メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.373878565242 43.0498559908129, 141.373633167719 43.0499973743416, 141.373189338833 43.0502816968145, 141.372597708497 43.0497728966368, 141.372180936896 43.0494099636547, 141.373354221875 43.0486821756441, 141.373540341364 43.0485752927941, 141.373962388081 43.0489382612566, 141.374533442189 43.049451116476, 141.374102959671 43.0497145153719, 141.373878565242 43.0498559908129)) ^^http://www.opengis.net/ont/geosparql#wktLiteral