[gdal-dev] Problem calling gdalwarp from within python script

[Simon Richard Proud]

Ok, that gets things a little closer - now it gives an error: "ERROR 1: Translating source or target SRS failed"
I tried with '+proj=geos +lon_0=0.0 +h=35785831' as one argument and as three. Same result. 
I also tried including the -te and -tr arguments in the one argument along with the proj details - no luck with that either.

/Simon
________________________________________
Fra: Kurt Schwehr [schwehr at gmail.com]
Sendt: 19. januar 2014 18:05
Til: Simon Richard Proud
Cc: gdal-dev at lists.osgeo.org dev
Emne: Re: [gdal-dev] Problem calling gdalwarp from within python script

> ,"-r cubicspline",


becomes

"-r", "cubicspline",

and so forth

On Jan 19, 2014, at 3:00 PM, Simon Richard Proud <srp at geo.ku.dk> wrote:

> Hi, thanks for the reply.
>
> I tried changing the call to this:
> process.call(["gdalwarp","-q","-multi","-r cubicspline","-t_srs '+proj=geos +lon_0=0.0 +h=35785831'","-te -5568748.2758 -5568748.4774 5568748.2758 5568748.2758","-tr 3000.40316582 3000.40316582","-srcnodata 65535","TEST.tiff","TEST2.tiff"])
>
> But still receive just the usage instructions, I can't see any other arguments that can be divided into an element. Setting the "shell=True" option also has no effect.
>
> /Simon
>
> ________________________________________
> Fra: Kurt Schwehr [schwehr at gmail.com]
> Sendt: 19. januar 2014 17:47
> Til: Simon Richard Proud
> Cc: gdal-dev at lists.osgeo.org dev
> Emne: Re: [gdal-dev] Problem calling gdalwarp from within python script
>
> try
>
>> subprocess.call(["gdalwarp", "-q",  "-multi",   ...   "TEST2.tiff"])
>
>
> Each arg must be an element in the list.
>
> -kurt
>
> On Jan 19, 2014, at 2:27 PM, Simon Proud <srp at geo.ku.dk> wrote:
>
>> Hi,
>> I wish to call gdalwarp from within a python script but I cannot get it to
>> work.
>>
>> The command I wish to run is:
>>
>> gdalwarp -q -multi -r cubicspline -t_srs '+proj=geos +lon_0=0.0 +h=35785831'
>> -te -5568748.2758 -5568748.4774 5568748.2758 5568748.2758 -tr 3000.40316582
>> 3000.40316582 -srcnodata 65535 TEST.tiff TEST2.tiff
>>
>> I'm running on Ubuntu 12.04. The above command works perfectly when called
>> from a terminal window and produces a good output image.
>>
>> But when I run from python I get problems.
>> First, I tried to run with subprocess.call(["gdalwarp","-q -multi ...
>> TEST2.tiff"]) then all I see is the default usage instructions. No file is
>> created. Same if I use popen.
>>
>> If I use: os.system("gdalwarp -q -multi ... TEST2.tiff") then it does run
>> and I see the expected text on the screen. However, in this case the output
>> file is blank - it is the right size and contains the right georeferencing
>> information but every pixel in the image has a value of zero.
>>
>> Does anyone have an idea what could be the problem here?
>> Thanks!
>>
>>
>>
>> --
>> View this message in context: http://osgeo-org.1560.x6.nabble.com/Problem-calling-gdalwarp-from-within-python-script-tp5098902.html
>> Sent from the GDAL - Dev mailing list archive at Nabble.com.
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>
>