This topic describes the ST_3DWithin function. This function checks whether the spatial range represented by a 3D geographic grid is included by a geometry.
Syntax
bool ST_3DWithin(geometry geom3d, geomgrid gridcode);
bool ST_3DWithin(geomgrid gridcode, geometry geom3d);
bool ST_3DWithin(meshgeom geom3d, geomgrid gridcode);
bool ST_3DWithin(geomgrid gridcode, meshgeom geom3d);
bool ST_3DWithin(sfmesh geom3d, geomgrid gridcode);
bool ST_3DWithin(geomgrid gridcode, sfmesh geom3d);
bool ST_3DWithin(vomesh geom3d, geomgrid gridcode);
bool ST_3DWithin(geomgrid gridcode, vomesh geom3d);
bool ST_3DWithin(geomgrid gridcode1, geomgrid gridcode2);Parameters
Parameter | Description |
gridcode/gridcode1/gridcode2 | The geographic grid object. |
geom3d | The 3D geometry. |
Description
This function returns the spatial relationship between a grid and a geometry. The geometry must use the CGC2000 spatial reference system. In addition, the spatial reference system identifier (SRID) of the geometry must be 4490.
Examples
SELECT ST_3DWithin('srid=4490;POINT(116.31522216796875 39.910277777777778 1001.8)'::geometry,
ST_GridFromText('GZ00262064446046072072'));
st_3dwithin
-----------------
t
SELECT ST_3DWithin(ST_GridFromText('GZ0026'),
st_meshgeomfromtext('srid=4490;SOLID=TRUE;MESHGEOM(PATCH(INDEXSURFACE Z (VERTEX(115.966 38.9757000000001 3000,
116 38.9757000000001 3000,116 38.9999999999999 3000,115.966 38.9999999999999 3000,116 38.9999999999999 0,
116 38.9757000000001 0,115.966 38.9757000000001 0,115.966 38.9999999999999 0),
INDEX((0,1,2),(2,3,0),(4,5,6),(6,7,4),(3,7,6),(6,0,3),(0,6,5),(5,1,0),(1,5,4),(4,2,1),(2,4,7),(7,3,2)))))'));
st_3dwithin
-----------------
f
SELECT ST_3DWithin(ST_GridFromText('GZ00262064'), st_meshfromtext(
'{"version" : 1, "srid" : 4490, "root" : 0,
"meshgeoms" : ["MESHGEOM(PATCH(POLYGON Z ((0 0 0,1 0 0,1 1 0,0 1 0,0 0 0))))"],
"primitives" : [{"meshgeom" : 0}], "nodes" : [{"primitive" : 0,"matrix" : [0.012,0,0,116,0,0.009,0,39,0,0,1000,0,0,0,0,1]}]}'));
st_3dwithin
-----------------
f
SELECT ST_3DWithin(ST_VOMeshFromText(
'SRID=4490;LOD=2;VOMESH(VERTEX(COORDS(116.012 39 0,116 39.009 0,115.988 39 0,116 38.991 0,116 39 1000)),
FACE(INDEX((0,1,2,3),(1,0,4),(2,1,4),(3,2,4),(0,3,4))),CELL(INDEX((0,1,2,3,4)),DIRECTION((0,1,1,1,0))))'),
ST_GridFromText('GZ002'));
st_3dwithin
-----------------
f
SELECT ST_3DWithin(ST_GridFromText('GZ0026206435'),
ST_GridFromText('GZ002620643'));
st_3dwithin
-----------------
t