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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Could you add a small image to show how the result looks like? I fear my imagination may be inaccurate.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>Lähettäjä:</b> gdal-dev <gdal-dev-bounces@lists.osgeo.org>
<b>Puolesta </b>andy via gdal-dev<br>
<b>Lähetetty:</b> maanantai 22. tammikuuta 2024 18.54<br>
<b>Vastaanottaja:</b> gdal dev <gdal-dev@lists.osgeo.org><br>
<b>Aihe:</b> [gdal-dev] Non able to manage properly vitual file, warping and black edges<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal">I have four tif input files, these have 3 bands RGB and are JPEG compressed.<o:p></o:p></p>
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<p class="MsoNormal">No null data set.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">My goal is to mosaic these and then warp the mosaic.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I start it with:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">gdalbuildvrt mosaic.vrt file1.tif file2.tif file3.tif file4.tif<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Then I warp the mosaic:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">gdalwarp -dstalpha -of vrt -overwrite -s_srs EPSG:32632 -t_srs EPSG:7791 mosaic.vrt warped.vrt<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Then I run<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">gdal_translate -b 1 -b 2 -b 3 -b 4 -co BIGTIFF=YES -co COMPRESS=DEFLATE -co ALPHA=YES -co TILED=YES -co NUM_THREADS=ALL_CPUS warped.vrt output.tif<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The final tiff file has black edges.<o:p></o:p></p>
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<p class="MsoNormal">What's wrong with my procedure? How to avoid this?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="gmailsignatureprefix">-- </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">___________________</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Andrea Borruso<br>
website: <a href="https://medium.com/tantotanto" target="_blank">https://medium.com/tantotanto</a><br>
38° 7' 48" N, 13° 21' 9" E, EPSG:4326<br>
<span style="font-size:12.0pt">___________________</span><br>
<br>
"cercare e saper riconoscere chi e cosa,<br>
in mezzo all’inferno, non è inferno, <br>
e farlo durare, e dargli spazio"<br>
<br>
Italo Calvino<o:p></o:p></p>
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