メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.861686483135 43.3323631666752, 141.861580324774 43.3323801074526, 141.861194423256 43.332443784277, 141.861176073576 43.332446816093, 141.860804461001 43.3311127002954, 141.861179908181 43.3310593282594, 141.862480997256 43.3308628725268, 141.862581684464 43.3312273002992, 141.862842610467 43.3321810547418, 141.862422668877 43.3322386426219, 141.861686483135 43.3323631666752)) ^^http://www.opengis.net/ont/geosparql#wktLiteral