;================================================;
;  maponly_2.ncl
;================================================;
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"   
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"   
; ================================================;
begin

  wks  = gsn_open_wks("ps","maponly")            ; open a ps file


  res                             = True
  res@mpFillOn                    = False        ; turn off gray fill
  res@mpOutlineBoundarySets       = "National"   ; turn on country boundaries
  res@mpGeophysicalLineColor      = "Navy"       ; color of cont. outlines
  res@mpGeophysicalLineThicknessF = 1.5          ; thickness of outlines

  res@mpMaxLatF                   = 30           ; choose subregion           
  res@mpMinLatF                   = -50
  res@mpMaxLonF                   = 160
  res@mpMinLonF                   = 90
  plot = gsn_csm_map_ce(wks,res)                 ; draw map

  end