メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.340430969952 43.0331496691299, 141.34115528211 43.0332007867072, 141.341060439631 43.0338716879616, 141.340971777996 43.034571895565, 141.339936647209 43.0345002998886, 141.339365448411 43.0344608016553, 141.338969015498 43.0344414699506, 141.338970865524 43.0344071634966, 141.338999660792 43.0341909869932, 141.339065993377 43.0337315544635, 141.339106808669 43.0334027335565, 141.339149375629 43.033059157421, 141.340430969952 43.0331496691299)) ^^http://www.opengis.net/ont/geosparql#wktLiteral