[gradsusr] Shift in the lattitude while plotting in grads mercator/latlon projction

[James T. Potemra]

Itesh:

Your model output is 640 x 460, but your descriptor file has
xdef = 639 and ydef = 459.  These should be 640 and 460,
respectively.  Also, I think what Mohsen meant was to make
sure your starting lat/lon is the same in the descriptor file
and model grid, i.e., you have 61.1815 as the starting lon
and -3.1006 as the starting lat.  Are these the same as the
model grid?

Jim

On 7/11/13 7:31 AM, itesh dash wrote:
> Dear Mohsen,
>
> thanks for the response. But I am not even trying to use any script. 
> Just by opening and plotting the ctl file.
>
> Here is my ctl file
>
> dset ^Jul1013_12.dat
> undef 1.e35
> xdef  639 linear   61.1815   0.0935
> ydef  459 linear   -3.1006   0.0873
> zdef    3 levels
>   850.00000
>   500.00000
>   200.00000
> tdef         8 linear 12z10jul2013  6hr
> vars 1
> HGT 0 0 Terrain Height
> endvars
>
> The wrf model ran with mercator projection 640 x 460 grid points 9 km 
> resolution.
>
> I could not figure out why the shift is there. Is there a way i can 
> balance the shift.
>
> regards,
> itesh
>
>
> On Thu, Jul 11, 2013 at 11:58 PM, Mohsen Soltani 
> <soltani.clima at gmail.com <mailto:soltani.clima at gmail.com>> wrote:
>
>     itesh,
>
>     Make sure Lat/Lon in your .ctl file are the same as your script!
>
>     Mohsen
>
>     -- 
>     April showers bring May flowers!
>     --
>     *Mohsen Soltani, M.Sc.*
>     Climatology Grad Student,
>     Department of Climatology, Faculty of Geography,
>     University of Tehran, Tehran, Iran
>     voice: (+98) 9119772934
>     e-mail: soltani.clima at gmail.com <mailto:soltani.clima at gmail.com>
>
>
>     On Thu, Jul 11, 2013 at 9:05 AM, itesh dash <itesh at rimes.int
>     <mailto:itesh at rimes.int>> wrote:
>
>         Dear Sir,
>
>         I am working with the WRF and tried to plot the output in
>         grads. I found there is nearly 1 degree shift in the
>         projection and the plot.
>
>         Please guide how to correct this.
>
>         I am using mercator projection for the WRF model. Please find
>         attached image.
>
>         Seeking your advice on the same.
>
>         regards,
>         itesh
>
>
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