Re: lat/lon coordinates

Hi Matt,
(Welcome to NCL!)
It should not matter whether the longitudes go from -180:180 or 0:360;
either way should work.

Can you put the following in your script:
printVarSummary(theta)
right before this line:

plot = gsn_csm_contour_map(wks,theta(0,0,:,:),res)

and send ncl-talk the results? I am curious to see what the coordinate
variables look like. Also, are you getting any error messages? Adam

Can you do a print
On 09/19/2012 03:26 PM, Matt Masarik wrote:
> Hello All,
>
> I am new to learning NCL and am having some trouble producing a plot
> from a netCDF file. When I run a script based on a contour example
> I get a map and a color bar, but no field contours. I suspect that
> the problem is with the coordinates: the longitude runs from
> -180 to 180, vs. 0 to 360.
>
> Would this longitude description cause a problem?
> Any suggestions on which method to use to re-grid?
>
> Thank you, Matt
>
>
> I included the script used below.
>
> -------------------------------------------------------------------------------------------
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>
> begin
>
> in = addfile("./AGCM_RESTART39.nc","r")
>
> lon = in->longitude
> lat = in->latitude
> sigma = in->sigma
> time = in->agcm_time
>
> theta = in->theta_agcm
>
> theta!0 = "time"
> theta!1 = "sigma"
> theta!2 = "lat"
> theta!3 = "lon"
> theta&lat@units="degrees_north"
> theta&lon@units="degrees_east"
>
> wks = gsn_open_wks("x11","contour_plot")
>
> res = True
> res@cnFillOn = True
> res@gsnSpreadColors = True
> res@gsnAddCyclic = False
>
> plot = gsn_csm_contour_map(wks,theta(0,0,:,:),res)
>
> end
>
> ----------------------------------------------------------------------------------------------------
>
>
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-- 
______________________________________________________________
Adam Phillips                                asphilli@ucar.edu
NCAR/Climate and Global Dynamics Division       (303) 497-1726
P.O. Box 3000				
Boulder, CO 80307-3000    http://www.cgd.ucar.edu/cas/asphilli
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