[PROJ] NOAA VDatum Tidal Grids and PROJ CDN

[Greg Troxel]

Howard Butler <howard at hobu.co> writes:

>> On Dec 16, 2020, at 8:44 AM, Greg Troxel <gdt at lexort.com> wrote:
>> 
>> 
>> Howard Butler <howard at hobu.co> writes:
>> 
>>> IMO, NOAA seeking to put 12gb of specialized shift files into the CDN
>>> is *exactly* what we were hoping to have happen with the CDN
>>> project. They're simply too big to deliver via normal package, but the
>>> convenience the CDN can provide for users of these grids is
>>> substantial. I hope NOAA can close the loop with EPSG and participate
>>> in the OGC standardization effort that is ongoing with respect to
>>> deformation grids and their format as well.
>> 
>> Thanks for explaining.  I really meant simply that I did not understand
>> and was thus being careful not to opine if this was ok or not.
>
> OK for NOAA to do this or ok for the PROJ project to support it with
> its CDN? I don't know about the former either, but the past NOAA
> public transition path for this kind of data was to toss it into the
> ether in their own format and hope for implementation. I would hope
> supporting PROJ and modernizing their grid deliveries with Cloud
> Optimized GeoTIFF would be under their purview.

I meant ok for the proj project.  I would expect that NOAA would have
their own review processes to determine what's ok for them.  A 24x
increase in size is a big deal, but I'm glad to hear it's known to be
ok.

With US taxpayer hat on, I agree that publishing in open formats is in
the public interest.

> As for the CDN, we can put a lot of data up there before anyone is
> going to complain. The URL is purposefully the project's instead of an
> Amazon one to allow us to gracefully migrate in case AWS decides
> supporting us is no longer in their interest.

Thanks - that all sounds  great.
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