[ncl-talk] gsn_polyline and shading issue

[Adam Phillips]

Hi Cathy,
Try setting pres at tfPolyDrawOrder = "PostDraw". That resource should control
when the polylines are drawn. If that doesn't solve it let everyone know.
Adam


On Mon, Aug 4, 2014 at 3:01 PM, Cathy Smith - NOAA Affiliate <
cathy.smith at noaa.gov> wrote:

> I tried res at mpFillDrawOrder  (which I think is what you were referring
> to; the other doesn't exist)
>
> I set to PreDraw, Draw and Post Draw and got the same behavior. I did see
> some doc here
>
> http://www.ncl.ucar.edu/Applications/draworder.shtml
>
> which is along the lines of what you suggested but didn't seem to work for
> the routines I used. I wonder if there is a way to draw the polylines last
> instead of the shaded fill first?
>
> Thanks for the suggestion.
>
> Cathy
>
>
> On Mon, Aug 4, 2014 at 2:43 PM, Kyle Griffin <ksgriffin2 at wisc.edu> wrote:
>
>> I believe the quick fix, assuming nothing else is explicitly ordered,
>> will be
>>
>> res at mpDrawOrder = "PreDraw"
>>
>> If that doesn't do it, you can poke around with other DrawOrder resources
>> to move things into either "PreDraw", "Draw", or "PostDraw" drawing phases.
>>
>>
>> Kyle
>>
>> ----------------------------------------
>> Kyle S. Griffin
>> Department of Atmospheric and Oceanic Sciences
>> University of Wisconsin - Madison
>> Room 1421
>> 1225 W Dayton St, Madison, WI 53706
>> Email: ksgriffin2 at wisc.edu
>>
>>
>> On Mon, Aug 4, 2014 at 3:28 PM, Cathy Smith (NOAA Affiliate) <
>> cathy.smith at noaa.gov> wrote:
>>
>>> Hi NCLers
>>> I'm having trouble getting a polyline to appear OVER a map with
>>> continents shaded. I have simplified code below which reproduces the
>>> problem.  The code draws a basic map (shading is default) and then a box
>>> on the map using gsn_polyline . You can run code and then look at
>>> fluffy.ps. The box just shows up where there is no shading. I verified
>>> in testing that the lines show up as long as they aren't located where
>>> the shading is. How can I control the order of shading so it is done
>>> before the polylines?
>>>
>>> NCL version is 6.2.0 on a 64 bit linux server.
>>>
>>> Thanks!
>>> Cathy Smith
>>>
>>>
>>> ;*;************************************************
>>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>>> ;**************************************************
>>> begin
>>>
>>>    psname="fluffy"
>>>    wks = gsn_open_wks("ps",psname)               ; open workstation
>>>    res            = True                          ; map resources
>>>    res at gsnDraw    = False                         ; don't draw
>>>    res at gsnFrame   = False                         ; don't advance frame
>>>    res_lb         = True                          ; map resources
>>>    latmin=41
>>>    latmax=52
>>>    lonmin=235
>>>    lonmax=250
>>>    poly_lat1=43
>>>    poly_lat2=50
>>>    poly_lon1=237
>>>    poly_lon2=247
>>>    res at mpMaxLatF  = latmax                           ; select subregion
>>>    res at mpMinLatF  = latmin
>>>    res at mpMinLonF  = lonmin
>>>    res at mpMaxLonF  = lonmax
>>>    res at mpCenterLonF  = (lonmax+lonmin)/2.
>>>
>>>    map = gsn_csm_map_ce(wks,res)                         ; create map
>>>
>>>    pres                  = True                             ; polyline
>>> resources
>>>    pres at gsLineThicknessF = 2.0                ; line thickness
>>>
>>>
>>>
>>> gsn_polyline(wks,map,(/poly_lon1,poly_lon2/),(/poly_lat1,poly_lat1/),pres)
>>>
>>>
>>> gsn_polyline(wks,map,(/poly_lon2,poly_lon2/),(/poly_lat1,poly_lat2/),pres)
>>>
>>>
>>> gsn_polyline(wks,map,(/poly_lon1,poly_lon2/),(/poly_lat2,poly_lat2/),pres)
>>>
>>>
>>> gsn_polyline(wks,map,(/poly_lon1,poly_lon1/),(/poly_lat1,poly_lat2/),pres)
>>>
>>>    draw(map)
>>> ;   frame(wks)
>>>
>>> end
>>>
>>> --
>>> ----------------------------------------------
>>> NOAA/ESRL PSD and CU CIRES
>>> 303-497-6263
>>> http://www.esrl.noaa.gov/psd/people/cathy.smith/
>>>
>>> Emails about data/webpages may get quicker responses from emailing
>>> esrl.psd.data at noaa.gov
>>>
>>> _______________________________________________
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>>>
>>
>>
>
>
> --
>
> ---------------------------------------------------
> NOAA/ESRL PSD and CIRES CDC303-497-6263http://www.esrl.noaa.gov/psd/people/cathy.smith/
>
> Emails about data/webpages may get quicker responses from emailing
>
> esrl.psd.data at noaa.gov
>
>
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>


-- 
Adam Phillips
Associate Scientist,  Climate and Global Dynamics Division, NCAR
www.cgd.ucar.edu/staff/asphilli/   303-497-1726

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