[gradsusr] Unusual map displacement

[Dan Leins]

Jennifer,

Yes, the data is on a lambert projection that crosses the equator. If pdef
lcc isn't the appropriate option, what else can I try? I've looked through
the pdef documentation but I don't see anything that stands out as the
obvious solution.

For reference, here is how my pdef line is currently defined in my control
file:

*pdef 269 169 rotllr -10.242000 -88.026000 1 1 25.118000 25.118000
-46.680000 40000 40000*

Here's some metadata about the grib file itself:

*      File Name                :  201207240600_arw_wrfout_d01.grb*
*      File Format              :  GRIB 1*
*      Model ID                 :  116*
*      Center ID                :  7*
*      Sub Center ID            :  0*
*
*
*      Grid Projection          :  Lambert Conformal*
*
*
*      Grid Dimensions  NX x NY :  269 x 169*
*      Grid Spacing      DX, DY :  40.000km, 40.000km*
*      Standard Latitude        :  25.118*
*      Standard Longitude       :  -46.680*
*      Latitude, Longitude (1,1):  -10.242,  -88.026*
*      True Lat1, Lat2          :  25.118,  25.118*
*      Pole                     :  North Pole*
*      Scan                     :  WE:SN*
*
*
*      Corner Lat-Lon points of the domain:*
*
*
*         43.14, -111.83             43.15, 18.45*
*        *                            **
*
*
*                       * 24.75, -47.09*
*
*
*        *                            **
*         -10.24, -88.03             -10.24, -5.35*


Any advice on how to proceed?

Thanks!
Dan

On Fri, Aug 10, 2012 at 4:24 PM, Jennifer Adams <jma at cola.iges.org> wrote:

> If the native grid is on a lambert projection that crosses the equator? If
> so, then the pdef lcc won't work properly. --Jennifer
>
>
> On Aug 10, 2012, at 6:14 PM, Dan Leins wrote:
>
> List,
>
> I have a grib1 file from a WRF model which is displaying improperly in
> GrADS. The domain is fairly large and crosses the equator as well as the
> prime meridian. Here is the output from q dims:
>
> X is varying   Lon = -88.026 to 11.0066   X = 1 to 269
> Y is varying   Lat = -10.242 to 50.8489   Y = 1 to 169
> Z is fixed     Lev = 1013  Z = 1
> T is fixed     Time = 06Z24JUL2012  T = 1
> E is fixed     Ens = 1  E = 1
>
>
> I'm attaching an image of the 'landsfc' field from the grib file, it's
> obvious that the field is displaced too far north.
>
> Any idea what could be going on here? I've tried setting different map
> projections in GrADS but that doesn't resolve the problem.
>
> Thanks for any help!
> Dan
> <landsfc.png>_______________________________________________
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>
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>
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>
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