[Proj] Swiss Grid Systems

Irwin Scollar al001 at uni-koeln.de
Sun Jul 12 03:29:19 EST 2009

Swiss Grid Systems

May I suggest that interested participants in this discussion thread open:


and on the documentation entry on the right click on Reference system 
CH as well as on the Transformation CH1903<->WGS84  for the official 
version dated 19.11.2008?

They are available in English, German and French.

For those requiring higher accuracy for non-GIS geodetic 
purposes,  browse through the superb pages of the Swisstopo site for 
the finest documentation I have seen anywhere.


The NTv2 grid data is available in the topic Transformation data and 
formulae CHENyx06 of March 2007. See for example

for much more.

Irwin Scollar

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