The Land Cover Map for Northern Eurasia for the Year 2000. S.A.Bartalev, A.S.Belward, D.V.Erchov, A.S.Isaev, E.Bartholomé, V.Gond, P.Vogt, F.Achard, A.M.Zubkov, D.Mollicone, I.Yu Savin, S.Fritz, G.Repina, A.Hartley. GLC2000 database, European Commision Joint Research Centre, 2003. http://www-gem.jrc.it/glc2000.