[Qgis-developer] Re: Error with Shaded Relief

[Andreas Plesch]

Hello Agus,

I personally did not test the DEM shader plugin on MS Windows sofar.
Taking the error at face value suggests that perhaps you ran out of
memory on Windows but that would need quite a large DEM (which would
be easy to generate). If the error occurs with a small DEM, you might
be best off investigating numpy bugs and performance on MS Windows
since the error occurs in a numpy function (or class). If the errors
occurs only with large DEMs on Windows that would not be too
surprising since Linux deals better with larger amounts of memory than
Windows in general.

my 2c worth, Andreas

On Mon, Oct 12, 2009 at 3:11 PM, Agustin Lobo <alobolistas at gmail.com> wrote:
> My previous post on the Raster based Terrain Analysis plugin
> was wrong, the error occurs with the DEM relief shader:
>
>> We find this error at running DEM relief shader
>> on Win (1.3.0 from the standalone version). The plugin works fine on linux
>> (ubuntu jaunty), so it seems the python version, which cannot
>> be changed in the win standalone version, right?
>> Agus
>>
>> An error has occured while executing Python code:
>>
>> Traceback (most recent call last):
>>   File "C:/Documents and
>> Settings/WIN-XP/.qgis//python/plugins\shadedrelief\ShadedReliefDialog.py",
>> line 82, in accept
>>     myEngine.run()
>>   File "C:/Documents and
>> Settings/WIN-XP/.qgis//python/plugins\shadedrelief\ShadedReliefEngine.py",
>> line 64, in run
>>     sta=numpy.dstack((-gr[1]*dy,gr[0]*dx,numpy.ones(gr[0].shape)*dx*dy))
>>   File "C:/Archivos de programa/Quantum GIS
>> Mimas/./python\numpy\lib\shape_base.py", line 304, in dstack
>>     return _nx.concatenate(map(atleast_3d,tup),2)
>> MemoryError
>>
>> Python version:
>> 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)]
>>
>
> Agus
>



-- 
Andreas Plesch
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Cambridge, MA 02138
Tel: 617-495-2356
Fax:617-495-7660