メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.290518304992 43.0712115586399, 141.290698565337 43.0713586502481, 141.290896717725 43.071527202207, 141.290417464697 43.0717905059678, 141.28997200722 43.0720272253489, 141.289518065823 43.0722724527201, 141.289052361657 43.0725212362945, 141.287951723339 43.0716021420068, 141.2884624783 43.0713248364815, 141.288820625998 43.0711259296509, 141.288834654779 43.071118311033, 141.289308256273 43.0708607331554, 141.289775866995 43.0706056354556, 141.290518304992 43.0712115586399)) ^^http://www.opengis.net/ont/geosparql#wktLiteral