メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347981948745 43.0639569722746, 141.346444632267 43.0637429217729, 141.346733912909 43.062554737825, 141.347509994868 43.0626646001971, 141.34828934763 43.0627740618218, 141.347981948745 43.0639569722746)) ^^http://www.opengis.net/ont/geosparql#wktLiteral