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HOME > Monitoring_and_Data > Oceanic and Atmospheric Data > Reanalysis: Atmospheric Data > wgrib2-grib_out

wgrib2: -grib_out


The -grib_out option writes the grid values to a specified file in grib2 format. Normally you would use the -grib option as that requires less time and preserves the precision of the data. You would only use the -grib_out option when you have modified the grid values by using the -undefine or a similar option. Use the -set_grib_type option to specify the grib packing.


-grib_out file_name


$ wgrib2 new.grb2 -undefine out-box -10:10 20:40 -grib_out small.grb2
1:0:d=2005082812:HGT:1000 mb:78 hour fcst:
The above routine sets all the grid points outside the 10W-10E 20N-40N to undefined and then writes the resultant field as a grib file in small.grb2. This file will be much smaller than the original field.

Hint: by proper use of the -undefine and -grib_out options, one should be able to send horizontal boundary conditions for regional models very very quickly. Imagine just sending 4 lines of horizontal boundary conditions.

Hint: gzip

See also: -text, -netcdf -spread -bin -ieee -grib -set_grib_type

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Page last modified: May 15, 2005
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