メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.917870539674 43.5228676471365, 141.917834125431 43.5232098850396, 141.917742260221 43.5236928598098, 141.917689293885 43.5238603972476, 141.917603429922 43.5241486586314, 141.917482681101 43.5244800692236, 141.917382313528 43.5247033777152, 141.917212242548 43.5249877738057, 141.91716233077 43.5250525392073, 141.916993968423 43.5251280729938, 141.916279367464 43.5227190052024, 141.916870378075 43.522958703436, 141.917870539674 43.5228676471365)) ^^http://www.opengis.net/ont/geosparql#wktLiteral