[PROJ] Is your the geoid model from your country in PROJ?

[Even Rouault]

I figured it out. The files_removed.geojson file at 
https://github.com/OSGeo/PROJ-data/blob/master/files_removed.geojson 
lacked a "version_removed" property, which caused the final 
files.geojson file used by projsync to also lack it. And without the 
information of the version where a file has been removed, projsync is 
conservative and tries to download it since it doesn't know if it might 
be useful or not.

I've fixed it in 
https://github.com/OSGeo/PROJ-data/commit/5e84d7936226f70442f1360077ffafbf1dea2f9a 
, also adding consistency checks so we properly fill metadata when 
removing a file

But the bottom line is that we can't just remove a file from the CDN 
without breaking projsync of older PROJ versions. We might remove it one 
day when we are reasonably confident that nobody longer used a PROJ 
version that uses a PROJ.data that is lower than the version where the 
file was removed. But that's more a 5+ years horizon to be on the safe side

Le 25/04/2024 à 21:15, Even Rouault via PROJ a écrit :
>
> I thought I was going to regret it: it broke "projsync --all", at 
> least in the context of build GDAL master docker images (it shouldn't 
> in theory, but in practice it does, and I don't have time to 
> investigate that at the moment).  So I've re-uploaded the file to the 
> CDN to the version it was at 
> https://github.com/OSGeo/PROJ-data/blob/0531fe9dbc818beb156df75eb5b3a8cac0278ef0/nl_nsgi/nl_nsgi_naptrans2018.tif
>
> Le 25/04/2024 à 17:14, Even Rouault via PROJ a écrit :
>>
>> I've just removed it from the CDN
>>
>> Le 23/04/2024 à 14:37, Even Rouault via PROJ a écrit :
>>>
>>> We use to keep old grids on the CDN even when they are removed in a 
>>> later version of PROJ-data. That way people things will still work 
>>> for people that use an older PROJ version
>>>
>>> Are we completely sure that nobody no longer use 
>>> nl_nsgi_naptrans2018.tif ?
>>>
>>> Le 23/04/2024 à 13:18, Lesparre, Jochem via PROJ a écrit :
>>>>
>>>> I noticed that CDN still contains the from VDatum (gtx) to GeoTIFF 
>>>> (tif) converted geoid grid 
>>>> https://cdn.proj.org/nl_nsgi_naptrans2018.tif for the Netherlands, 
>>>> although it isn’t listed in https://cdn.proj.org/nl_nsgi_README.txt 
>>>>  I thought I removed that grid from PROJ when I corrected the 
>>>> metadata of the other GeoTIFF grids for the Netherlands, but 
>>>> apparently I missed something. It doesn’t make sense to distribute 
>>>> that grid as GeoTIFF, because it is only usable for PROJ versions 
>>>> that did not yet support GeoTIFF.
>>>>
>>>> Can someone help to get the GeoTIFF version removed completely?
>>>>
>>>> Jochem
>>>>
>>>>
>>>>
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> -- 
> http://www.spatialys.com
> My software is free, but my time generally not.
>
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-- 
http://www.spatialys.com
My software is free, but my time generally not.
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