メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.927766063769 43.8263934936085, 143.928771344477 43.8274182852248, 143.928273489781 43.8276689468011, 143.927849566394 43.8278823371169, 143.927484260094 43.8280662292588, 143.926233918648 43.8286955618251, 143.92560098063 43.8290141164591, 143.923954010655 43.8278620588898, 143.923066158279 43.8272410019287, 143.923699589381 43.8269194673154, 143.92504514477 43.8262361629149, 143.925474508368 43.8260090602871, 143.926735026909 43.8253424734641, 143.927766063769 43.8263934936085)) ^^http://www.opengis.net/ont/geosparql#wktLiteral