メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.372547114047 43.7700114259368, 142.372278313882 43.7700909981088, 142.371963794702 43.7695298801368, 142.373414576835 43.7690989219402, 142.373735798108 43.7696761151207, 142.372547114047 43.7700114259368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral