メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.366665945733 43.730886919694, 142.365895774038 43.730664382676, 142.365635789055 43.7305892621231, 142.366010206946 43.7299306647506, 142.366354907237 43.7293220425834, 142.36740435795 43.7296266193854, 142.367052638086 43.730224088242, 142.366665945733 43.730886919694)) ^^http://www.opengis.net/ont/geosparql#wktLiteral