ST_Force3D — 도형을 XYZ 모드로 강제합니다. ST_Force3DZ라고도 합니다.
geometry ST_Force3D(
geometry geomA, float Zvalue = 0.0)
;
Forces the geometries into XYZ mode. This is an alias for ST_Force3DZ. If a geometry has no Z component, then a Zvalue
Z coordinate is tacked on.
개선 사항: 2.0.0 버전부터 다면체 표면(polyhedral surface)을 지원합니다.
변경 사항: 2.1.0 미만 버전, 즉 2.0.x 버전까지 이 함수의 명칭은 ST_Force_3D였습니다.
Changed: 3.1.0. Added support for supplying a non-zero Z value.
This function supports Polyhedral surfaces.
This method supports Circular Strings and Curves.
This function supports 3d and will not drop the z-index.
--Nothing happens to an already 3D geometry SELECT ST_AsEWKT(ST_Force3D(ST_GeomFromEWKT('CIRCULARSTRING(1 1 2, 2 3 2, 4 5 2, 6 7 2, 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_Force3D('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))