Support for US datum transformations has been vastly improved in PROJ
9.2.0 with NADCON5 grid based transformations
Le 15/07/2024 à 17:46, David Klaus via gdal-dev a écrit :
Greg,
Thank you for that information. I will post my example code shortly.
Hopefully there is an obvious mistake in my code that is not related
to Proj4 or GDAL version,
On Mon, Jul 15, 2024 at 11:40 AM Greg Troxel <g...@lexort.com> wrote:
David Klaus <dkl...@carlsonsw.com> writes:
> As far as upgrading Proj4; because we build Proj4 statically in
our custom
> build, it's not a trivial task to upgrade versions. Also, I
think there
> might be compatibility reasons why we've stuck with 6.3.1 up
until now.
>
> But if NAD83 realization transformation functionality has been
expanded and
> improved in later versions, it might be worth it for us to
upgrade. I was
> wondering, judging by the contents of the proj-datumgrid
packages I've
> found online, it looks like Proj4 did not support any NAD83
realization
> transformations besides 1986->HARN before at least Proj4 7.0.
I maintain an unrelated (not geo) software package, and there my
practice is not to engage in debugging old versions. It takes a
lot of
time and in the cases the problem has been resolved already, it is
entirely not useful (to the project).
I am not saying NAD83 is better specifically if you udpate. I really
don't know.
--
David Klaus
Carlson Software
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