Andrew,
The error you get is related to the fact that you can't formally
transform coordinates between 2 vertical CRS, without specifying the
"horizontal" / geographic CRS into which you enter the long, lat.
Here you, very likely, should combine them with EPSG:4312 "MGI" which is
the CRS into which the at_bev_GV_Hoehengrid_V1.tif grid is registered to
So:
$ echo 46.642970 12.792060 2513.98 | PROJ_NETWORK=ON bin/cs2cs -d 8
EPSG:4312+9274 EPSG:4312+5778
46.64297000 12.79206000 2514.15224077
Note that I've specified a latitude, longitude order as EPSG:4312 is
defined with axis in that order
Even
Le 27/05/2024 à 20:27, Andrew Kirmse via PROJ a écrit :
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
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