メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.0375000 35.4541667, 140.0437500 35.4541667, 140.0437500 35.4583333, 140.0375000 35.4583333, 140.0375000 35.4541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral