[gdal-dev] GDAL 3.7.0 Proj 6.3.1 strange behavior when performing NAD83(EPSG:4152) to NAD83 HARN(EPSG:4269) realization transformation

[Greg Troxel]

David Klaus <dklaus at carlsonsw.com> writes:

> Thank you for the input. You don't happen to know where I can find
> documentation on these NADCON5 related changes?

I would suggest reading the 9.2.0 release notes.
There is a link to a merged PR which has further discussion.

The tl;dr; is that proj matches NGS tools.  Which is a pretty stunning
result.