Even Rouault <[email protected]> writes:

> oh.... so I was wrong and you've spotted the reason for what Greg
> notices. So this is (was) a GDAL 3.3 specific bug (3.2 is fine).
>
> GDAL should have passed HUGE_VAL when no explicit time is specified,
> which would be interpreted by PROJ as ignoring the time-dependent
> parts (or equivalently using the reference epoch of the
> transformation, which nullifies the effect of those time-dependent
> parts), but it incorrectly passes 0 currently
>
> With fix queued in https://github.com/OSGeo/gdal/pull/3738

I applied that patch to beta1 and reinstalled and now the output seems
correct.  Thanks for the quick analysis and fix.

Probably a proj issue, but it would seem that using an epoch of 0 (== 1
BCE?) is well outside the domain of validity of the transform velocity
models.  But it's hard to draw the line and not really a useful
exercise.

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