メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.368619662697 43.0775036367694, 141.369125483443 43.0775822889939, 141.368844011226 43.0786975780786, 141.368481084176 43.0786492815003, 141.36814608117 43.0786005660157, 141.367964267237 43.0785741279936, 141.368123611594 43.0774394743849, 141.368619662697 43.0775036367694)) ^^http://www.opengis.net/ont/geosparql#wktLiteral