[gradsusr] map projection error: invalid coords for nps

[Lee Byerle]

Mira,
For NPS projection, try setting your latitude dimensions solely to the northern hemisphere.  For example, set lat 20 90.

good luck,
Lee
On Sep 21, 2012, at 4:56 PM, mberdahl at envsci.rutgers.edu wrote:

> Hi all,
> 
> I am trying to plot some wind vectors in GrADS from a netcdf file, on a
> polar stereographic projection, but I receive the following error:
> 
> Map Projection Error:  Invalid coords for NPS
>  Will use linear lat-lon projection
> 
> A nice lat/lon plot is produced without a problem, but any other
> projection I choose gives the above error.
> 
> I have copied my ctl file and the grads commands I execute below.
> Does anyone have any thoughts on how to resolve this issue?
> 
> Many thanks!
> Mira
> 
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> GrADS commands:
> 
> reinit
> 
> *what file to open
> open MPI_wind_diff.ctl
> 
> *set projection, display background, and resolution of background
> set display color white
> set background 1
> set mpdset hires
> set mproj nps
> set grid on
> set gxout vector
> 
> d uaDiff;vaDiff
> set arrlab on
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> CTL FILE:
> 
> dset ^MPI_wind_diff.nc
> dtype netcdf
> title Difference between ua and va for LIA to MCA periods
> undef -999
> xdef 192 linear  0 1.875
> ydef 96  linear  -88.5721664428711 1.8496
> tdef  1 linear 06Z01JAN1400  1mo
> zdef  1 levels 500
> vars 4
> longitude=>lon 1 y,x **longitude
> latitude=>lat 1 y,x **latitude
> uaDiff=>uaDiff 1 y,x **ua difference (m/s)
> vaDiff=>vaDiff	1 y,x ** va difference (m/s)
> endvars
> 
> 
> 
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