problem with dividing a file with the gridarea
Added by Natalia L almost 5 years ago
Hi,
I have a gridded netcdf file in lonlat projection (attached test.nc) with one band. I want to divide the band with the grid cell area (in m2). I do the following;
cdo gridarea test.nc gridarea_test.nc
cdo div test.nc gridarea_test.nc test_m2.nc
The file grid area_test.nc seems correct. However the final file test_m2.nc with the division it isn't correct. Do I use the correct command?
I used cdo v.1.9.2.Thank you,
Nat
| test.nc (2.03 MB) test.nc | |||
| gridarea_test.nc (4.04 MB) gridarea_test.nc | |||
| test_m2.nc (2.03 MB) test_m2.nc |
Replies (3)
RE: problem with dividing a file with the gridarea - Added by Natalia L almost 5 years ago
Natalia L wrote:
Hi,
I have a gridded netcdf file in lonlat projection (attached test.nc) with one band. I want to divide the band with the grid cell area (in m2). I do the following;
cdo gridarea test.nc gridarea_test.nc
cdo div test.nc gridarea_test.nc test_m2.ncThe file grid area_test.nc seems correct. However the final file test_m2.nc with the division it isn't correct. Do I use the correct command?
I used cdo v.1.9.2.
Thank you,
Nat
edit: The problem is than in m2_test.nc file most values are zero (Nan)
RE: problem with dividing a file with the gridarea - Added by Ralf Mueller almost 5 years ago
I think the problem is that your missval is ZERO. If you change it, the division does work. you can do this with
cdo -setmissval,9E-38 test.nc test_.nc
hth
ralf
RE: problem with dividing a file with the gridarea - Added by Natalia L almost 5 years ago
Hi Ralf,
thank you. It seems it doesn't work again. Did you try to run the division with the attached test.nc file? Did you get the same spatial pattern on both files (test.nc, m2_test.nc)?
Best,
Natalia