PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual96 / 310ExamplesSELECT ST_Dimension(’GEOMETRYCOLLECTION(LINESTRING(1 1,0 0),POINT(0 0))’);ST_Dimension-----------1See AlsoST_NDims7.4.5 ST_EndPointST_EndPoint — Returns the last point of a LINESTRING geometry as a POINT.Synopsisboolean ST_EndPoint(geometry g);DescriptionReturns the last point of a LINESTRING geometry as a POINT or NULL if the input parameter is not a LINESTRING.This method implements the SQL/MM specification. SQL-MM 3: 7.1.4This function supports 3d and will not drop the z-index.Examplespostgis=# SELECT ST_AsText(ST_EndPoint(’LINESTRING(1 1, 2 2, 3 3)’::geometry));st_astext------------POINT(3 3)(1 row)postgis=# SELECT ST_EndPoint(’POINT(1 1)’::geometry) IS NULL AS is_null;is_null----------t(1 row)--3d endpointSELECT ST_AsEWKT(ST_EndPoint(’LINESTRING(1 1 2, 1 2 3, 0 0 5)’));st_asewkt--------------POINT(0 0 5)(1 row)See AlsoST_PointN, ST_StartPoint