[PROJ] PROJ grid files CDN

[Nyall Dawson]

On Sat, 14 Sep 2019 at 00:03, Howard Butler <howard at hobu.co> wrote:

> Does the PROJ community support such an idea? How does management of grid shift data impact your ability to use PROJ, and what ideas do you have to help us improve it?  If the feedback on this proposal is generally positive, I will work with Even on writing an RFC of a proposed implementation.

Bit late to this thread, sorry. While I think the proposal will be
very useful in some circumstances, it's not a fix-all and it's still
going to be very important for client applications to warn their users
whenever a grid is desirable but not available and provide some
user-friendly method to do this.

I'm thinking specifically of offline users here, or those with
unreliable/expensive internet connections. For these users it's
critical that they are alerted about missing grids instead of just
silently falling back to an inferior operation.

And we should also consider releasing all-in-one packages of end user
applications which include ALL the datum grid packages, so that users
who require an offline installer will be guaranteed to have these
available... (again, thinking of someone who goes out to the field in
a remote location without regular internet connections).

Nyall