メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.547374161822 43.2385250150435, 143.545854967693 43.2386064812904, 143.545718540931 43.237027029661, 143.547225849952 43.2369630024923, 143.547260061305 43.2369614883754, 143.547374161822 43.2385250150435)) ^^http://www.opengis.net/ont/geosparql#wktLiteral