[ncl-talk] Regarding annotation

[swati shewale]

Thanks a lot Mary for your kind suggestion. I will put it in my plot.

On Tue, Dec 5, 2017 at 10:40 PM, Mary Haley <haley at ucar.edu> wrote:

> The key to adding markers, text, lines, or polygons to a WRF plot that was
> generated using wrf_map_overlays is to set the special resource "PanelPlot"
> to True, which tells wrf_map_overlays to not draw the plot after the
> overlay, *and* to not remove all the overlays. It looks something like this:
>
>   mapres = True
>   pltres = True
>   pltres at PanelPlot = True     ; Tells wrf_map_overlays to not draw plot
> and
>                               ; to not remove the contours afterwards.
>
>   plot = wrf_map_overlays(a,wks,contour,pltres,mapres)
>
> Then you can add whatever you want to the "plot", using lat/lon values:
>
> ;---Add two dots and two text strings at location of US cities.
>
>   lats  = (/   29.95,       33.75,      36.16,      41.88/)
>   lons  = (/  -90.07,      -84.39,     -86.78,     -87.63/)
>   tstrs = (/"New Orleans","Atlanta", "Nashville", "Chicago"/)
>   mkres = True
>   txres = True
>   mkres at gsMarkerIndex = 16 ; filled dot
>
>   txres at txFontHeightF = 0.015
>   txres at txJust        = "CenterLeft"
>
>   mkid = gsn_add_polymarker(wks,plot,lons,lats,mkres)
>   txid = gsn_add_text(wks,plot,"   " + tstrs,lons,lats,txres)
>
>   draw(plot)
>   frame(wks)
>
> I've attached a sample script and the resultant PNG, which I will add to
> our example page somewhere.
>
> --Mary
>
>
> On Tue, Dec 5, 2017 at 3:59 AM, swati shewale <shewaleswati16 at gmail.com>
> wrote:
>
>> about above query, I went through function 'str_get_cols'. I understood
>> it. Now I want to put single city (Ahmedabad) annotation in my plotting. I
>> am afraid as am handling wrf file, Can I  accommodate it? please find the
>> attachment, annotation.txt (contains single city), annotation.ncl (wish to
>> put all the statements from this file to wrf_annotation.ncl so that It
>> could reflect Ahmedabad city). kindly provide suggestion.
>>
>> On Tue, Dec 5, 2017 at 12:30 PM, swati shewale <shewaleswati16 at gmail.com>
>> wrote:
>>
>>> Thanks a lot Mary for quick response. I did download text file provided
>>> in link before running annotation_5.ncl. Actually to see values of lons in
>>> print statement, I removed minus sign from below statement that leads to
>>> blank plot (this I rectify while comparing with your script, thanks for
>>> your time). If text file includes all positive lons, why here used minus?
>>>   lons       = -tofloat(str_get_field(data,3," "))
>>>
>>> Also what 22 signifies in below statement
>>>
>>>    city_state = str_get_cols(data,22,-1)
>>>
>>> On Mon, Dec 4, 2017 at 9:32 PM, Mary Haley <haley at ucar.edu> wrote:
>>>
>>>> This example works with NCL V6.2.0 (I just verified this). However, I
>>>> still highly recommend that you upgrade. V6.2.0 is 3.5 years old.
>>>>
>>>> Did you modify annotate_5.ncl at all?  I've attached a version that
>>>> loops through each city and plots each text string and marker one at a
>>>> time, just in case.
>>>>
>>>> This method is NOT recommended as it is slower and more memory
>>>> intensive.
>>>>
>>>> If this continues to not work for you, then please include the full
>>>> script and the annotate5.txt file you are using, so we can be sure
>>>> something else isn't going on.
>>>>
>>>> --Mary
>>>>
>>>>
>>>> On Mon, Dec 4, 2017 at 3:48 AM, swati shewale <shewaleswati16 at gmail.com
>>>> > wrote:
>>>>
>>>>> Dear NCL users
>>>>>
>>>>> I wish to add annotations to my plot. I gone through below link.
>>>>>
>>>>> https://www.ncl.ucar.edu/Applications/annotate.shtml
>>>>>
>>>>> for time being I took example 5 (annotate_5.ncl
>>>>> <https://www.ncl.ucar.edu/Applications/Scripts/annotate_5.ncl>) as it
>>>>> is, It gives me plot without annotation (attached here). Is it because my
>>>>> NCL version is 6.2.0?
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
>>>
>>
>
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