メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5687500 34.0916667, 134.5750000 34.0916667, 134.5750000 34.0958334, 134.5687500 34.0958334, 134.5687500 34.0916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral