メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.984427565397 43.5536912878332, 144.984026494719 43.5534346630923, 144.984126107461 43.5533497948566, 144.983776812022 43.5531261751356, 144.984072551399 43.5528843387337, 144.984429409344 43.5531169527853, 144.984815156732 43.5533854054684, 144.984427565397 43.5536912878332)) ^^http://www.opengis.net/ont/geosparql#wktLiteral