メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.2187500 34.4500000, 133.2250000 34.4500000, 133.2250000 34.4541667, 133.2187500 34.4541667, 133.2187500 34.4500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral