PolarDB:ST_3DContains

Syntax

bool ST_3DContains(geometry geom3d, geomgrid gridcode);
bool ST_3DContains(geomgrid gridcode, geometry geom3d);
bool ST_3DContains(meshgeom geom3d, geomgrid gridcode);
bool ST_3DContains(geomgrid gridcode, meshgeom geom3d);
bool ST_3DContains(sfmesh geom3d, geomgrid gridcode);
bool ST_3DContains(geomgrid gridcode, sfmesh geom3d);
bool ST_3DContains(vomesh geom3d, geomgrid gridcode);
bool ST_3DContains(geomgrid gridcode, vomesh geom3d);
bool ST_3DContains(geomgrid gridcode1, geomgrid gridcode2);

Parameters

Description

ST_3DContains returns the spatial relationship between a grid and a geometry.

The 3D geometry must use the CGC2000 (China Geodetic Coordinate System 2000) spatial reference system with a Spatial Reference System Identifier (SRID) of 4490.

Examples

The following examples cover all supported argument type combinations.

Geomgrid contains a geometry point

Grid GZ00262064446046072072 fully contains the specified 3D point, so the function returns t.

SELECT ST_3DContains(
  ST_GridFromText('GZ00262064446046072072'),
  'srid=4490;POINT(116.31522216796875 39.910277777777778 1001.8)'::geometry
);

 st_3dcontains
---------------
 t

Geomgrid contains a meshgeom

The meshgeom solid extends beyond the bounds of grid GZ0026, so the function returns f.

SELECT ST_3DContains(
  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_3dcontains
---------------
 f

Geomgrid contains an sfmesh

The sfmesh (JSON format) is not fully contained within grid GZ00262064, so the function returns f.

SELECT ST_3DContains(
  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_3dcontains
---------------
 f

Geomgrid contains a vomesh

The vomesh is not fully contained within grid GZ00262064, so the function returns f.

SELECT ST_3DContains(
  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('GZ00262064')
);

 st_3dcontains
---------------
 f

Geomgrid contains another geomgrid

Grid GZ00262064 is a coarser-level grid that fully contains the finer-level grid GZ002620643, so the function returns t.

SELECT ST_3DContains(
  ST_GridFromText('GZ00262064'),
  ST_GridFromText('GZ002620643')
);

 st_3dcontains
---------------
 t

What's next

• ST_GridFromText — construct a geomgrid from a grid code string

• ST_MeshGeomFromText — construct a meshgeom from WKT

• ST_VOMeshFromText — construct a vomesh from WKT

• ST_3DIntersects — check whether two 3D geometries or grids intersect