メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.996275434028 43.5604335992989, 144.995882558593 43.5607420738617, 144.995842665427 43.5606940910309, 144.995517803366 43.5603292120529, 144.995744122361 43.5601346145569, 144.995799763795 43.5600866206423, 144.996224070739 43.560388529682, 144.996275434028 43.5604335992989)) ^^http://www.opengis.net/ont/geosparql#wktLiteral