Re: contour plot problem

Hi Ed,
When this happens you need to set mpCenterLonF:
http://www.ncl.ucar.edu/Document/Graphics/Resources/mp.shtml#mpCenterLonF

One automatic way to do it:
res@mpMinLonF = 160.
res@mpMaxLonF = 180.
res@mpCenterLonF = (res@mpMinLonF+res@mpMaxLonF)/2.

Good luck,
Adam

> Hello:
>
> I used the ncl script as shown below to plot. When I set:
>
> res@mpMinLatF = -55 ; range to zoom in on
> res@mpMaxLatF = -25.
> res@mpMinLonF = 160.
> res@mpMaxLonF = 180.
>
> The plotted figure is OK. However, when I set
>
> res@mpMaxLonF = 190. ;instead of 180.
>
> The plotted figure is quite odd. It shows all the map between -25 S and
> -55 S of the earth, instead of the region from 160E to 170W.
>
> Can you tell me what is wrong with my setting? Thank you!
>
> Regards
> Ed
>
> begin
> files = "uas_2000.nc"
>
> f = addfile(files, "r")
> T = f->uas(10,{-55:-25},{160:190})
>
> wks = gsn_open_wks("x11" ,"ce") ; open a ps file
>
> gsn_define_colormap(wks,"BlAqGrYeOrRe") ; choose colormap
>
> res = True ; plot mods desired
>
> res@cnFillOn = True ; turn on color fill
> res@cnLinesOn = False ; turn of contour lines
> res@cnLevelSpacingF = 0.5 ; contour spacing
> res@gsnSpreadColors = True ; use full range of color map
> res@lbLabelStride = 4
> res@lbOrientation ="vertical"
> ; res@pmTickMarkDisplayMode = "Always"; use NCL default lat/lon labels
>
> res@gsnAddCyclic = False ; data already has cyclic point
> ; this must also be set for any
> zoom
>
> res@mpMinLatF = -55 ; range to zoom in on
> res@mpMaxLatF = -25.
> res@mpMinLonF = 160.
> res@mpMaxLonF = 180.
>
> plot = gsn_csm_contour_map(wks,T, res)
> end
>
>
>
>
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Received on Thu, 15 Oct 2009 22:29:25 -0600 (MDT)