メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4750000 34.4791667, 133.4812500 34.4791667, 133.4812500 34.4833333, 133.4750000 34.4833333, 133.4750000 34.4791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral