メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.342556065803 43.0825236475573, 141.342867822107 43.0825742278849, 141.343309466482 43.0826331511767, 141.343131977809 43.0833279300714, 141.342955552527 43.084041423435, 141.341477575003 43.0838372642432, 141.341645343839 43.0831263059097, 141.341731401134 43.0827828004912, 141.341828317518 43.0824315035318, 141.342556065803 43.0825236475573)) ^^http://www.opengis.net/ont/geosparql#wktLiteral