メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.369166658778 43.0846701326774, 141.369024883927 43.0852356101195, 141.368875998027 43.0857815511061, 141.368873403546 43.0858018559027, 141.368348080634 43.0857404224971, 141.36789604846 43.0856868655977, 141.367879764868 43.0856849117799, 141.367356749678 43.0856098479498, 141.367494869509 43.085026058853, 141.367632627926 43.0844672348549, 141.368791369721 43.084618295256, 141.369166658778 43.0846701326774)) ^^http://www.opengis.net/ont/geosparql#wktLiteral