メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.407100287747 32.1138326998048, 131.406291365727 32.1138727113288, 131.405050915297 32.1139338976208, 131.404772249262 32.1127966457977, 131.404665258648 32.1124511697445, 131.405031153526 32.1120594390861, 131.405690635887 32.1120495066421, 131.406238405268 32.1120411972752, 131.406873851097 32.1120340134868, 131.407728033373 32.1121888154335, 131.407100287747 32.1138326998048)) ^^http://www.opengis.net/ont/geosparql#wktLiteral