Siegfried Map

• The Siegfried Map - a unique national treasure in digital form
• Historical maps as a guide for studying the changing landscapes and for historical research
• The Central Plateau, the Jura Mountains and southern Ticino at the scale 1:25 000, and the Alps at the scale 1:50 000
• Over 4000 maps with various dates of issue

Official name: Topographischer Atlas der Schweiz (TA)

Ellipsoid: Schmidt 1828

Projection: Flächentreue unechte Kegelprojektion

Point of origin for height measurements: Repère Pierre du Niton 376,86 m. ü. M. = 'alter Horizont'


The first official map series were originally published in 1870 at the same scale as the topographic surveys (1:25 000 and 1:50 000). However, Switzerland was divided in two parts: one published in 1:25 000 scale, the other in 1:50 000 scale, both partly overlapping: