メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0375000 34.3041667, 134.0437500 34.3041667, 134.0437500 34.3083333, 134.0375000 34.3083333, 134.0375000 34.3041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral