https://www.mail-archive.com/gdal-dev@lists.osgeo.org/msg36305.html :)
On Tue, Jul 13, 2021 at 2:53 PM Javier Jimenez Shaw <j...@jimenezshaw.com> wrote: > > Thanks Thomas and Even. > > Thomas, about using cogger (that would be great), I forgot to mention that I > am doing it from a C++ library. Is there already a C/C++ API? > > Cheers, > Javier > .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__ > Entre dos pensamientos racionales > hay infinitos pensamientos irracionales. > > > > On Tue, 13 Jul 2021 at 14:15, thomas bonfort <thomas.bonf...@gmail.com> wrote: >> >> Javier, >> You can use https://github.com/airbusgeo/cogger#advanced to do that, >> provided that you have an internally tiled geotiff. >> >> -- >> thomas >> >> On Tue, Jul 13, 2021 at 2:04 PM Even Rouault <even.roua...@spatialys.com> >> wrote: >> > >> > Javier, >> > >> > You can use the "NONE" resampling method in BuildOverviews() or gdaladdo >> > to create the overviews IFD without allocating any storage, and then you >> > can open the file in update mode to set whatever values you want. >> > APPEND_SUBDATASET=YES will not set the appropriate value for the >> > SubFileType TIFF tag, and thus such pages won't be recognized as overviews >> > >> > Even >> > >> > Le 13/07/2021 à 13:57, Javier Jimenez Shaw a écrit : >> > >> > Hi >> > >> > I am computing the overviews of a GeoTIFF on my own (using the GPU, much >> > faster), and I want to include them in the tif file (also in the ovr >> > sidecar file). >> > What is the best way to do it? Just creating a multipage TIFF (I guess >> > with the option APPEND_SUBDATASET=YES)? Is there anything else needed >> > (metadata, tiff tags, etc)? >> > >> > So far I want to do it in RGBA 8 bit images. (In the future I want to do >> > it also in float32 images with nodata value and any number of bands, but >> > no hurry). >> > >> > I am using GDAL 3.3.1 >> > >> > Any help is welcome. >> > >> > Thanks. >> > Javier. >> > .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__ >> > Entre dos pensamientos racionales >> > hay infinitos pensamientos irracionales. >> > >> > >> > _______________________________________________ >> > gdal-dev mailing list >> > gdal-dev@lists.osgeo.org >> > https://lists.osgeo.org/mailman/listinfo/gdal-dev >> > >> > -- >> > http://www.spatialys.com >> > My software is free, but my time generally not. >> > >> > _______________________________________________ >> > gdal-dev mailing list >> > gdal-dev@lists.osgeo.org >> > https://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
