メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0375000 34.7333333, 134.0437500 34.7333333, 134.0437500 34.7375000, 134.0375000 34.7375000, 134.0375000 34.7333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral