メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.989074796894 43.5567973313926, 144.988666334296 43.5565875550779, 144.988506908654 43.5565048150999, 144.988479211276 43.5564910292859, 144.988254048949 43.5563786781547, 144.988899397697 43.5557782269869, 144.98971325231 43.5563135225836, 144.989074796894 43.5567973313926)) ^^http://www.opengis.net/ont/geosparql#wktLiteral