Hi,
I have been looking at that. If I understand, that grid is for the nad27
to nad83 (original). Updated version of nad83(csrs96) known as nad83csrs
or nad83(csrs98) are not included. I think the trx software is the
only ways out for those. I and sending email to see if other grids exist
nationally. Will keep you posted.
BTW, I am not surprised by the fact that they helped you. These NRCAN
people really are great. I deal with them regularly and they are indeed
very helpful.
Nicolas
On Apr 1, 2016 11:21, "Donovan Cameron [via OSGeo.org] "
<[email protected]> wrote:
The NTv2 GSB[1] for Canada is shared under the "Open Government
License - Canada"[2]. I made a request some years ago and they did it! So
it's definitely a good step forward. I'm not a license guru so not sure
if it can be packaged and redistributed with FOSS (ie, QGIS or proj). I know
for provincial (cause I'm in British Columbia) the Provincial Government
has their own GSB for distribution, albeit a different and non-open license
(I've asked for it to be switched to open license as well). I tend to use
those, so asking with Provincial agencies/ministries would be a good bet too.
[1] http://open.canada.ca/data/en/dataset/b3534942-31ea-59cf-bcc3-f8dc4875081a
[2] http://open.canada.ca/en/open-government-licence-canada On Fri, Apr 1,
2016 at 4:49 AM, Andre Joost < [hidden email] > wrote: Am 01.04.2016 um
09:18 schrieb Neumann, Andreas:
Maybe it would also be more user friendly, if QGIS would already deliver
the grid shift files for most countries. But that would bloat QGIS quite
a bit. The grid shift file for Switzerland (one of the smallest
countries in the world) is already 3 MB. Maybe a grid shift file manager
and repository would help for downloading, installing and deleting the
files and for setting it up properly for easy usage.
Grid shift files are not always for free, and free ones might not be allowed to
be distributed by others (like on qgis.org ).
See
https://github.com/OSGeo/proj.4/wiki
https://github.com/OSGeo/proj.4/wiki/NonFreeGrids
http://downloads2.esri.com/support/TechArticles/Grid-based_Transformation_Methods_for_Canada3.pdf
for more details.
HTH,
André Joost
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