[ncl-talk] add string on each domain

[Adam Phillips]

Hi Qi,
What you are seeing looks right to me.The ocean is very likely = 0.0m. When
the first contour level starts at 2, the ocean will be colored the color
that shades all areas less than 2. When the first contour level starts at
0, all areas greater than *or equal to* 0 and less than 25 (?) will be
colored green, and all areas less than 0 blue. This is a good example of
NCL color filling behavior.
Hope that helps!
Adam

On Thu, Apr 2, 2015 at 2:26 AM, LI Qi <liqi123sh at qq.com> wrote:

>
> Dear Rick,
>
> Really appreciate your help! It works!
>
> Attached is my script to add domain idx.
>
> But I still have a minor question: when the minimum contour level of
> terrain height (unit: m) is set to 0, the ocean area shows green. Only when
> set to 2, the ocean displays correctly (shown below). Why?
> The terrain data is output from WRF model.
>
> Best regards,
> Qi
>
>
> ncl script:
>   xbox = (/lon2(0,0),lon2(0,nx2),lon2(ny2,nx2),lon2(ny2,0),lon2(0,0)/)
>   ybox = (/lat2(0,0),lat2(0,nx2),lat2(ny2,nx2),lat2(ny2,0),lat2(0,0)/)
>   datatondc(map, xbox, ybox, xbox_out, ybox_out)
>   gsn_polyline_ndc(wks, xbox_out, ybox_out, lnres)
> ; domain 2 idx
>   gsn_text_ndc(wks, "d02" , xbox_out(3), ybox_out(3), txres)‍
>
> ‍
>
>
>
> ‍
>
> ------------------ Original ------------------
> *From: * "Rick Brownrigg";<brownrig at ucar.edu>;
> *Date: * Thu, Apr 2, 2015 00:47 AM
> *To: * "LI Qi"<liqi123sh at qq.com>;
> *Cc: * "ncl-talk"<ncl-talk at ucar.edu>;
> *Subject: * Re: [ncl-talk] add string on each domain
>
> Hi,
>
> There's probably a couple of ways to do this.  gsn_add_text allows you to
> add and position text in the coordinate space of the data:
>
> http://ncl.ucar.edu/Document/Graphics/Interfaces/gsn_add_text.shtml
>
>
> In the example script you referenced, you'd want to make this call before
> the call to "draw(map)" for plot 3.
>
> Alternatively, you can position the text in normalized-device-coordinate
> space (NDC-space) using gsn_text_ndc():
>
> http://ncl.ucar.edu/Document/Graphics/Interfaces/gsn_text_ndc.shtml
>
> Look in particular at how the nested domain's outline was drawn *on top
> of* plot3 using NDC coordinates:
>
> ; PLOT 3
>   draw(map)   ; domain 2 already overlaid here - so just draw again
>   xbox = (/lon2(0,0),lon2(0,nx2),lon2(ny2,nx2),lon2(ny2,0),lon2(0,0)/)
>   ybox = (/lat2(0,0),lat2(0,nx2),lat2(ny2,nx2),lat2(ny2,0),lat2(0,0)/)
>   datatondc(map, xbox, ybox, xbox_out, ybox_out)
>   gsn_polyline_ndc(wks, xbox_out, ybox_out, lnres)
>
> Hope that helps...
>
> Rick
>
>
>
>
> On Tue, Mar 31, 2015 at 8:35 PM, LI Qi <liqi123sh at qq.com> wrote:
>
>> Hello NCL community,
>>
>> I was wondering how to add strings like d01 and d02 in the top-left
>> corner of each domain separately.
>>
>> The plot of nested domains is shown below.
>> (
>> http://www2.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/Examples/EXPERIMENTAL/wrf_overlay_doms.htm
>> )‍
>>
>> ‍
>>
>>
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-- 
Adam Phillips
Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
www.cgd.ucar.edu/staff/asphilli/   303-497-1726

<http://www.cgd.ucar.edu/staff/asphilli>
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