Hidden details in maps: lake depths
If you take a close look at Switzerland’s topographic maps, you will discover some exciting details – even beneath the water’s surface. The blue contour lines in lakes tell stories of hidden depths and sometimes of human interaction with nature too.

Map reading is in!
Federal Office of Topography swisstopo
Division Cartography
Seftigenstrasse 264
3084 Wabern
Seftigenstrasse 264
3084 Wabern