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Published on 7 November 2023

Sion - the 1831 baseline

The magnificent cultural and historic achievement of the Dufour map is due among other things to the fact that this work was created against the background of an as yet ununited nation. Dufour therefore had to rely on a major collaborative effort of experts from the individual cantons.

The base of Sion from 1831 and its transfer to the neighbouring triangulation points Mont d'Orge - Nax in 1831.

Federal Office of Topography swisstopo

Infodesk history
Seftigenstrasse 264
3084 Wabern