText(ST_Extrude('LINESTRING M (-10 50 1,50 -10 1)'::geometry, 20.1,20.1,20.1) ); }}} This is one of the garden monkey tests which yields: {{{ POLYHEDRALSURFACE Z (((-10 50 0,50 -10 0,70.1 10.1 20.1,10.1 70.1 20.1,-10 50 0))) }}} " defect new low PostGIS SFCGAL sfcgal 2.1.x