[ncl-talk] need help to edit maps to exclude color on the ocean and contour values on land points

[Ruksana Abedin]

Hi,

I have plotted a panel of two bias maps. The plot, input files and the
script is attached. Problem is although my data is only on land points, on
the first bias map, the ocean is colored as orange, which should not be the
case. And the maps show few values of the contours on the land points
irregularly, but I do not want any values to be shown. Can you please help
me to do these two corections?

Thank you for your time and kind efforts.

Best regards,
Ruksana



begin

; read in data

f3=addfile(".........../WAH_APHRO_1998_2007_ANN_sum_precip_bias.nc", "r");
f4=addfile(".........../WAH_GPCC_1998_2007_ANN_sum_precip_bias.nc", "r");

ppt3 = f3->precip
time = f3->time
lat = f3->lat
lon = f3->lon

ppt4 = f4->precip
time = f4->time
lat = f4->lat
lon = f4->lon

wks = gsn_open_wks("eps","ppt1")
plot = new(2,graphic)

printVarSummary(ppt3)
printVarSummary(ppt4)

 gsn_define_colormap(wks,"percent_11lev")      ; choose colormap for bias
map
  ;gsn_reverse_colormap(wks)
  res                          = True
  res at gsnDraw                  = False
  res at gsnFrame                   = False
  res at cnInfoLabelOn            = False
  res at cnFillOn                 = True                 ; turn on color
  res at cnLinesOn                = False             ; turn off contour lines
  res at cnLevelSpacingF          = 0.10              ; contour interval
  res at cnFillDrawOrder          = "PreDraw"         ; draw contours first
  res at lbLabelStride            = 2                 ; stride on label bar
  res at gsnSpreadColors          = True              ; use full colormap
  res at gsnSpreadColorEnd        = -3                ; -3 don't use land color
  res at gsnAddCyclic             = False             ; regional data
  res at gsnStringFontHeightF     = 0.01
  res at tiMainString             = ""
  res at gsnRightString           = ""
  ;res at mpProjection            = "LambertConformal"
  ;res at gsnMaskLambertConformal = True
  res at gsnLeftString            = ""
  res at mpMaxLatF                = 30;max(lat)  ; zoom in on region
  res at mpMinLatF                = 15;min(lat)
  res at mpMinLonF                = 83;min(lon)
  res at mpMaxLonF                = 97; max(lon)
  res at mpCenterLonF             = 10                ; def is zero
  res at mpLandFillColor          = "Transparent"
  res at cnLevelSelectionMode= "ManualLevels"

  res at cnMinLevelValF      =  -2150.00       ;for bias maps
  res at cnMaxLevelValF      =  4450;100
  res at cnLevelSpacingF     = 150 ; 150

  res at lbLabelBarOn         = False
  res at lbLabelAutoStride   = True
  ppt3 at _FillValue    = 0.0
  ppt3 at _FillValue    = -999

plot(0) = gsn_csm_contour_map(wks,ppt3(0,:,:),res)
plot(1) = gsn_csm_contour_map(wks,ppt4(0,:,:),res)

;***********************************************************
; create panel
;***********************************************************

resP                          = True
resP at gsnFrame                 = False
resP at gsnMaximize              = True
resP at gsnPanelLabelBar         = True
resP at lbLabelFontHeightF       = 0.01
gsn_panel(wks,plot,(/2,2/),resP)          ; now draw as one plot

end
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