[gradsusr] Unusual map displacement

[Dan Leins]

List,

Just wanted to see if anyone can point me in the right direction with this
problem. I've read through the documentation but it's still unclear to me
how to proceed with lcc grids that cross the equator. I've verified the
data in the grib file indeed stretches well below the equator and that this
is an issue isolated to GrADS.

Thanks for any help!
Dan

On Thu, Aug 16, 2012 at 3:06 AM, Dan Leins <theedge981 at gmail.com> wrote:

> 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>_______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>>
>>  --
>> Jennifer M. Adams
>> IGES/COLA
>> 4041 Powder Mill Road, Suite 302
>> Calverton, MD 20705
>> jma at cola.iges.org
>>
>>
>>
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20120824/6446cf8b/attachment-0003.html