Spatial Function Reference Name Description Introduced ST_MPointFromText() , ST_MultiPointFromText() Construct MultiPoint from WKT ST_MPointFromWKB() , ST_MultiPointFromWKB() Construct MultiPoint from WKB ST_MPolyFromText() , ST_MultiPolygonFromText() Construct MultiPolygon from WKT ST_MPolyFromWKB() , ST_MultiPolygonFromWKB() Construct MultiPolygon from WKB ST_NumGeometries() Return number of geometries in geometry collection ST_NumInteriorRing() , ST_NumInteriorRings() Return number of interior rings in Polygon ST_NumPoints() Return number of points in LineString ST_Overlaps() Whether one geometry overlaps another ST_PointAtDistance() The point a given distance along a LineString 8.0.24 ST_PointFromGeoHash() Convert geohash value to POINT value ST_PointFromText() Construct Point from WKT ST_PointFromWKB() Construct Point from WKB ST_PointN() Return N-th point from LineString ST_PolyFromText() , ST_PolygonFromText() Construct Polygon from WKT ST_PolyFromWKB() , ST_PolygonFromWKB() Construct Polygon from WKB ST_Simplify() Return simplified geometry ST_SRID() Return spatial reference system ID for geometry ST_StartPoint() Start Point of LineString ST_SwapXY() Return argument with X/Y coordinates swapped ST_SymDifference() Return point set symmetric difference of two geometries ST_Touches() Whether one geometry touches another ST_Transform() Transform coordinates of geometry 8.0.13 ST_Union() Return point set union of two geometries ST_Validate() Return validated geometry 2294