メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.359159841523 43.759376877501, 142.358261628453 43.7602473622881, 142.356305626729 43.75893938472, 142.356761245884 43.7585509403627, 142.357605173378 43.7578999518591, 142.358097177136 43.7582272830836, 142.359557254011 43.759201837561, 142.359159841523 43.759376877501)) ^^http://www.opengis.net/ont/geosparql#wktLiteral