メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.141035549684 38.9333834234916, 141.140671098816 38.9333783987518, 141.13889381023 38.9333834063099, 141.139070809263 38.9328967541108, 141.140352663662 38.9328813615336, 141.141070762085 38.932864272587, 141.141058055291 38.933118451538, 141.141070990514 38.9333741107317, 141.141035549684 38.9333834234916)) ^^http://www.opengis.net/ont/geosparql#wktLiteral