Topographic Atlas of Switzerland - Siegfried Map (swisstopo)
The Topographic Atlas of Switzerland was published between 1870 and 1926, initially under the direction of Colonel Hermann Siegfried.
It was the first detailed overall map of Switzerland, at a scale of 1:25,000 for the Central Plateau, the Jura, and southern Ticino, and at a scale of 1:50,000 for the Alps. In total, taking into account the periodic updates carried out until 1949, more than 4,000 revised sheets were published. Two different techniques were used for the initial production: copper engraving for the 462 sheets at 1:25,000 and lithography for the 142 sheets at 1:50,000. With the historical data visualization tool – called “Journey through Time” – all editions of the map can be viewed interactively, also with the layer “Division Siegfried Map 25/50 Raster”.
Further information: Siegfried Map
Link to the map: map.geo.admin.ch