メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.359389317456 37.3141807089624, 140.358976271048 37.3150614043351, 140.35822198892 37.3149079136146, 140.358326965873 37.3139971919197, 140.358661403827 37.3135849973009, 140.359100717537 37.3141191975366, 140.359389317456 37.3141807089624)) ^^http://www.opengis.net/ont/geosparql#wktLiteral