メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.597327214888 43.028734147364, 141.59781177501 43.0289851745844, 141.597825647927 43.0289923573133, 141.598080442342 43.0291244117818, 141.598626013205 43.0294037746287, 141.597868300691 43.030171280456, 141.597332449725 43.0299061760377, 141.596849326646 43.0304150125267, 141.595601803758 43.0297915159217, 141.594916577702 43.0294167468285, 141.595160235417 43.0291617110094, 141.596134278359 43.0281274234412, 141.597327214888 43.028734147364)) ^^http://www.opengis.net/ont/geosparql#wktLiteral