メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.404285993758 43.8199739432785, 142.404711671154 43.8202997598535, 142.403930419177 43.820862541492, 142.403121294818 43.8214453615769, 142.402281276203 43.8220504359775, 142.401876055355 43.821767074487, 142.400587407068 43.8208659018616, 142.401052207432 43.8205317198988, 142.401429161305 43.8202606961721, 142.401841252863 43.8199643952113, 142.402229297655 43.8196853897544, 142.402673940765 43.8193656960318, 142.40306388111 43.81908531326, 142.403768921403 43.8195781735316, 142.404285993758 43.8199739432785)) ^^http://www.opengis.net/ont/geosparql#wktLiteral