load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"

begin
;---Generate some dummy data.
  data1 = generate_2d_array(10, 12, -20., 17., 0, (/129,129/))

  wks = gsn_open_wks("x11","panel_ex")   ; Open X11 window
  gsn_define_colormap(wks,"testcmap")    ; Change colormap

;---Set up resources.
  res                     = True
  res@gsnMaximize         = True        ; Maximize plot in frame
  res@cnFillOn            = True        ; Turn on contour fill
  res@cnLinesOn           = False       ; Turn off contour lines

  plot = gsn_csm_contour(wks,data1,res)  ; Create and draw contours
end