[Proj] What's wrong
ch.panel at free.fr
Fri Sep 15 07:46:23 EDT 2006
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
I find first that the documentation is not very accesible (references to
documents that is nowhere, scripting conventions nowhere...etc) but there is
I try to use cs2cs for converting coordinates but with no success :
here is an example :
C:\Documents and Settings\PANEL>"C:\Documents and
cs2cs.exe" +proj=lcc +ellps=clrk80 +x_0=600000 +y_0=200000 +k_0=0.99987742
0=2d20'14.025 +lat_0=46d48' +lat_1=45d53'56.108 +lat_2=47d41'45.652 +to
c +ellps=clrk80 +x_0=600000 +y_0=200000 +k_0=0.99987750 +lon_0=2d20'14.025
0=44d06' +lat_1=43d11'57.44859 +lat_2=44d59'45.93773
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
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.
69420 TUPIN ET SEMONS
email: ch.panel at free.fr
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