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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Tiffsplit works smoothly and easily. I appreciate adding it to my long term tool kit. For my current project it’s great as an exploration
and learning but as it turns out I found a more efficient route for my current project.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">The out.tif that split creates for the mask band is a 3 band RGB even though it looks like only the first band has any info in it.
That’s not really a problem except that cleaning it up later adds a step (in addition to re-applying the georeferencing). However I discovered that I actually
<i>can</i> use gdal_translate out of the box by using environment settings:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D;mso-fareast-language:EN-US">set GDAL_TIFF_INTERNAL_MASK=NO<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D;mso-fareast-language:EN-US">gdal_translate sample-internal-mask.tif out.tif<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">…will move the internal mask to an external file,
</span><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D;mso-fareast-language:EN-US">out.tif.msk</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">, that can then be manipulated
(a la Gimp recipe posted earlier) or discarded as needed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">It seems that using an environment setting is required. Attempts to use -co and --config “</span><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D;mso-fareast-language:EN-US">GDAL_TIFF_INTERNAL_MASK=NO”
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">resulted in a warning or error respectively:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Warning 6: driver GTiff does not support creation option GDAL_TIFF_INTERNAL_MASK<o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:36.0pt"><i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="text-indent:36.0pt"><i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">FAILURE: No target dataset specified.<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Matt</span><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></i></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Even Rouault <even.rouault@spatialys.com>
<br>
<b>Sent:</b> January 18, 2022 4:21 AM<br>
<b>To:</b> Frank Warmerdam <warmerdam@pobox.com>; Matt.Wilkie <Matt.Wilkie@yukon.ca><br>
<b>Cc:</b> gdal dev <gdal-dev@lists.osgeo.org><br>
<b>Subject:</b> Re: [gdal-dev] Nodata is None, but still has blanks?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt">> I find that if I do: <o:p>
</o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">tiffcp sample-no-mask.tif,0 x0.tif<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">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).<o:p></o:p></span></p>
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<p>tiffcp doesn't use the raw interface of libtiff, hence JPEG decompression&recompression will occur.<o:p></o:p></p>
<p>tiffsplit avoids that as it does use the raw interface:<o:p></o:p></p>
<p>tiffsplit sample-no-mask.tif out<o:p></o:p></p>
<p>will generate a outaaa.tif file with the original JPEG content (the geotif tags will be lost however, and will have to be reinjected
<a href="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">
https://github.com/OSGeo/gdal/blob/master/swig/python/gdal-utils/osgeo_utils/samples/gdalcopyproj.py</a> for example)<o:p></o:p></p>
<p>Even<o:p></o:p></p>
<p>-- <o:p></o:p></p>
<pre><a href="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">http://www.spatialys.com</a><o:p></o:p></pre>
<pre>My software is free, but my time generally not.<o:p></o:p></pre>
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