メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.772897285001 43.2066361033394, 141.773357794755 43.206879315078, 141.772618056564 43.2076288903821, 141.772154310093 43.2074121757046, 141.7717907214 43.2072237275235, 141.772530931419 43.2064572809432, 141.772897285001 43.2066361033394)) ^^http://www.opengis.net/ont/geosparql#wktLiteral