メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352751226438 43.1171819470371, 141.351223871415 43.1169956978929, 141.35131015103 43.1165655673739, 141.351382003503 43.1162484744413, 141.351469871545 43.1158604092109, 141.351877814421 43.11591506958, 141.353023752222 43.1160558629749, 141.352909543303 43.1164798705365, 141.352828111614 43.1168485069983, 141.352751226438 43.1171819470371)) ^^http://www.opengis.net/ont/geosparql#wktLiteral