メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.793834965458 43.1889855063687, 140.79384915514 43.1893993565993, 140.793902962265 43.1893717692729, 140.794542997942 43.1899943723073, 140.793451507223 43.1904672852273, 140.79290741097 43.1898806398978, 140.792784601523 43.1897624012562, 140.79272453595 43.1896449620933, 140.792707325515 43.1895563397573, 140.792754038208 43.1892209785992, 140.792803944172 43.1889493749966, 140.792850492021 43.1887218949744, 140.792922498407 43.1883373451608, 140.793149364818 43.1871273596625, 140.793760746246 43.1870255060898, 140.793809895558 43.1879012934313, 140.793834965458 43.1889855063687)) ^^http://www.opengis.net/ont/geosparql#wktLiteral