メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.407668015347 43.0599033337242, 141.40808278294 43.0602721715742, 141.407624490789 43.0605614446951, 141.406920611133 43.060966005812, 141.406748213883 43.0604364167392, 141.406609754589 43.0600691878039, 141.406372284252 43.0594099917764, 141.406353054026 43.0593574542433, 141.406784457184 43.0590985120389, 141.407275910104 43.0588034394478, 141.408148945792 43.0596204870021, 141.407668015347 43.0599033337242)) ^^http://www.opengis.net/ont/geosparql#wktLiteral