Re: High resolution coastilines in wrf_map_overlays function?

Tabish,

To add to Adam's email: Hanna is adding her shapefiles using an older method. You can see this in her email at:

http://www.ncl.ucar.edu/Support/talk_archives/2014/0317.html

Her code can be simplified by using the "gsn_add_shapefile_polyline" function.

So, after the call to wrf_map_overlays:

plot = wrf_map_overlays(a,wks,contour_SO2,pltres,mpres)

add this code:

  shapefile_name = "xxxxx.shp" ; replace with name of your shapefile

  lnres = True
  lnres@gsLineColor = "red" ; whatever color you want
  lnres@gsLineThicknessF = 2.0 ; default is 1.0

  dum = gsn_add_shapefile_polylines(wks,plot,shapefile_name,lnres)

  draw(plot) ; This will draw the map and the shapefile outlines.
  frame(wks) ; Advance the frame

--Mary

On Feb 19, 2014, at 11:36 AM, Adam Phillips <asphilli@ucar.edu> wrote:

> Hi Tabish,
> Please see the previous ncl-talk email that I sent to Hanna (+ncl-talk) about a 1/2hr ago. She was using wrf_map_overlays and drawing shapefile output as well. The different projections should not be a problem..
>
> If you have any further questions please respond to ncl-talk only.
> Adam
>
> On 2/19/14, 11:30 AM, Tabish Ansari wrote:
>> Dear Mary,
>>
>> Thank you very much for your mail.
>>
>> I was able to achieve that after figuring out a few more sample NCL scripts on coastlines. However, I have another query: I had attended your webinar and have downloaded the shapefiles for my country. However, I am not sure how to overlay them upon my WRF output which I plot using the wrf_map_overlays function.
>>
>> I am not able to turn on the National boundaries on for India. Please help me do that with or without using shapefiles. Another issue is: My wrf data is on a Mercator projection but the shapefile seems to be in a lat-lon rectangular projection. How do I then use it in my wrf plots?
>>
>> Many thanks in advance
>>
>>
>> On 19 February 2014 23:48, Mary Haley <haley@ucar.edu> wrote:
>> Hi Tabish,
>>
>> You should be able to use the high-res coastlines.
>>
>> When you call wrf_map_overlays, there are two resource lists passed in. It's the second one that you use to add the map resources to.
>>
>> So, for example, if you have a call:
>>
>> plot = wrf_map_overlays(a,wks,(/contour_tc,contour_psl,vector/),pltres,mpres)
>>
>> then try adding this resource before you call wrf_map_overlays:
>>
>> mpres@mpDataBaseVersion = "HighRes" ; defaults to "MediumRes" in WRFUserARW.ncl
>>
>>
>> --Mary
>>
>>
>> On Feb 19, 2014, at 12:02 AM, Tabish Ansari <tabishumaransari@gmail.com> wrote:
>>
>> > Hello
>> >
>> > I have recently downloaded the rangs data for high resolution coastlines as it is mentioned here. Can I use this option in wrf_map_overlays function or is it only a feature of gsn_csn_contour_map function?
>> >
>> > My aim is to plot my wrf output using these high-res coastlines so I would like to use the inherent map projection in my wrf file to plot the data.
>> >
>> > --
>> > Thanks & Regards
>> > Tabish Umar Ansari
>> > MS Research Scholar
>> > Environmental & Water Resources Engineering Division
>> > Department of Civil Engineering
>> > IIT Madras
>> > _______________________________________________
>> > ncl-talk mailing list
>> > List instructions, subscriber options, unsubscribe:
>> > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>>
>>
>> --
>> Thanks & Regards
>> Tabish Umar Ansari
>> MS Research Scholar
>> Environmental & Water Resources Engineering Division
>> Department of Civil Engineering
>> IIT Madras
>>
>>
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Received on Wed Feb 19 16:07:02 2014