Dear NCl users..,
I'm getting error while coding wind vectors using NCEP data.
I'm attaching the code.
begin
u = addfile("/CMAP/WIND/uwnd.mon.mean.nc","r")
v = addfile("/CMAP/WIND/vwnd.mon.mean.nc","r")
U = u->uwnd(:,:,:,:)
V = v->vwnd(:,:,:,:)
wks = gsn_open_wks("ps","windpattern_cmap") ; open ps file
gsn_define_colormap(wks,"BlAqGrYeOrReVi200") ; choose color map
i = NhlNewColor(wks,0.8,0.8,0.8) ; add gray to colors
res = True ; plot mods
desired
res@gsnSpreadColors = True ; use full colormap
res@gsnSpreadColorEnd = -2 ; don't use added gray
res@lbOrientation = "vertical" ; vertical label bar
res@tiMainString = "Windpattern"
res@vcRefMagnitudeF = 5.0 ; make vectors larger
res@vcRefLengthF = 0.005 ; ref vec length
res@vcMinDistanceF = 0.017 ; thin out windbarbs
res@vcGlyphStyle = "WindBarb" ; choose wind barbs
res@vcMonoWindBarbColor = False ; color barbs by scalar
res@vcWindBarbTickLengthF = 0.3 ; length of the barb tick
res@vcWindBarbTickSpacingF = 0.3 ; distance between ticks
; zoom in on map
minlat = -20
maxlat = 40
minlon = 40
maxlon = 120
res@mpMinLatF = minlat
res@mpMaxLatF = maxlat
res@mpMinLonF = minlon
res@mpMaxLonF = maxlon
;******************************************************
; Plot wind barb
;******************************************************
plot=gsn_csm_vector_map_ce(wks,U(653,3,:,:),V(653,3,:,:),res)
end
I want to plot winds at 2002 june....so converted time using *ut_calenda*r
function and i got it is :653 and level is 850 hpa -->3
thus U(653,3,:,:) and V(653,3,:,:). I hope the calculation is correct.
The error am getting is:
fatal:VectorPlotDraw: VVECTR - VECTOR NDC LENGTH TOO GREAT
fatal:VectorPlotDraw: error drawing vectors
fatal:VectorPlotDraw: draw error
fatal:PlotManagerDraw: error in plot draw
fatal:_NhlPlotManagerDraw: Draw error
Thanks in advance
--
*********************************************************************
A.R.Ragi
M.Tech Atmospheric science
Department of Atmospheric science
Cochin University of Science and Technology
Email : ar.ragi@gmail.com
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"I want to know how God created this world.I am not interested in this or
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Received on Mon Mar 8 01:13:14 2010
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