メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.320154848096 43.0863765432389, 141.320503854569 43.0866923434657, 141.320780560832 43.0869479155855, 141.319998913793 43.0874110056646, 141.319510576198 43.087697702358, 141.3194009526 43.0876878083616, 141.319029599439 43.0876563729184, 141.318933863371 43.087648279405, 141.318656539397 43.0876996827502, 141.318746208114 43.0871519195298, 141.318883523667 43.0865434983811, 141.31908117075 43.0859743904558, 141.319793790277 43.0860457355573, 141.320154848096 43.0863765432389)) ^^http://www.opengis.net/ont/geosparql#wktLiteral