メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351281502921 43.0765322821529, 141.35132620981 43.0763415996993, 141.352953571671 43.07656164224, 141.352887668449 43.0766991813509, 141.352682708452 43.077109070537, 141.352416983996 43.0776655378651, 141.351051435594 43.0774902378777, 141.351191559149 43.0769159050443, 141.351243011458 43.0766964561755, 141.351281502921 43.0765322821529)) ^^http://www.opengis.net/ont/geosparql#wktLiteral