メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.746073530318 43.1888036330791, 141.745631515758 43.1892693038221, 141.745217076045 43.189706117664, 141.744670702422 43.1902782236039, 141.743082556763 43.1894963340171, 141.743644514573 43.1889178336382, 141.744064691332 43.1884852699272, 141.744521815679 43.188035284855, 141.745882034705 43.1887088323975, 141.746073530318 43.1888036330791)) ^^http://www.opengis.net/ont/geosparql#wktLiteral