[PROJ] NOAA VDatum Tidal Grids and PROJ CDN

[Even Rouault]

> @ Greg - Our Chief Geodesist has been significantly involved with the
> ISO Geodetic Registry and I believe he has included all of the datum and
> transformation parameters and grids from NGS into the registry.  While
> EPSG is certainly the de facto standard I believe the desire is to have
> this registry be the official location for parameters sometime in the
> future.

>From our free software developer & user perspective, the ISO geodetic registry 
is no better than EPSG due to using quite similar terms of use than the EPSG 
one: https://geodetic.isotc211.org/terms
A true (and non custom!) open data license would make it a much more appealing 
alternative.

Even

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