Regarding filename case, this is a mess. Most of the files coming from the
source use upper cases for extension.
But some of them have .GSB uppercase in the HTML name, but once unzipped,
they use .gsb (but EPSG refers most of time as .GSB sometimes)
In other cases, the source use .GSB, but EPSG refers to .gsb
So... for consistency I ended up using .GSB for this batch (the ntv2_0.gsb
is historically due to old PROJ referin it to it)
Retrieved from https://webapp.geod.nrcan.gc.ca/geod/data-donnees/transformations.php?locale=en Subject to Open Government Licence - Canada (as ntv2_0.gsb we already ship)
Regarding filename case, this is a mess. Most of the files coming from the source use upper cases for extension. But some of them have .GSB uppercase in the HTML name, but once unzipped, they use .gsb (but EPSG refers most of time as .GSB sometimes) In other cases, the source use .GSB, but EPSG refers to .gsb So... for consistency I ended up using .GSB for this batch (the ntv2_0.gsb is historically due to old PROJ referin it to it)
Addresses https://github.com/OSGeo/PROJ/issues/202