[PROJ] remote proj.db

[Even Rouault]

Javier,

no that's currently not possible, although it would certainly be 
possible to plug the SQLite I/O layer onto the PROJ network layer. That 
said, that would use curl underneath, and I don't think curl is really 
an option in a WASM context.  I'm not totally sure of the interest of 
not having proj.db embedded in the wasm itself, if it needs to be 
remotely fetched then. And PROJ's use of the database, when computing 
coordinate operations to transform from a CRS to another one, often 
involves reading a significant amount of the DB, so that could involve 
lots of small network requests, which might be less efficient than full 
ingestion of the DB.

Even

Le 06/08/2025 à 15:51, Javier Jimenez Shaw via PROJ a écrit :
> Hi
>
> I am working with Will on a wasm version of PROJ, trying to support 
> also remote grids (using emscripten_fetch).
> Do you know if there a way to specify the location of proj.db as a 
> remote URL? in that case, it would not be embedded in the wasm file 
> itself. (I am not sure if it does make sense).
>
> Cheers,
> Javier.
>
> _______________________________________________
> PROJ mailing list
> PROJ at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/proj

-- 
http://www.spatialys.com
My software is free, but my time generally not.