メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350799815307 43.0750838627323, 141.350932695813 43.0750994913528, 141.351161022275 43.0751263461243, 141.351618525324 43.0751801564179, 141.351471972247 43.0757552131974, 141.35132620981 43.0763415996993, 141.350234350145 43.0761830681267, 141.349756567845 43.0761248011273, 141.34990888167 43.0755506367504, 141.350033215011 43.0749936934571, 141.350486272237 43.0750469835154, 141.350799815307 43.0750838627323)) ^^http://www.opengis.net/ont/geosparql#wktLiteral