Grib2 geographic subdomain

[Wesley Ebisuzaki]

Pierre,

     wgrib2 takes 2 minutes and cnvgrib takes 10-15 minutes?  Sounds
like the
cnvgrib code/libraries were compiled without optimization flags.

             Wesley

Pierre Cassar wrote:
> Thank you Wesley for your suggestion:
>
>
>> Try   wgrib2 -undefine out-box   W:E S:N -grib_out output.grb2
>> W,E,S,N are in degrees
>>
>
> This really reduces the big grib2 file size (over 80%) in about 2
> minutes.
> Cnvgrib on the "reduced" grib2 file now runs in about 10 minutes
> (instead of previous 15 minutes) so with this method I save about 3
> minutes of precious machine time...
> Perhaps it's time to seriously start using GRIB2 format, without
> converting to GRIB1... but it's quite hard on my machines (FreeBSD
> 6.x).
>
> Thank you again.
> Pierre Cassar
>