メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.31142367965 43.0935879700179, 141.311283244001 43.0936659376135, 141.311005633019 43.0938344875482, 141.310805542871 43.0939476211055, 141.309967456284 43.0932086142974, 141.310469683177 43.0929168688858, 141.310870340712 43.0926651468638, 141.311694286103 43.0934192220842, 141.31142367965 43.0935879700179)) ^^http://www.opengis.net/ont/geosparql#wktLiteral