メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.380475126779 43.0477831032779, 141.380913753121 43.0481473515825, 141.380592311228 43.048358433747, 141.38026213666 43.0485494042156, 141.38009133051 43.0484013273332, 141.37976301418 43.0481199214513, 141.379480688191 43.0478779305479, 141.379839872519 43.0476562375354, 141.380120141204 43.0474883093307, 141.380475126779 43.0477831032779)) ^^http://www.opengis.net/ont/geosparql#wktLiteral