メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.339326293865 43.0317533362997, 141.339264848608 43.0321808067169, 141.339237761844 43.0324112043546, 141.339184777246 43.0327527288398, 141.339149375629 43.033059157421, 141.337413697568 43.0329523518576, 141.337464297724 43.0325461052741, 141.337495407963 43.032296892056, 141.337540266831 43.0319156367581, 141.337571847183 43.0316476493821, 141.338342242306 43.0316864230455, 141.339326293865 43.0317533362997)) ^^http://www.opengis.net/ont/geosparql#wktLiteral