Re: NCL southern hemisphere bug

Hi Zach,

Actually I think you are probably correct that there is an NCL bug.
As you know the lat/lon values
you are using are actually generated by NCL and there does appear to
be a problem
I haven't had a chance to look at the code yet but It looks as if the
direction from the start lat/lon
may be not correctly determined for this grid.

I am investigating.
  -dave

On Jan 7, 2008, at 2:41 PM, Mary Haley wrote:

>
> Hi Zach,
>
> I ran your script, and the lat/lon arrays that define the area for
> your data are going from:
>
> Lat: -55.6723 to -42.0324
> Lon: 115.609 to 136.581
>
> This is exactly where NCL is placing your plot, so this looks correct
> to me.
>
> The plotting area in the GEMPAK map is more around:
>
> Lat: -45 to -32
> Lon: 135 to 153
>
> Perhaps the lat/lon locations that you are giving to GEMPAK
> are different that what you are using in the NCL script?
>
> To see where the lat2d/lon2d locations are, I added this
> after your call to gsn_csm_contour_map:
>
> draw(plot)
> gsn_polymarker(wks,plot,ndtooned(lon2d),ndtooned(lat2d),False)
> frame(wks)
>
> --Mary
>
> On Mon, 7 Jan 2008, Zachary DuFran wrote:
>
>> NCL help-
>>
>>
>>
>> I have plotted WRF GRIB-1 output from a southern hemisphere run
>> with NCL
>> (version 5.0.0) and found the data to be plotted in the wrong
>> location.
>> The data should be centered on Melbourne, Australia (lat=-38.45,
>> lon=144.83), but is located farther SW of that location. The same
>> GRIB-1 file plots correctly with GEMPAK.
>>
>>
>>
>> I have attached the GRIB-1 file and NCL script, as well as
>> screenshots
>> from NCL and GEMPAK.
>>
>>
>>
>> Thanks for your help-
>>
>> Zach DuFran
>> Meteorologist / Developer
>> Weather Decision Technologies Inc <http://www.wdtinc.com/> .
>> 3100 Monitor Avenue, Suite 280
>> Norman, OK 73072
>> 405.579.7675 x 249
>> 405.517.1112 cell
>>
>>
>>
>>
> _______________________________________________
> ncl-talk mailing list
> ncl-talk_at_ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

_______________________________________________
ncl-talk mailing list
ncl-talk_at_ucar.edu
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Mon Jan 07 2008 - 16:28:08 MST