[GRASS-user] Help needed with a coordinate projection problem

[Veronica Andreo]

Hi Thomas,

I have no suggestion other than to create an issue here
https://github.com/OSGeo/grass/issues with a reproducible example so others
can easily test. Also report the GDAL and PROJ versions you have.

Best,
Vero

El mar, 19 oct 2021 a las 14:50, Thomas Adams (<tea3rd at gmail.com>) escribió:

> Hi all,
>
> I have run into a problem with the development version of GRASS 7.8.6 and
> with the latest versions of PROJ and GDAL. I had a significant issue a
> couple of months ago and had to re-build GRASS, etc. and I have been trying
> to get back where I was since that time.
>
> A major part of the work I do is working with US NOAA/NWS raster radar
> precipitation data in what's called xmrg format... a binary grid file that
> relies on a very obtuse 'projection' called HRAP, described here (and
> within linked files): https://www.weather.gov/owp/oh_hrl_distmodel_hrap
> -- it basically relies on a polar stereographic projection with a spherical
> Earth model with these parameters:
>
> -PROJ_INFO-------------------------------------------------
> name       : Stereographic
> proj       : stere
> a          : 1337.784777
> es         : 0.0
> f          : 0.0
> lat_0      : 90.0000000000
> lat_ts     : 60.0000000000
> lon_0      : -105.0000000000
> k_0        : 1.0000000000
> x_0        : 401.0
> y_0        : 1601.0
> -PROJ_UNITS------------------------------------------------
> unit       : meters
> units      : meters
> meters     : 1.0000000000
>
> Previously, I had been able to re-project raster and vector maps to/from
> this location from other map locations with different projections. Now I
> cannot do this; I now get this error:
>
> v.proj location=world_location mapset=teaiii input=st_us
>
> proj_create_operations: Source and target ellipsoid do not belong to the
> same celestial body
> proj_create_operations: Source and target ellipsoid do not belong to the
> same celestial body
> WARNING: proj_create() failed for '(null)'
> ERROR: Unable to initialize coordinate transformation
>
> Any ideas what I might try?
>
> Thank you,
> Tom
>
>
>
>
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