Siegfriedkarte, 1889 (original scale 1:50'000, grid width 2km). Blue contours: snow and ice. Light orange overlay: extent of glacier in 1970; darker orange: 2003. |
Siegfriedkarte, 1889 (original scale 1:50'000, grid width 2km). Blue contours: snow and ice. Light orange overlay: extent of glacier in 1970; darker orange: 2003. |