メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.045584253265 37.9250103542635, 139.046124284507 37.9249166168183, 139.046328891444 37.9256467470062, 139.046506504961 37.9262041228844, 139.0464139706 37.9262244026296, 139.046340953631 37.9262405099454, 139.045934322121 37.9263560123837, 139.045912680165 37.926361463159, 139.045464874557 37.92647307192, 139.045261453101 37.9257160455682, 139.045099702102 37.9250963694741, 139.045584253265 37.9250103542635)) ^^http://www.opengis.net/ont/geosparql#wktLiteral