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
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@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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