I tried to use gsn_add_polyline but I only see my map and not the line? It
gives me no errors. Here is my code below:
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/wrf/WRFUserARW.ncl"
;load "./WRFUserARW.ncl"
begin
type="png"
wks = gsn_open_wks(type, "cx_line1") ; Open graphics file
d2 = addfile("/data2/eiserloh/data/AR/run3.1/wrfout_d02_2012-11-28_00:00:
00.nc", "r")
terr = wrf_user_getvar(d2,"HGT_M",0)
lat2 = wrf_user_getvar(d2,"XLAT",0)
lon2 = wrf_user_getvar(d2,"XLONG",0)
terr@lat2d = lat2
terr@lon2d = lon2
dom_dims = dimsizes(terr)
nx2 = dom_dims(1) - 1
ny2 = dom_dims(0) - 1
res = True
; Set some contouring resources.
res@cnFillOn = True
res@cnLinesOn = False
res@cnLineLabelsOn = False
res@cnInfoLabelOn = False
res@gsnSpreadColors = True
res@cnLevelSelectionMode = "ExplicitLevels"
res@cnLevels = (/0, 10, 25, 50, 75, 125, 200, 350, 500, 750, \
1000, 1250, 1500, 1750, 2000, 2250, 3000/)
res@gsnLeftString = ""
res@gsnRightString = ""
res@gsnDraw = False
res@gsnFrame = False
; Add map resources
res@mpDataBaseVersion = "MediumRes" ; Default is LowRes
res@mpOutlineDrawOrder = "PostDraw" ; Draw map outlines last
res@mpGridAndLimbOn = True ; Turn off lat/lon lines
res@mpGridLatSpacingF = 5.0
res@mpGridLonSpacingF = 5.0
res@mpGridLineColor = "gray"
res@mpGridLineDashPattern = 11
res@pmTickMarkDisplayMode = "Always" ; Turn on map tickmarks
res = set_mp_wrf_map_resources(d2,res)
res@mpLimitMode = "Corners" ; Portion of map to zoom
res@mpLeftCornerLatF = lat2(0,0)
res@mpLeftCornerLonF = lon2(0,0)
res@mpRightCornerLatF = lat2(ny2,nx2)
res@mpRightCornerLonF = lon2(ny2,nx2)
res@tmXTLabelFontHeightF = 0.012
res@tmXBLabelFontHeightF = 0.012
res@tmYLLabelFontHeightF = 0.012
res@tmXTLabelFontHeightF = 0.012
; Add label bar resources
res@lbLabelAutoStride = True
res@gsnMaximize = True ; Maximize plot in frame
res@pmLabelBarOrthogonalPosF = -0.01
res@pmLabelBarHeightF = 0.08
res@lbLabelFontHeightF = 0.01
res@lbTitleOn = True
res@lbTitlePosition = "top"
res@lbTitleString = "Elevation (m)"
res@lbTitleFontHeightF = 0.01
res@lbTopMarginF = 0.17
res@lbTitleOffsetF = 0.01
; we need these to later draw boxes for the location of the nest domain
lnres = True
lnres@gsLineThicknessF = 3.0
lnres@gsLineColor="black"
; make images
map = gsn_csm_contour_map(wks, terr, res)
;get point A and B
pt_a = wrf_user_ll_to_ij(d2,-126.0,42.0,True)
pt_b = wrf_user_ll_to_ij(d2,-121.5,34.9,True)
xpts=(/ pt_a(0), pt_b(0) /)
ypts=(/ pt_a(1), pt_b(1) /)
dum=new(1,graphic) ;must create dummy
dum(0)=gsn_add_polyline(wks,map,xpts,ypts,lnres)
draw(map)
frame(wks)
end
On Wed, Dec 11, 2013 at 3:55 PM, Dennis Shea <shea@ucar.edu> wrote:
> Please look at examples.
>
> http://www.ncl.ucar.edu/Applications/
>
> Search/Look for something with "lines" ==> Polylines
>
> Click
>
> http://www.ncl.ucar.edu/Applications/polyg.shtml
> Example 4
> Example 14
>
>
>
>
>
> On 12/11/13, 4:42 PM, A.J. Eiserloh wrote:
>
>> What is the easiest way to plot a line onto a gsn_csm_contour_map() ? I
>> have 2 points and I would like to just draw a line through those points.
>>
>>
>>
>>
>> _______________________________________________
>> ncl-talk mailing list
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
-- Arthur J. Eiserloh, Jr. San Jose State University Graduate Student Dept. of Meteorology and Climate Science
_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Wed Dec 11 17:14:58 2013
This archive was generated by hypermail 2.1.8 : Fri Dec 13 2013 - 11:39:30 MST