メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.862498657317 43.3325632513071, 141.862713150134 43.3332981990722, 141.861513634799 43.3334817808216, 141.861289414542 43.3327526345465, 141.861194423256 43.332443784277, 141.861580324774 43.3323801074526, 141.861686483135 43.3323631666752, 141.862422668877 43.3322386426219, 141.862498657317 43.3325632513071)) ^^http://www.opengis.net/ont/geosparql#wktLiteral