Hi, I think it is not bad luck but something weird in GDAL 3.3. I tried again with version 3.3.1 from OSGeo4W and just like you I got also less pixels into output:
gdalwarp -t_srs epsg:4326 "Caribbean 2 VFR Chart.tif" caribbean_4326_2.tif Copying color table from Caribbean 2 VFR Chart.tif to new file. Creating output file that is 18714P x 10830L. But this warped image is not at all the same than the one produced with GDAL 3.4. The image lacks all the legends etc. but not only those. I wonder is the TIFF file has been written in some special way on several pages or something. -Jukka Rahkonen- Lähettäjä: gdal-dev <gdal-dev-boun...@lists.osgeo.org> Puolesta Carl Godkin Lähetetty: perjantai 5. marraskuuta 2021 17.36 Vastaanottaja: gdal-dev@lists.osgeo.org Aihe: Re: [gdal-dev] GeoTIFF gdalwarp puzzle ...And it works fine for me in 3.4.0 as well. Guess I just got unlucky with the GDAL 3.3.x series! Thanks, carl On Fri, Nov 5, 2021 at 8:09 AM Carl Godkin <cgod...@gmail.com<mailto:cgod...@gmail.com>> wrote: Partially answering myself: I just tried again with GDAL 2.4.4 (2020/01/08) that I have on my system as part of MS4W and it works! I have a way forward now. I'm still going to build GDAL 3.4.0 and try it there. Thanks a lot, carl On Fri, Nov 5, 2021 at 8:02 AM Carl Godkin <cgod...@gmail.com<mailto:cgod...@gmail.com>> wrote: Thanks for checking, Jukka. I am using GDAL 3.3.3 and get a smaller range: d:\gdal-3.3.3\bin64\gdalwarp.exe -t_srs epsg:4326 "Caribbean 2 VFR Chart.tif" caribbean_4326.tif Copying color table from Caribbean 2 VFR Chart.tif to new file. Creating output file that is 18714P x 10830L. Processing Caribbean 2 VFR Chart.tif [1/1] : 0...10...20...30...40...50...60...70...80...90...100 - done. Is there a bug fix between 3.3.3 and 3.4.0 that could account for this? Meanwhile, I'll try to get GDAL 3.4.0 going here. Thanks, carl On Fri, Nov 5, 2021 at 7:51 AM Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi<mailto:jukka.rahko...@maanmittauslaitos.fi>> wrote: Hi, Works for me on Windows with GDAL 3.4.0dev and Oct 07 2021 version of the file. gdalwarp -t_srs epsg:4326 "Caribbean 2 VFR Chart.tif" caribbean_4326.tif Copying color table from Caribbean 2 VFR Chart.tif to new file. Creating output file that is 18583P x 12118L. Processing Caribbean 2 VFR Chart.tif [1/1] : 0...10...20...30...40...50...60...70...80...90...100 - done. The map in caribbean_4326.tif is complete. -Jukka Rahkonen- Lähettäjä: gdal-dev <gdal-dev-boun...@lists.osgeo.org<mailto:gdal-dev-boun...@lists.osgeo.org>> Puolesta Carl Godkin Lähetetty: perjantai 5. marraskuuta 2021 16.25 Vastaanottaja: gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org> Aihe: [gdal-dev] GeoTIFF gdalwarp puzzle Hi, I'm working with some aviation charts and found one that behaves in a puzzling manner. This page https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/vfr/ has two Caribbean VFR charts in GeoTIFF format. I have been trying to run gdalwarp on "Caribbean 2 VFR Chart.tif" but I only ever get a small area out of the map instead of the whole extent. Specifically this command gives me just a smaller area output GeoTIFF: gdalwarp -t_srs EPSG:4326 "Caribbean 2 VFR Chart.tif" out.tif --debug ON I don't see anything from the debug output that explains this. The other chart, "Caribbean 1 VFR Chart.tif," does not behave this way, though the debug output from the same gdalwarp operation is much longer. I can't see anything wrong. I dragged both files into ArcGIS desktop explorer and both are displayed in the proper location and in their entirety. (I actually have a more elaborate workflow that works fine with chart #1 but this is the simplest operation I can think of that shows the problem with chart #2.) Thank you very much, carl
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