メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.045117194304 42.9116711369741, 143.045129536097 42.9116710514334, 143.04588030623 42.9117191573195, 143.04571295745 42.9128420442563, 143.044971084522 42.9127799506101, 143.044241212638 42.9127321163591, 143.043832672833 42.9127046308452, 143.043986522403 42.9115898566389, 143.044384247266 42.9116212849103, 143.045117194304 42.9116711369741)) ^^http://www.opengis.net/ont/geosparql#wktLiteral