メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.990080312939 43.5573327044683, 144.989954488194 43.5572660017778, 144.989148422451 43.5568388109926, 144.989074796894 43.5567973313926, 144.98971325231 43.5563135225836, 144.99057435213 43.5568796750394, 144.990080312939 43.5573327044683)) ^^http://www.opengis.net/ont/geosparql#wktLiteral