ST_3DIntersects — Returns TRUE if the Geometries "spatially intersect" in 3D - only for points, linestrings, polygons, polyhedral surface (area).


boolean ST_3DIntersects( geometry geomA , geometry geomB );


Overlaps, Touches, Within all imply spatial intersection. If any of the aforementioned returns true, then the geometries also spatially intersect. Disjoint implies false for spatial intersection.

Changed: 3.0.0 SFCGAL backend removed, GEOS backend supports TINs.

Availability: 2.0.0


This function call will automatically include a bounding box comparison that will make use of any indexes that are available on the geometries.

This function supports 3d and will not drop the z-index.

This function supports Polyhedral surfaces.

This function supports Triangles and Triangulated Irregular Network Surfaces (TIN).

This method is also provided by SFCGAL backend.

This method implements the SQL/MM specification. SQL-MM 3: ?

Geometry Examples

SELECT ST_3DIntersects(pt, line), ST_Intersects(pt, line)
	FROM (SELECT 'POINT(0 0 2)'::geometry As pt, 'LINESTRING (0 0 1, 0 2 3)'::geometry As line) As foo;
 st_3dintersects | st_intersects
 f               | t
(1 row)

TIN Examples

SELECT ST_3DIntersects('TIN(((0 0 0,1 0 0,0 1 0,0 0 0)))'::geometry, 'POINT(.1 .1 0)'::geometry);

See Also