メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.722254866219 35.3597892450845, 136.719157796442 35.3599159110123, 136.718998706303 35.3578243186043, 136.7221346569 35.3576785227094, 136.722209011037 35.3587492523931, 136.722254866219 35.3597892450845)) ^^http://www.opengis.net/ont/geosparql#wktLiteral