[ncl-talk] To add dots over desired location in a map

[Karin Meier-Fleischer]

Hi Tabish,

if you created a map plot than you can use the function 
gsn_add_polymarker to draw marker
at specific lat/lon positions:

   str              =  unique_string("mark")
   plot@$str$ =  gsn_add_polymarker(wks, plot, 77.00, 28.45., pmres)

Each polymarker has to have its own id so it is a good idea to use the 
unique_string function to generate a unique id name.

Bye,
Karin

Am 10.07.15 um 13:55 schrieb Tabish Ansari:
> Hi
>
> I wish to add dots to demarcate specific locations of my interest in 
> my map. I know the lat-lon of those locations. I am including the 
> following lines in my script:
> *
>   pmres = True
>   pmres at gsMarkerColor = "Black"
>   pmres at gsMarkerIndex = 16
>   pmres at gsMarkerSizeF = 0.01
>   gsn_polymarker(wks,plot,77.00,28.45,pmres)
>   draw(plot)       ; This will draw the map and the shapefile outlines.
>   frame(wks)       ; Advance the frame
> *
> However, no dot is visible in the map. Also I am not getting any 
> errors or warning.
>
> Please help me out with this
>
> Thanks in advance!
>
> Tabish
>
> Tabish U Ansari
> IBM Research India Laboratory
> New Delhi
>

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