メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.753825870248 43.1740352766382, 141.754224890607 43.1742426521934, 141.754652739401 43.1744621772029, 141.755064087976 43.1746786042894, 141.75424060076 43.1755398729101, 141.753434267712 43.176409580205, 141.753036205917 43.1762128975359, 141.752615161315 43.1759948736652, 141.752188252336 43.1757894814057, 141.751798476295 43.175585233272, 141.751651755968 43.1755243915515, 141.752469692401 43.1746533405501, 141.75331571068 43.1737760771517, 141.753811179631 43.1740278283704, 141.753825870248 43.1740352766382)) ^^http://www.opengis.net/ont/geosparql#wktLiteral