Re: Plotting WRF Polar Stereographic Output onto Orthographic Projection

Hi Walter,

Did you see our applications examples page at:

   http://www.ncl.ucar.edu/Applications/wrfpo.shtml

I think this will fix the problem you are having with the messages
about lack of coordinate units. You want to use the special "lat2d"
and "lon2d" variables mentioned on this page, and look at the scripts
to see how it's done.

Good luck,

--Mary

On Thu, 21 Feb 2008, Walter R Sessions wrote:

> I am having difficulty modifying the WRF NCL scripts to appropriately
> plot polar stereographic data onto a full polar orthographic projection.
>
> The input data is on a 270 x 270 grid, with lat/lon being among the
> gridded variables and not a array coordinate to my variables of interest
> (temp, pres, winds). NCL is new to me, but it appears that the current
> functions create a plot area based upon the lat/lon boundaries, then
> plots the rest of the data based upon the grid, without any 'true'
> association between the lat/lon and plotted data.
>
> When attempting the use the polar orthographic sample script, it
> complains about the lack of coordinate array units (since there is no
> coordinate array) and appears to use the grid points as degrees
> (plotting 3 quarters of the globe, beginning at the prime meridian).
>
> How do I go about associating my data with the appropriate lat/lon
> coordinates and getting it onto the projection?
>
> Any advice is appreciated,
>
> Walter
>
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Received on Mon Feb 25 2008 - 08:24:05 MST