[gradsusr] Subsetting a NetCDF File

[Mark Hess]

Excellent thank you.  Is there any way to convert the lon from a 0-360 grid to world/geographic format 180 to -180 in this process?

Mark

  ----- Original Message ----- 
  From: Arlindo da Silva 
  To: GrADS Users Forum 
  Sent: Saturday, April 14, 2012 2:44 PM
  Subject: Re: [gradsusr] Subsetting a NetCDF File


  On Tue, Apr 10, 2012 at 5:22 PM, Mark Hess <mhess at oceani.com> wrote:

    I imagine this is a relatively simple task, but can't seem to find the answer in the gradsuser archives.  I have a NetCDF file zzz.nz.  I can open the file in GrADS, set display lat/lon range and display the data fine (in this case the data are U,V vector information).  All I am trying to do in this case is to extract a geographical subset of the zzz.nc file and then save to a new NetCDF (.nc) file.  Can you point me to a thread or some documentation on how to do this?  Thanks - Mark


  If you have opengrads then you can easily do this with lats4d. Type 


  ga-> lats4d


  for a manual page. Typically you would enter something like


  ga-> lats4d -i zzz.nz -o new_zzz -lon 30 60 -lat 10 45 -v


  and a netcdf file called "new_zzz.nc" will be created.


     Arlindo






  -- 
  Arlindo da Silva
  dasilva at alum.mit.edu



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