[#586] projection exception when changing projection

Problem fixed with development version Revision 2816.

Steffi: If you do not want to wait for a new packaged version, you could start a text editor and do the following changes yourself to the file "projdialog.py" on your windows machine and installation:

http://wald.intevation.org/plugins/scmsvn/viewcvs.php/trunk/thuban/Thuban/UI/projdialog.py?root=thuban&rev=2816&r1=2700&r2=2816

I can reproduce the problem, thanks to Didrik's instructions, he send me:

On Friday 25 January 2008 16:47, Didrik Pinte wrote:
> 1. launch thuban
> 2. Open session -> load Data/iceland_sample.thuban
> 3. Select political layer projection menu by right clicking on political
> layer
> 4. choose "Gauss-Krueger Zone 2 (Germany)" projection
> 5. click on button Try
>
> --> it should crash
>
> I've just seen that using "Geographic" projection did not crash. It
> seems the problem is related to text boxes (Latitude, longitude, etc.)
> that produce a unicode output.
>
> Can you reproduce it ?
>
> I can reproduce it with Debian 1.2.0-2 version, trunk version on Debian
> system, and Stefanie can do it on windows ;-)

Steffi: Thanks for confirming the version.
Didrik: How did you reproduce the problem?
Can you give me a step by step documention, preferable
with a dataset I can also get somewhere (e.g. the Data from Thuban itself or frida?)

Hello,

I'm already using this version.

Steffi

Ok, the problem is related to the parameters given to Projectionc.new_Projection.

Unicode values are not supported.

How do we solve this ? Is this SWIG related ? or Proj related ?

More details :

In debugging, i have found the following problem using the latest svn version :

TypeError: list must contain strings
File "/home/did/projets/python/thuban/current/thuban/thuban.py", line 36, in ?
Thuban.UI.main.main()
File "/home/did/projets/python/thuban/current/thuban/Thuban/UI/main.py", line 45, in main
app.MainLoop()
File "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", line 7720, in MainLoop
wx.PyApp.MainLoop(self)
File "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", line 7153, in MainLoop
return _core_.PyApp_MainLoop(*args, **kwargs)
File "/home/did/projets/python/thuban/current/thuban/Thuban/UI/projdialog.py", line 233, in OnApply
self.__SetProjection()
File "/home/did/projets/python/thuban/current/thuban/Thuban/UI/projdialog.py", line 555, in __SetProjection
self.receiver.SetProjection(self.__GetProjection())
File "/home/did/projets/python/thuban/current/thuban/Thuban/UI/projdialog.py", line 578, in __GetProjection
return Projection(parameters, self.projname.GetValue())
File "/home/did/projets/python/thuban/current/thuban/Thuban/Model/proj.py", line 78, in __init__
BaseProjection.__init__(self, params)
File "/home/did/projets/python/thuban/current/thuban/Thuban/../Lib/Projection.py", line 6, in __init__
self.this = Projectionc.new_Projection(*args)

The argument of the last call is the following :

>>> args
(['proj=tmerc', u'lat_0=0.0', u'lon_0=6.0', u'x_0=2500000', u'y_0=0', u'k=1.0', 'ellps=bessel'],)

with some unicode strings ...

Could this be the problem ?
>>>

I believe this problem has already be fixed in the development version.

Developers: Changelog entry from 2007-04-25 as the details.

Steffi: Can you try the development version thuban-1.2-svn20071002.exe.exe for windows
that you can download from the files section?

In any case: please add the information from the "Help-about" dialog to the report.

Thanks!