メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.372818027104 43.7679858754609, 142.373110432476 43.768532454427, 142.373414576835 43.7690989219402, 142.371963794702 43.7695298801368, 142.371642428994 43.768962580966, 142.371330351594 43.7684116590668, 142.371027349667 43.7678767617368, 142.372511588179 43.7674483118494, 142.372818027104 43.7679858754609)) ^^http://www.opengis.net/ont/geosparql#wktLiteral