[ncl-talk] Plot a contour

[bozkurtd at itu.edu.tr]

  Dear Abdolhalim,

Attached is the script that I use to plot topography map of RegCM4 output.
As Mary pointed out, you need to define some more information for zooming
in on your data. In the attached script you can find how to get lat/lon
values from your file and define lat/lon of projection origin.
For masking, just select and define “landuse” variable from your file
and then use “mask” function of NCL
(http://www.ncl.ucar.edu/Document/Functions/Built-in/mask.shtml) to mask
land or sea by choosing corresponding numbers from the “landuse”.
Hope that helps. If not, let ncl-talk know.
Deniz

--
Deniz Bozkurt, PhD
Post-doctoral Fellow
Center for Climate and Resilience Research
Department of Geophysics, University of Chile
Blanco Encalada 2002, Santiago, Chile
E-mail: dbozkurt at dgf.uchile.cl, deniboz at gmail.com
Web: http://dgf.uchile.cl/~dbozkurt/

Alinti Mary Haley <haley at ucar.edu>

> Dear Abdolhalim,
>     
>    Welcome to ncl-talk. Always good to have new NCL users on board.
>     
>    Since you want to plot this over a map, you should use
> gsn_csm_contour_map instead of gsn_contour.
>     
>    gsn_csm_contour_map will give you more "value added" graphics, as it
> will look at your "t" variable and try to set some graphical options for
> you, like titles, and labels on the X and Y axis. It will also
> automatically give you a labelbar if you set "cnFillOn" to True.
>     
>    Please try the attached script. I took out a lot of your resource
> settings, because they are likely not needed if you use
> gsn_csm_contour_map.  The one issue you will have is that your map won't
> be zoomed in, because the default is to give you a global map.  
>     
>        You may want to see this page for examples of zooming in on
> regional climate data:
>      
>     http://www.ncl.ucar.edu/Applications/rcm.shtml
>      
>
>    If you get an error in your script, then please post back to
> ncl-talk, but put the following line in your script and let us know what
> it says:
>     
>    printVarSummary(t)
>     
>    Also include the error message.
>     
>    As a beginner to NCL, I suggest going here:
>     
>    http://www.ncl.ucar.edu/get_started.shtml
>     
>    and in particular, look at the "Information on learning NCL section".
>     
>    Most folks who need to write NCL scripts to look at their data use
> our "examples" page:
>     
>    http://www.ncl.ucar.edu/Applications/
>     
>    Good luck,
>     
>    -Mary
>     
>
>     On Thu, Jun 11, 2015 at 3:47 AM, saeed bayat
> <saeedbayat7276 at gmail.com> wrote:
>
>> Dear NCL Users
>> I am pretty new in NCL. I am using output of RegCM4 to plot topo in
>> NCL. I want to add mask to the map and country borders and then change
>> the numbers of X and Y axis to the real lat and lon.
>>  I attached the plot I got using one template codes in NCL website (and
>> the script). Also attached the header information of file I am using.
>> Please help me to solve the problem.
>>
>> --
>>                                               Abdolhalim Bayat
>>                  Ph.D Candidate of Synoptic Climatology
>>               The Tehran University of Iran
>>
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