メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.7750000 33.0791667, 129.7812500 33.0791667, 129.7812500 33.0833333, 129.7750000 33.0833333, 129.7750000 33.0791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral