/** * Returns a geometric object that represents the Point set difference of two geometries. * * @param node1 xml element containing gml object(s) * @param node2 xml element containing gml object(s) * @return difference geometry as a gml element * @throws QueryException query exception */ @Deterministic public ANode difference(final ANode node1, final ANode node2) throws QueryException { final Geometry geo1 = checkGeo(node1); final Geometry geo2 = checkGeo(node2); return gmlWriter(geo1.difference(geo2)); }