メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.96958232379 43.5482973620545, 144.970042395699 43.5485997118183, 144.969292817257 43.5491509920815, 144.96888051317 43.5488875477626, 144.968478302038 43.54862055759, 144.969209003558 43.5480407603037, 144.969231750682 43.5480564274381, 144.96958232379 43.5482973620545)) ^^http://www.opengis.net/ont/geosparql#wktLiteral