[Proj] What's wrong

[Tobias Heuchel]

Christian,

this :

http://lists.maptools.org/pipermail/proj/2001-September/000246.html

did helped me, when I had to do some transformations for french systems.

Good luck!

Tobias

> -----Ursprüngliche Nachricht-----
> Von: "PROJ.4 and general Projections Discussions" <proj at lists.maptools.org>
> Gesendet: 15.09.06 14:01:11
> An: proj at lists.maptools.org
> Betreff: [Proj] What's wrong


> First, sorry for my poor english.
> 
> I would like to use proj lib in a free french project.
> This project soon has possibilities of transformation coordinates but 
> restricting to French Ellipsoid, and I would like to offer larger 
> possibilities. So I'm trying to test proj4 to see if I can use it in this 
> project :
> I find first that the documentation is not very accesible (references to 
> documents that is nowhere, scripting conventions nowhere...etc) but there is 
> sources.
> I try to use cs2cs for converting coordinates but with no success :
> here is an example :
> 
> C:\Documents and Settings\PANEL>"C:\Documents and 
> Settings\PANEL\Bureau\projlib\
> cs2cs.exe" +proj=lcc +ellps=clrk80 +x_0=600000 +y_0=200000 +k_0=0.99987742 
> +lon_
> 0=2d20'14.025 +lat_0=46d48' +lat_1=45d53'56.108 +lat_2=47d41'45.652 +to 
> +proj=lc
> c +ellps=clrk80 +x_0=600000 +y_0=200000 +k_0=0.99987750 +lon_0=2d20'14.025 
> +lat_
> 0=44d06' +lat_1=43d11'57.44859 +lat_2=44d59'45.93773
> 822056 62249
> 822074.85       362098.46 0.000
> 822056.39 62249.52 504.1
> 822075.24       362098.98 504.100
> 
> this conversion is wrong  822056.39 62249.52 504.1 must become 822075.25 
> 362135.78 504.1
> I try with coma instead of decimal point : the result is wronger and 
> different and there is no error reporting.
> 
> What's wrong ?
> 
> thanks for any help.
> 
> 
> -- 
> ========================================
> Christian PANEL
> Le chipier
> 69420 TUPIN ET SEMONS
> email: ch.panel at free.fr
> ========================================
> 
> 
> 
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