メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.356692633492 43.7864474828373, 142.35610613862 43.7868713233879, 142.355518130275 43.7873027391378, 142.355506200279 43.7872942764437, 142.353866407475 43.7861298990169, 142.354447412375 43.7856976546832, 142.35503599446 43.7852597552307, 142.356692633492 43.7864474828373)) ^^http://www.opengis.net/ont/geosparql#wktLiteral