メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.354643512736 43.766900178362, 142.354962772183 43.7674679860909, 142.354946817608 43.7674725896912, 142.353429611848 43.7679119852507, 142.353117465895 43.7673462233443, 142.352804797873 43.7667852071882, 142.352913354219 43.7667440407138, 142.354338903505 43.7663354317088, 142.354643512736 43.766900178362)) ^^http://www.opengis.net/ont/geosparql#wktLiteral