メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.324046164063 43.0749579304716, 141.32318595676 43.0753362921597, 141.322546820674 43.0756228336688, 141.322176556709 43.0757145616537, 141.32176649165 43.0757990731718, 141.321459981328 43.0758427896563, 141.321819384819 43.0754536233663, 141.322594064579 43.0747354510777, 141.323516263695 43.0743237681142, 141.324046164063 43.0749579304716)) ^^http://www.opengis.net/ont/geosparql#wktLiteral