[GRASS-dev] Re: [GRASS GIS] #35: Verify and uncomment Swiss datum parameters

[Massimiliano Cannata]

Paul,
I just want to point you on the official Swiss geodetical office. If you 
have already discussed on it, never mind of my link.
Last, this 
(http://crs.bkg.bund.de/crseu/crs/eu-countrysel.php?country=CH#StartCE) 
confirms your thoughts as far as I can see.

Just my 2 cent, if it is not useful just ignore...

Maxi

Paul Kelly wrote:
> On Sun, 12 Jul 2009, Massimiliano Cannata wrote:
>
>> maybe this can help (CH1903 to WGS84):
>> http://www.swisstopo.admin.ch/internet/swisstopo/en/home/products/software/products/skripts.html 
>>
>
> Not sure which problem you mean it can help with? As far as I can see 
> that is a quick approximation to convert WGS84 lat-long co-ordinates 
> to Swiss projected co-ordinates, doing the datum transformation and 
> projection all in one step via an approximated method. There are some 
> more useful pages on the Swisstopo site though - we've had a little 
> discussion about it on the PROJ.4 list over the past few days.
>
> Paul
>


-- 

Dr. Eng. Massimiliano Cannata
Responsabile Area Geomatica
Istituto Scienze della Terra
Scuola Universitaria Professionale della Svizzera Italiana
Via Trevano, c.p. 72
CH-6952 Canobbio-Lugano
Tel: +41 (0)58 666 62 14
Fax +41 (0)58 666 62 09