メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343037261202 43.0387836181033, 141.343856973898 43.0388588962226, 141.34377883955 43.0395034146384, 141.343764983865 43.0395328439763, 141.343746001343 43.039682566667, 141.34369386048 43.0401504110184, 141.343593642289 43.04013238682, 141.342990981963 43.0401030653671, 141.342736333504 43.0400826899121, 141.342256343281 43.0400443510696, 141.342336382532 43.0393888069696, 141.342379595144 43.0390459391155, 141.342383835788 43.0390119325583, 141.342421555104 43.0387295756007, 141.343037261202 43.0387836181033)) ^^http://www.opengis.net/ont/geosparql#wktLiteral