メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.777474770204 43.1642138316379, 140.775137680153 43.1626204050431, 140.775292668416 43.1623717550862, 140.775657411397 43.1619459085134, 140.777159382718 43.160557994144, 140.777949258275 43.1599617224399, 140.780411178981 43.1619933613609, 140.777474770204 43.1642138316379)) ^^http://www.opengis.net/ont/geosparql#wktLiteral