メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.754953346295 42.9013189613367, 140.754147974 42.9013603379289, 140.752645183323 42.9014293664537, 140.752561996123 42.9005218474023, 140.754068615775 42.9004516729227, 140.754896046799 42.9004114278273, 140.754953346295 42.9013189613367)) ^^http://www.opengis.net/ont/geosparql#wktLiteral