メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.519765849096 43.8515391587108, 141.517319499271 43.8509389539785, 141.517461539904 43.8508457222912, 141.517586130869 43.8507093409075, 141.517514274545 43.8503793742922, 141.518051010829 43.8505020920696, 141.518331961658 43.8504840594592, 141.520025589586 43.8509375865644, 141.519765849096 43.8515391587108)) ^^http://www.opengis.net/ont/geosparql#wktLiteral