メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.405910876937 43.0103668965253, 144.405695671711 43.0105538040711, 144.402780346434 43.0086627554698, 144.403670837437 43.0079031923727, 144.404201195974 43.0074776412166, 144.407088346038 43.0093143295894, 144.407165430461 43.0093592229006, 144.405910876937 43.0103668965253)) ^^http://www.opengis.net/ont/geosparql#wktLiteral