メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.36049243294 43.0867660709472, 141.360416805138 43.0871511628599, 141.360234938355 43.0878816535784, 141.358689747675 43.08767095211, 141.358878444738 43.0869469885126, 141.359045048645 43.0862112474726, 141.360583687981 43.0864148587672, 141.36049243294 43.0867660709472)) ^^http://www.opengis.net/ont/geosparql#wktLiteral