メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.320146053053 43.1735751112384, 141.317701031429 43.1733343553462, 141.316742954272 43.1733883810567, 141.316533396194 43.1734314742421, 141.316196888934 43.1735006809061, 141.31599894484 43.1732483471088, 141.31582588783 43.1730277221355, 141.315456027782 43.1725433073244, 141.318595041216 43.171009655639, 141.318959828062 43.1714369119065, 141.319247435881 43.1717330102388, 141.321007673857 43.1721068049592, 141.320146053053 43.1735751112384)) ^^http://www.opengis.net/ont/geosparql#wktLiteral