Re: Contour Overlay

On Mar 1, 2011, at 1:24 PM, fengxy wrote:

> Hi Mary,
> Thank you very munch for your help. Now, the 500mb heights can overlay on terrain.
> I also have some minor problem:
> 1. The line color of heights set "Blue", but it shows "Black".
This is because you've chosen a color map that has no blue in it, "sunshine_9lev".

You can add blue to this color map with:

   NhlNewColor(wks,0.,0.,1.0)

but you would also need to set:

  tres@gsnSpreadColorEnd = -2

so that the new blue color is not used in your contour colors.

> 2. How can I turn off the subtitles of terrain map, not the line contour.

I don't know how to turn off the left title that wrf_contour creates. It seems to be hard-coded. I've CC'ed wrfhelp@ucar.edu for this one.

--Mary

> Thank you.
> Xinyuan
>
> 2011-03-02
> fengxy
> ·¢¼þÈË£º Mary Haley
> ·¢ËÍʱ¼ä£º 2011-03-02 02:05:50
> ÊÕ¼þÈË£º fengxy
> ³­ËÍ£º ncl-talk
> Ö÷Ì⣺ Re: [ncl-talk] Contour Overlay
> Hi Xinyuan,
>
> The problem is that wrf_map_overlays removes the contour plot after it overlays it. I think this is so you can use this map again later to overlay something else.
>
> To trick wrf_map_overlays into *not* removing the overlay, set:
>
> pltres@PanelPlot = True
>
> This makes the wrf_map_overlays function think you are going to panel the plots later, and hence it won't remove anything.
>
> You'll also want to uncomment the frame call.
>
> So, basically, in your NCL script, change these lines:
>
> pltres = True
> mpres = True
> plot = wrf_map_overlays(a,wks,(/contour/),pltres,mpres)
> overlay(plot,plot_ov)
> draw(plot)
> ; frame(wks)
> end do
>
>
> to:
>
> pltres = True
> mpres = True
> pltres@PanelPlot = True
> plot = wrf_map_overlays(a,wks,(/contour/),pltres,mpres)
> overlay(plot,plot_ov)
> draw(plot)
> frame(wks)
> end do
>
>
> The line labels are a bit much, and your information label is in a weird place, so you might want to additionally set these resources:
>
> res@cnLineLabelsOn = False
> res@cnInfoLabelOrthogonalPosF = -0.17
>
> Finally, you have two sets of subtitles overwriting each other at the top. My suggestion is to turn them off for the line contour plot:
>
> res@gsnRightString = ""
> res@gsnLeftString = ""
>
> You may need to change or add other titles as appropriate.
>
> --Mary
>
>
>
> On Mar 1, 2011, at 10:57 AM, fengxy wrote:
>
>> Hi,
>>
>> I'm trying to overlay 500mb heights on terrain. However, it just plots terrain. If set the "cnFillOn" to "False", the 500mb heights can show up over terrain. So I think it's not the problem of lat/lon coordinate arrays. The terrain data is from WPS and the 500mb heighs is reanalysis data. And I use "wrf_map_overlays" to create terrain map.
>> I've provided the files offline. Could anyone suggest something I could try?
>> Thank you!
>> Xinyuan
>>
>> 2011-03-02
>> fengxy
>> _______________________________________________
>> 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 Mar 2 09:17:00 2011