Re: FW: NARR Dataset Zooming into specific region

Hi Jane,

253 longitude, wrapped back to the range -180…180, yields 107, which would put the center of projection near the center of colorado; I could believe that, given the amount of rotation applied to Nebraska, in your plot. What if you set

  mpLambertMeridianF = 100 ; the center of your 1st plot window

Hope that does it…
Rick

On Sep 5, 2012, at 1:44 PM, jokalebo@huskers.unl.edu wrote:

> Rick,
> These are the values.
>
> float gridlat_221 ( gridx_221, gridy_221 )
> corners : ( 1, 0.8972797, 46.35283, 46.63458 )
> long_name : latitude
> grid_description : AWIPS - Regional - NOAMHI - High Resolution North American Master Grid (Lambert Conformal)
> units : degrees_north
> mpLambertMeridianF : 253
> mpLambertParallel2F : 50
> mpLambertParallel1F : 50
> mpProjection : LAMBERTCONFORMAL
> Dy : 32463.41
> Dx : 32463.41
> Lov : 253
> Lo1 : 214.5
> La1 : 1
> float gridlon_221 ( gridx_221, gridy_221 )
> corners : ( -145.5, -68.31888, -2.567342, 148.6397 )
> long_name : longitude
> grid_description : AWIPS - Regional - NOAMHI - High Resolution North American Master Grid (Lambert Conformal)
> units : degrees_east
> mpLambertMeridianF : 253
> mpLambertParallel2F : 50
> mpLambertParallel1F : 50
> mpProjection : LAMBERTCONFORMAL
> Latin2 : 50
> Latin1 : 50
> Dy : 32463.41
> Dx : 32463.41
> Lov : 253
> Lo1 : 214.5
> La1 : 1
>
>
>
> Jane Okalebo
> PhD student
> HPRCC, School of Natural Resources
> University of Nebraska-Lincoln
> 249 Hardin Hall
> 3310 Holdrege,
> Lincoln, Nebraska 68583-0749 U.S.A.
>
> From: Rick Brownrigg [brownrig@ucar.edu]
> Sent: Wednesday, September 05, 2012 12:06 PM
> To: jokalebo@huskers.unl.edu
> Cc: ncl-talk@ucar.edu
> Subject: Re: NARR Dataset Zooming into specific region
>
> Hi,
>
> I don't know for certain, but I am curious about the actual values used in:
>
> res@mpProjection = "LambertConformal"
> res@mpLambertParallel1F = lat2d@mpLambertParallel1F
> res@mpLambertParallel2F = lat2d@mpLambertParallel2F
> res@mpLambertMeridianF = lat2d@mpLambertMeridianF
>
> In particular, the first plot looks like the value for mpLambertMeridianF is something considerably to the west. What happens if you make it something like the center of your zoom window?
>
> Hope that helps…
> Rick
>
> On Sep 5, 2012, at 12:50 PM, jokalebo@huskers.unl.edu wrote:
>
>> Dear Sir/Madam,
>>
>> I have modified the narr_3.ncl to read precipitation from grib files from NARR.
>>
>> However, I am having difficulties zooming in on Nebraska (Latitude 39 N to 45 N and Longitudes 95 W to 104 W). The diagrams that I obtain do not appear correct.
>>
>> Please see the pdf attached.
>>
>> Kindly assist me. Should I use overlay?
>>
>> I have also tried using the solution I found online but have been struggling for a week now.
>>
>> Hi David,
>> >>> Yes, you should be able to overlay contour plots, NARR (w/2D lats/lons)
>> >>> or otherwise. Can you send the group the code you are using?
>> >>>
>> >>> One thing to watch for: Make sure the 2nd plot going into overlay is not
>> >>> a "_map" plotting function. For instance, if the first plot was created
>> >>> with this:
>> >>> plot = gsn_csm_contour_map(wks,data,res)
>> >>>
>> >>> then the second plot should be created with gsn_csm_contour:
>> >>> plot2 = gsn_csm_contour(wks,data2,res)
>> >>> overlay(plot,plot2)
>> >>>
>> >>> Adam
>>
>>
>>
>> Please find the narr_3.ncl code that I am trying to use.
>>
>>
>>
>>
>>
>>
>> Jane Okalebo
>> PhD student
>> HPRCC, School of Natural Resources
>> University of Nebraska-Lincoln
>> 249 Hardin Hall
>> 3310 Holdrege,
>> Lincoln, Nebraska 68583-0749 U.S.A.
>>
>> <test.pdf><test.ncl>_______________________________________________
>> ncl-talk mailing list
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Wed Sep 5 14:01:59 2012