メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.750838339073 43.1955710211004, 141.750116689582 43.196318134758, 141.748939782159 43.1957173828489, 141.748792265164 43.1945677867223, 141.748812041357 43.1945414298534, 141.749861996269 43.1950827628458, 141.750805891344 43.1955540702694, 141.750838339073 43.1955710211004)) ^^http://www.opengis.net/ont/geosparql#wktLiteral