This is a bit of an offhand comment without much thought, but perhaps TIFF group should focus only on describing the physical manifestation of the pixels, and the more "usage" oriented metadata is best left to other entities? That's a pretty rough comment, and I know there's a fair bit of history that contradicts that line of thought, but just putting it out there as a possible future guideline.
Kemp On Thu, May 12, 2022 at 6:16 PM Even Rouault <[email protected]> wrote: > > Le 12/05/2022 à 23:58, Simon (Vsevolod) Ilyushchenko a écrit : > > > > On Thu, May 12, 2022 at 2:50 PM Even Rouault <[email protected]> > wrote: > >> >> 3. Even: yes, I'm not quite sure whether this should be handled on GDAL >> or TIFF level. Other GDAL-readable format like netcdf-cf have time >> standards already, but yes, geotiffs (and lately COGs = cloud-optimized >> geotiffs <https://www.cogeo.org/>) are the lingua franca of our >> community. Setting GDAL fields START_DATE and END_DATE indeed feels like a >> good solution, so I wanted to find out how to do this properly in the hope >> of creating a standard. >> >> It could certainly be good to have a standard for such metadata items for >> TIFF that apply in the Earth Observation domain, and would be the >> equivalent of netcdf-cf conventions, or maybe porting fields from STAC ( >> https://stacspec.org/). Unfortunately the TIFF tag mechanism is hard to >> make evolve given that it implies a registry to attribute a code for a >> tag/key and an entity that takes care of doing that, which no longer >> happens those past years. Hence my suggestion to have that at the GDAL >> level. There's also the >> https://www.awaresystems.be/imaging/tiff/tifftags/geo_metadata.html tag >> used by the DGIWG community, to put XML ISO metadata in it, but that's >> going into complex metadata system. >> > > Alright - what's the next step in making these GDAL tags more official? > > That would probably be more a discussion for the gdal-dev mailing list, or > perhaps even the broader COG community. > > -- http://www.spatialys.com > My software is free, but my time generally not. > > _______________________________________________ > Tiff mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/tiff >
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