メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.37272645709 43.0054224184059, 144.37303191081 43.0059721292902, 144.371585145345 43.0064100552164, 144.371292750964 43.0058608717561, 144.37096823783 43.0053025785966, 144.372391775459 43.0048918863059, 144.372432191654 43.0048802354384, 144.37272645709 43.0054224184059)) ^^http://www.opengis.net/ont/geosparql#wktLiteral