メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.71126232702 44.371515466454, 141.710784965363 44.3718373171734, 141.709681887619 44.3709692827667, 141.71070453128 44.3703100879441, 141.711800558284 44.3711668289231, 141.71126232702 44.371515466454)) ^^http://www.opengis.net/ont/geosparql#wktLiteral