メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.327500566493 43.0496318298274, 141.32680850624 43.0495407967472, 141.326128029701 43.0494384599269, 141.32607760199 43.0494311606191, 141.326286471837 43.0488240053572, 141.326707176606 43.0489061703729, 141.327230589707 43.0490200370937, 141.327636923814 43.0491079198415, 141.327500566493 43.0496318298274)) ^^http://www.opengis.net/ont/geosparql#wktLiteral