メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355915579103 43.0582824016128, 141.355806894465 43.0587721024909, 141.355778764512 43.058853254491, 141.354194190112 43.058644353478, 141.354334896823 43.0580574281483, 141.354470773266 43.0574925480719, 141.35606949716 43.0577090805138, 141.355915579103 43.0582824016128)) ^^http://www.opengis.net/ont/geosparql#wktLiteral