メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.339065993377 43.0337315544635, 141.338999660792 43.0341909869932, 141.338970865524 43.0344071634966, 141.337242535622 43.034313073849, 141.337246395813 43.0342789941077, 141.33727939457 43.0339866130515, 141.337320241565 43.0336240344809, 141.337364125137 43.0333087420615, 141.337413697568 43.0329523518576, 141.339149375629 43.033059157421, 141.339106808669 43.0334027335565, 141.339065993377 43.0337315544635)) ^^http://www.opengis.net/ont/geosparql#wktLiteral