メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.548278322396 43.2407898823502, 143.547578772556 43.2408214676528, 143.547564433015 43.2406536140367, 143.547479211756 43.2396983883338, 143.548187885875 43.2396668401039, 143.548265132802 43.2406265167784, 143.548278322396 43.2407898823502)) ^^http://www.opengis.net/ont/geosparql#wktLiteral