1930 - 1959

1930: Use of aerial images

Productive use of aerial images for map production.

1931: Introduction of photo-engraving process

Definitive introduction of etching process (photo-engraving) on copper (e.g. for reproduction of map lettering). 

1934: Memorandum calling for the production of new national maps

Memorandum signed by numerous scientific bodies and the Swiss Alpine Club calling for the production of new national maps and bearing the stamp of cartography professor Eduard Imhof. 

1935: Federal legislation on production of new national maps

Parliament adopts federal legislation dated 21 June 1935 governing the production of new national maps. Complete range of scales to be produced, but due to the political situation only the 1:50,000 map to be processed initially.

1938: Publication of first sheet of new 1:50,000 national map

Publication of first sheet of the 1:50,000 national map (no. 263, Wildstrubel).

1952: New negative scribing process

Initiation of development of new negative scribing (engraving on glass) process. Method subsequently licensed worldwide. 

1952: Publication of first sheet of 1:25,000 national map

Publication of first sheet of 1:25,000 national map (no. 1125, Chasseral).

1952: Printing of "Siegfried Map" discontinued

Discontinuation of printing of Siegfried Map.

1953: Copperplate engraving replaced by negative scribing

Negative scribing replaces copperplate engraving as method for original production.

1954: Col du Pillon - first sheet of national map

Publication of first sheet of 1:100,000 national map (no. 41, Col du Pillon).


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3084 Wabern
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Federal Office of Topography swisstopo

Seftigenstrasse 264
P.O. Box
3084 Wabern

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