[PROJ] Vertical conversions for Austria

[Andrew Kirmse]

I have some Lidar-derived lat/lng/elevation points in Austria in EPSG:9274
<https://epsg.io/9274> that I want to convert to EPSG:5778
<https://epsg.io/5778>.  I gather this is done by applying the offsets from
a particular model called the "Höhengrid", which I found at
https://cdn.proj.org/.  These points are locations and heights of
mountains, and I want to convert them to EPSG:5778 because that's what's
used on the BEV Austrian topographic maps.

I get this error when I try to do the conversion:

echo 46.642970 12.792060 2513.98 | cs2cs +init=epsg:9274 +to +init=epsg:5778
DeprecationWarning: PROJ_LIB environment variable is deprecated, and will
be removed in a future release. You are encouraged to set PROJ_DATA instead.
proj_crs_get_geodetic_crs: CRS has no geodetic CRS
Rel. 9.3.1, December 1st, 2023
<cs2cs>:
cannot initialize transformation
cause: Unknown error (code 4096)
program abnormally terminated

What does "CRS has no geodetic CRS" mean, and how do I fix it?

(Also, if anyone knows more about why these two different EPSGs exist, I am
curious.  One is for maps and one is for "scientific purposes" but I don't
know what that means in practice.)

---Andrew
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/proj/attachments/20240527/d78a09e8/attachment.htm>