メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.339933967137 43.0304449629098, 141.341482671751 43.0305624837782, 141.341418097529 43.0311447274978, 141.341403825417 43.0312219077639, 141.341366730766 43.0315529394796, 141.341329100955 43.03188769386, 141.33980544524 43.0317854913918, 141.339326293865 43.0317533362997, 141.339357709071 43.0314830254376, 141.339373919263 43.0313138692282, 141.339413695564 43.0310615592167, 141.339496543405 43.030411733305, 141.339933967137 43.0304449629098)) ^^http://www.opengis.net/ont/geosparql#wktLiteral