メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.044993080267 42.9180293834187, 143.044290840306 42.9179844524745, 143.044411240274 42.9170624098898, 143.045018896906 42.9170901311326, 143.045063018724 42.9170536037743, 143.045118849299 42.9169937867933, 143.045000284998 42.9179756695841, 143.044998988867 42.917986510375, 143.044993080267 42.9180293834187)) ^^http://www.opengis.net/ont/geosparql#wktLiteral