メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.785288112677 43.1660217109693, 140.781000416203 43.1681455558922, 140.78049323726 43.1676234669977, 140.779749318583 43.1660043113426, 140.778913750227 43.1652672916558, 140.777474770204 43.1642138316379, 140.780411178981 43.1619933613609, 140.782401219553 43.1636451037926, 140.785288112677 43.1660217109693)) ^^http://www.opengis.net/ont/geosparql#wktLiteral