PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual122 / 310DescriptionForces the geometries into XYZ mode. This is an alias for ST_Force_3DZ. If a geometry has no Z component, then a 0 Zcoordinate is tacked on.This function supports 3d and will not drop the z-index.This method supports Circular Strings and CurvesExamples--Nothing happens to an already 3D geometrySELECT ST_AsEWKT(ST_Force_3D(ST_GeomFromEWKT(’CIRCULARSTRING(1 1 2, 2 3 2, 4 5 2, 6 72, 5 6 2)’)));st_asewkt-----------------------------------------------CIRCULARSTRING(1 1 2,2 3 2,4 5 2,6 7 2,5 6 2)←↪SELECT ST_AsEWKT(ST_Force_3D(’POLYGON((0 0,0 5,5 0,0 0),(1 1,3 1,1 3,1 1))’));st_asewkt--------------------------------------------------------------POLYGON((0 0 0,0 5 0,5 0 0,0 0 0),(1 1 0,3 1 0,1 3 0,1 1 0))See AlsoST_AsEWKT, ST_Force_2D, ST_Force_3DM, ST_Force_3DZ7.5.5 ST_Force_3DZST_Force_3DZ — Forces the geometries into XYZ mode. This is a synonym for ST_Force_3D.Synopsisgeometry ST_Force_3DZ(geometry geomA);DescriptionForces the geometries into XYZ mode. This is a synonym for ST_Force_3DZ. If a geometry has no Z component, then a 0 Zcoordinate is tacked on.This function supports 3d and will not drop the z-index.This method supports Circular Strings and CurvesExamples