PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual207 / 310LINESTRING / LINESTRING LINESTRING / LINESTRING POLYGON / POINTSELECT ST_Touches(’LINESTRING(0 0, 1 1, 0 2)’::geometry, ’POINT(1 1)’::geometry);st_touches------------f(1 row)SELECT ST_Touches(’LINESTRING(0 0, 1 1, 0 2)’::geometry, ’POINT(0 2)’::geometry);st_touches------------t(1 row)7.8.38 ST_WithinST_Within — Returns true if the geometry A is completely inside geometry BSynopsisboolean ST_Within(geometry A, geometry B);DescriptionReturns TRUE if geometry A is completely inside geometry B. For this function to make sense, the source geometries must bothbe of the same coordinate projection, having the same SRID. It is a given that if ST_Within(A,B) is true and ST_Within(B,A) istrue, then the two geometries are considered spatially equal.Performed by the GEOS moduleImportantDo not call with a GEOMETRYCOLLECTION as an argumentImportantDo not use this function with invalid geometries. You will get unexpected results.