[PROJ] Call for review on RFC 4 text: Remote access to grids and GeoTIFF grids

[Even Rouault]

Jeff,

> I would like this RFC to include effort to improve the documentation on
> which grids should be installed (it is very confusing how
> 'proj-datumgrid-latest' differs from world, europe, oceania,
> northamerica, I always assume, like many others I bet, that -latest
> includes europe+oceania+northamerica+world). 

Can you point exactly in the documentation where would you want some 
clarification ?

> Which brings me to the most important point that I believe is missing in
> the RFC, of notifying the user when a grid file is not leveraged.
> Currently there is no warning, no notice, when a grid is not installed.
> I side with Andrew Bell on his point that during installation I'd like
> to see more messages, notices, or something to install all grid files.
> Could there be a build option of "TEST_ALL_DATUMGRID_FILES" during PROJ
> compilation?

Installation is a complicated topic. The PROJ project has no control over how 
PROJ is packaged and installed, and doing the "check at installation" means a 
different technical reality for Debian, Fedora, MS4W, OSGeo4W, conda, etc.
That said I took note of Chris Crook's idea about a script to help, as a post-
installation means (could potentially be run automatically by whatever 
installation process is done)
https://github.com/OSGeo/PROJ/issues/1750

Even

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