メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.0187500 33.0375000, 133.0250000 33.0375000, 133.0250000 33.0416667, 133.0187500 33.0416667, 133.0187500 33.0375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral