[Gdal-dev] Re: [GRASS5] export RGB channels in one ERDAS/IMG file

[Frank Warmerdam]

Otto Dassau wrote:
> gdal_merge.py -v -of HFA -o 1.img -separate 1r.img
> 
> Filename: 1r.img
> File Size: 31476x31818x1
> Pixel Size: 0.320000 x -0.320000
> UL:(3367943.360000,5941153.600000)   LR:(3378015.680000,5930971.840000)
> Copy 0,0,31476,31818 to 0,0,31476,31818.
> 
> ERROR 1: TIFFWriteEncodedStrip:1.img: File not open for writing
> ERROR 1: TIFFWriteEncodedStrip:1.img: File not open for writing

Otto,

Sorry, I can't think of any explanation for what is happening.  I don't
get the same result in my attempts to reproduce the problem.  You might want
to verify that format is being used.  Perhaps by adding a print after the
driver is fetched:

     Driver = gdal.GetDriverByName(format)
     print 'using %s format driver for output.' % format

But I see no reason your -of option shouldn't be working unless you are
using an old version of gdal_merge.py where the option was -f instead of -of.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent