[gdal-dev] Nodata is None, but still has blanks?

[Even Rouault]

> It seems that using an environment setting is required. Attempts to 
> use -co and --config  “GDAL_TIFF_INTERNAL_MASK=NO” resulted in a 
> warning or error respectively:
>
--config GDAL_TIFF_INTERNAL_MASK NO
>
> /Warning 6: driver GTiff does not support creation option 
> GDAL_TIFF_INTERNAL_MASK/
>
> //
>
> /FAILURE: No target dataset specified./
>
> cheers,
>
> -Matt//
>
> *From:*Even Rouault <even.rouault at spatialys.com>
> *Sent:* January 18, 2022 4:21 AM
> *To:* Frank Warmerdam <warmerdam at pobox.com>; Matt.Wilkie 
> <Matt.Wilkie at yukon.ca>
> *Cc:* gdal dev <gdal-dev at lists.osgeo.org>
> *Subject:* Re: [gdal-dev] Nodata is None, but still has blanks?
>
> >  I find that if I do:
>
>     tiffcp sample-no-mask.tif,0 x0.tif
>
>     I get an "x0.tif" with just the jpeg image, and not the mask. 
>     That may be helpful for you (without uncompressing the jpeg image).
>
> tiffcp doesn't use the raw interface of libtiff, hence JPEG 
> decompression&recompression will occur.
>
> tiffsplit avoids that as it does use the raw interface:
>
> tiffsplit sample-no-mask.tif out
>
> will generate a outaaa.tif file with the original JPEG content (the 
> geotif tags will be lost however, and will have to be reinjected 
> https://github.com/OSGeo/gdal/blob/master/swig/python/gdal-utils/osgeo_utils/samples/gdalcopyproj.py 
> <https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%2f%2fgithub.com%2fOSGeo%2fgdal%2fblob%2fmaster%2fswig%2fpython%2fgdal%2dutils%2fosgeo%5futils%2fsamples%2fgdalcopyproj.py&umid=B38C0EF4-D5D9-7605-8E85-D961C3CFDB4A&auth=c132af8ee7c9d1278d61a701569070a095ce962e-99d2fc4ea472c846533a93775fde3b12fb6fdbbe> 
> for example)
>
> Even
>
> -- 
>
> http://www.spatialys.com  <https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=http%3a%2f%2fwww.spatialys.com&umid=B38C0EF4-D5D9-7605-8E85-D961C3CFDB4A&auth=c132af8ee7c9d1278d61a701569070a095ce962e-da8823f42eeaed576a737271c27f693b63c86c21>
> My software is free, but my time generally not.

-- 
http://www.spatialys.com
My software is free, but my time generally not.

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