メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.764711712455 42.9084118821676, 140.762468429452 42.9085143022787, 140.762369576636 42.9085189232553, 140.762259148685 42.9071983608046, 140.762227360395 42.9063994806131, 140.762189711039 42.9059916339666, 140.762175816875 42.9059646566797, 140.762173456414 42.9059395183819, 140.762232569845 42.9059361378386, 140.762241017151 42.9059349820726, 140.76443073493 42.9058165454745, 140.764711712455 42.9084118821676)) ^^http://www.opengis.net/ont/geosparql#wktLiteral