メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.0812500 43.1541667, 144.0875000 43.1541667, 144.0875000 43.1583333, 144.0812500 43.1583333, 144.0812500 43.1541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral