メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.342775843933 43.0847820380378, 141.342593163623 43.0855156664523, 141.341979444394 43.0854381425786, 141.341532343233 43.0853706602559, 141.341077871965 43.0853020625249, 141.341272973508 43.0845731073975, 141.341477575003 43.0838372642432, 141.342955552527 43.084041423435, 141.342867486976 43.0844043258933, 141.342775843933 43.0847820380378)) ^^http://www.opengis.net/ont/geosparql#wktLiteral