メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.771334031369 35.4355433351061, 136.770871583617 35.4354658176762, 136.770438739083 35.4353877961658, 136.770437576945 35.4344302279783, 136.77116697789 35.4343905885379, 136.771259839527 35.4353277517837, 136.771311162928 35.4353195380656, 136.771334031369 35.4355433351061)) ^^http://www.opengis.net/ont/geosparql#wktLiteral