メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.0812500 34.8916667, 132.0875000 34.8916667, 132.0875000 34.8958334, 132.0812500 34.8958334, 132.0812500 34.8916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral