メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.967214074153 43.5377207352068, 144.966430518816 43.5371783660747, 144.966485207776 43.5371348745103, 144.967402534478 43.5364044583482, 144.968204479757 43.5369431133478, 144.967214074153 43.5377207352068)) ^^http://www.opengis.net/ont/geosparql#wktLiteral