メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.777287918186 43.2005368471262, 141.777735681125 43.200789621135, 141.777132286557 43.2014168550249, 141.776356819629 43.2021287520315, 141.77595433943 43.2019248964624, 141.775488385425 43.201693559541, 141.776144111246 43.2010332163037, 141.776840509939 43.2003134715449, 141.777287918186 43.2005368471262)) ^^http://www.opengis.net/ont/geosparql#wktLiteral