Hi I am warping a file to EPSG:3857 and later generating a COG with JPEG compression. The input tif file has also JPEG compression. (I learned that I need the - dstalpha to keep it transparent) I am doing it in Ubuntu 22.04 using conda.
First I tried this, using LZW as output of the warp GDAL_CACHEMAX=16GB GDAL_NUM_THREADS=ALL_CPUS gdalwarp -t_srs EPSG:3857 -ct "+proj=pipeline +step +inv +proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +step +proj=push +v_3 +step +proj=cart +ellps=airy +step +proj=helmert +x=446.448 +y=-125.157 +z=542.06 +rx=0.15 +ry=0.247 +rz=0.842 +s=-20.489 +convention=position_vector +step +inv +proj=cart +ellps=WGS84 +step +proj=pop +v_3 +step +proj=webmerc +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84" -co COMPRESS=LZW -co BIGTIFF=YES -co TILED=YES -dstalpha orthomosaic.tiff web_mercator.tif Creating output file that is 677881P x 303664L. Processing orthomosaic.tiff [1/1] : 0...10...20...30...40...50...60...70...80...90...100 - done in 00:27:04. then I try to generate the COG GDAL_CACHEMAX=16GB GDAL_NUM_THREADS=ALL_CPUS gdal_translate web_mercator.tif web_mercator_cog.tif -co COMPRESS=JPEG -co BIGTIFF=YES -of COG Input file size is 677881, 303664 0ERROR 1: LZWDecode:Not enough data at scanline 0 (short 40448 bytes) 0. - estimated remaining time: 00:14:34 and failed As it is an LZW problem, I tried with DEFLATE: GDAL_CACHEMAX=16GB GDAL_NUM_THREADS=ALL_CPUS gdalwarp -t_srs EPSG:3857 -ct "+proj=pipeline +step +inv +proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +step +proj=push +v_3 +step +proj=cart +ellps=airy +step +proj=helmert +x=446.448 +y=-125.157 +z=542.06 +rx=0.15 +ry=0.247 +rz=0.842 +s=-20.489 +convention=position_vector +step +inv +proj=cart +ellps=WGS84 +step +proj=pop +v_3 +step +proj=webmerc +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84" -co COMPRESS=DEFLATE -co BIGTIFF=YES -co TILED=YES -dstalpha orthomosaic.tiff web_mercator_d.tif Creating output file that is 677881P x 303664L. Processing orthomosaic.tiff [1/1] : 0...10...20...30...40...50...60...70...80...90...100 - done in 00:27:34. And then the same GDAL_CACHEMAX=16GB GDAL_NUM_THREADS=ALL_CPUS gdal_translate web_mercator_d.tif web_mercator_cog.tif -co COMPRESS=JPEG -co BIGTIFF=YES -of COG Input file size is 677881, 303664 0.. - estimated remaining time: 02:29:49ERROR 1: ZIPDecode:Decoding error at scanline 0 0...10... - estimated remaining time: 00:42:12 and failed :( Trying again I got this output at a similar point (but nothing about ZIPDecode:Decoding error at scanline 0). corrupted double-linked list Aborted (core dumped) What can it be? Is there any workaround? The file is big in pixels, but a big part is transparent. web_mercator_d.tif is "only" 14GB Thank you.
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