[PROJ] QGIS seems to transform with height 0 instead of the actual height

[Greg Troxel]

"Lesparre, Jochem via PROJ" <proj at lists.osgeo.org> writes:

>> I have the impression that you are asking at the wrong mailing list
>> ;) (but I am not in QGIS one, maybe you asked there as well)
>
> As it is a very coordinate transformation related issue, I thought it
> would be good to first ask it here, also to check if my analysis is
> correct.

My understanding is that qgis basically uses proj, but that it extracts
the transformations and makes them available as choices at times.  I
particularly see this with the group of NAD83 realizations, and one
needs to be careful to reject incorrect ballpark transforms.  But it may
be picking them without telling you.

Having a transform result with just proj from one code (presumably, the
one that the data set is tagged with) to another (presumably project
CRS, or output data set tag if copying features) is of course a great
start and I think that's entirely appropriate to send to qgis-user.