[PROJ] WGS84/NAD83 Original to {current} transforms

[mhw-at-yg]

> I can't log on that ftp server. It times out.
> How are those datasets different from the ones on
> https://webapp.geod.nrcan.gc.ca/geod/data-donnees/transformations.php ,
> like the BC_93_05.GSB ?

I'm pretty sure the GSB files are identical. The ftp site has different
packaging, more than just the files.

>> Look for Trx and NTv2 tools.
>
> PROJ doesn't support yet the epoch transformation method that
> Trx / NAD83(CSRS) v7.0 velocity grid can do

Ahh, good to know. Thanks.

Matt



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-Matt
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