メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.0812500 34.8500000, 135.0875000 34.8500000, 135.0875000 34.8541667, 135.0812500 34.8541667, 135.0812500 34.8500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral