Somebody know how can I calculate the x,y,z,m parameters from a MultiLineStringZM in Postgis?
I would like to know x,y,z and m from the points what are made the polyline.
When I try calculate it by this way "*st_x,st_y, st_z, st_m*" postgis go up an error message: ERROR: Argument to M() must be a point
Any idea?
Thanks,
JM