メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.336319184946 43.0654125214749, 141.336165361826 43.066016897586, 141.334609198666 43.0658115342885, 141.334759787682 43.0652192308067, 141.334910136969 43.0646427490852, 141.335671552736 43.0647395661164, 141.336466092452 43.0648407928199, 141.336319184946 43.0654125214749)) ^^http://www.opengis.net/ont/geosparql#wktLiteral