Re: Projection problem

Hi Paula,

I don't think this is an issue with NCL.

There have been some cases with the WRF files having the wrong map projection information on the file, like the wrong center longitude, which can cause problems for plotting. You must have the exact map projection in order for the map to line up with your data (when tfDoNDCOverlay=True). It looks like that could be happening here.

You might try printing the file variable and looking at the mapping attributes on the file to see if any of the values look suspicious or flat out wrong.

Without seeing your script, however, I am only guessing at what might be the problem.

If you can provide the script and data, that would be helpful. See:

http://www.ncl.ucar.edu/report_bug.shtml

for information on where to ftp them.

--Mary

On May 4, 2010, at 12:11 PM, Paula Doubrawa Moreira wrote:

> Hey All
>
> I originally sent this message to wrfhelp but got no reply so I'm sending it here and hoping that someone might enlighten me.
>
> I'm having trouble getting the WRF projection right on ncl.
>
> I've plotted using wrf_contour and wrf_map_overlays and also using wrf_mapres_c and tfDoNDCOverlay=True and I always get the projection off place (check image attached).
>
> I've also print the parameters that wrf_mapres_c creates and changed them to try and get a better projection but things just got worse. Even if I literally copy the example scripts off the ARW NCL page it's offset.
>
> Is this a problem with my run or is it in ncl? Any suggestions?
>
> -paula
>
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Received on Tue May 4 16:38:35 2010