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

[Matt.Wilkie at gov.yk.ca]

Hi Even,

Yeah, it's the same quest that had me wake up the Github issue.

It would be great to resolve the licensing question for the provincial grids, and help if I can. It won't help my particular situation of: no grids available at all. I was hoping (grasping at straws) that someone here would have an alternate idea.

The BC grid files are here ftp://ftp.gdbc.gov.bc.ca/sections/outgoing/gsr/NTv2.0/ but the license is definitely closed (Disclaimer.txt). It should be okay to have a script that displayed the disclaimer, downloaded, and stuffed the files in the right directory though as the restriction is on redistribution:

> No further distribution of NTv2 SOFTWARE, GRID SHIFT FILES and PROCEDURES, 
> in any form, either in whole or in part, is permitted.

I've also queried NRCAN Geodetic Services, a local survey and engineering company, and a few other people who've been publicly noisy about aspects of CSRS that seem to intersect my scenario. I'll report back on those conversations too.

Cheers,

Matt
Geomatics Analyst | Environment | T 867-667-8133 | Yukon.ca