メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.0187500 34.0875000, 132.0250000 34.0875000, 132.0250000 34.0916667, 132.0187500 34.0916667, 132.0187500 34.0875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral