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MERGE_GRID

Added by kunal bali over 5 years ago

Dear CDO users,

I am trying to merge the grids of two different files using

<>
cdo mergegrid file_01.nc file_02.nc
<>

but it's not working at least for the attached files. please let me know how to sort out this problem.

regards

Kunal

Download all files
mask_himachal1.nc (1.52 MB) mask_himachal1.nc shapefile_himachal_state
mask_Jnk1.nc (1.52 MB) mask_Jnk1.nc shapefile_JnK

Replies (1)

RE: MERGE_GRID - Added by Ralf Mueller over 5 years ago

since you did not write, what exactly is the problem, here is my analysis:
  • I could run the command with cdo-1.9.6 without problems
  • both input files have identical grids, so I doubt that mergegrid is the operator you need - there is nothing to merge here:
    % cdo sinfov mask_himachal1.nc mask_Jnk1.nc                                                                                                                                                                                                                                                          [Wed 2019-06-05|12:28:10]
Warning (cdfScanVarAttr): NetCDF: Variable not found - lat_bnds
Warning (cdfScanVarAttr): NetCDF: Variable not found - lon_bnds
   File format : NetCDF
    -1 : Institut Source   T Steptype Levels Num    Points Num Dtype : Parameter name
     1 : unknown  unknown  c instant       1   1    396000   1  I32  : mask_array    
   Grid coordinates :
     1 : lonlat                   : points=396000 (600x660)
                              lon : 68.025 to 97.975 by 0.05 degrees_east
                              lat : 5.025 to 37.975 by 0.05 degrees_north
   Vertical coordinates :
     1 : surface                  : levels=1
Warning (cdfScanVarAttr): NetCDF: Variable not found - lat_bnds
Warning (cdfScanVarAttr): NetCDF: Variable not found - lon_bnds
   File format : NetCDF
    -2 : Institut Source   T Steptype Levels Num    Points Num Dtype : Parameter name
     1 : unknown  unknown  c instant       1   1    396000   1  I32  : mask_array    
   Grid coordinates :
     1 : lonlat                   : points=396000 (600x660)
                              lon : 68.025 to 97.975 by 0.05 degrees_east
                              lat : 5.025 to 37.975 by 0.05 degrees_north
   Vertical coordinates :
     1 : surface                  : levels=1
cdo sinfon: Processed 2 variables [0.01s 40MB]
  • coordinate bounds are not present in the file although they are mentioned as the value of the bounds attribute of both lon and lat.

cheers
ralf

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