メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.404254869841 40.7716691196305, 141.402889638573 40.7763786749838, 141.394909440475 40.7762387214493, 141.394947730609 40.7747924895619, 141.389457997505 40.7757119063644, 141.388817684265 40.7736335480401, 141.389276643909 40.7712856338991, 141.39207297822 40.7713583189517, 141.398215567498 40.7710910896035, 141.40332252398 40.7709059312463, 141.404335478058 40.771259242099, 141.404254869841 40.7716691196305)) ^^http://www.opengis.net/ont/geosparql#wktLiteral