メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.985349159236 43.5537420370545, 144.984815156732 43.5533854054684, 144.984429409344 43.5531169527853, 144.985093138656 43.5525294076533, 144.985135727146 43.552556057993, 144.985589294365 43.5528403932391, 144.986107113733 43.5531727620785, 144.985349159236 43.5537420370545)) ^^http://www.opengis.net/ont/geosparql#wktLiteral