メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.36135365655 43.0705574986181, 141.360760723897 43.070477289146, 141.360781136341 43.0703327798122, 141.359791462938 43.07021804603, 141.359881605281 43.0698358018188, 141.360044885229 43.0692386370733, 141.361242043167 43.0694058992334, 141.361631490989 43.069460333032, 141.36135365655 43.0705574986181)) ^^http://www.opengis.net/ont/geosparql#wktLiteral