I read in https://proj.org/en/stable/specifications/geodetictiffgrids.html#general-description that files hosted on the CDN support Signed/Unsigned Int 16 and Int 32. Might this be expanded to include Int 8, given its support in GDAL>=3.7.0: https://gdal.org/en/stable/development/rfc/rfc87_signed_int8.html
I'm working with a PROJ auxiliary database that includes a lot of large transformation grids that scale to Int8 with sub-mm precision. On Sun, Apr 27, 2025 at 8:43 AM Even Rouault via PROJ <proj@lists.osgeo.org> wrote: > > Le 24/04/2025 à 21:51, Mike Taves via PROJ a écrit : > > There is Git Large File Storage (Git LFS), which has a limit of 2GB. > > Yes, but there are billing / bandwidth implications. I remember we had it > enabled, but CI cloning typically exhausted the allowed free bandwidth. > > Javier, maybe you can try using gdal_translate -scale X X X X -ot UInt16 > -co COMPRESS=DEFLATE -co TILED=YES -co PREDICTOR=2 with the appropriate > scaling values ? > > Or gdal_translate -co DISCARD_LSB=X -co COMPRESS=DEFLATE -co TILED=YES -co > PREDICTOR=3 to nullify least signifcant bits of the mantissa. > > > > On Fri, 25 Apr 2025, 04:37 Javier Jimenez Shaw via PROJ, < > proj@lists.osgeo.org> wrote: > >> Hi >> >> I am playing with the new American geoid model SGEOID2022 >> >> After compressing with this command (can I do it better?) >> gdal_translate sgeoid2022.tif sgcomp.tif -co COMPRESS=DEFLATE -co >> TILED=YES -co PREDICTOR=3 >> I get a 110 MB file (and it is only one band. No velocities). >> >> GitHub has a limit of 100MB: >> >> https://docs.github.com/en/repositories/working-with-files/managing-large-files/about-large-files-on-github >> >> Just to let you know. >> >> Cheers, >> Javier. >> _______________________________________________ >> PROJ mailing list >> PROJ@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/proj >> > > _______________________________________________ > PROJ mailing > listPROJ@lists.osgeo.orghttps://lists.osgeo.org/mailman/listinfo/proj > > -- http://www.spatialys.com > My software is free, but my time generally not. > > _______________________________________________ > PROJ mailing list > PROJ@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/proj >
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