请问各位大神怎么只显示中国区域，底图上一直有世界地图，数据和地图不匹配

编程菜鸟

ncl小白，画图的时候数据是华北地区的数据，但是被放在了世界地图上，经纬度也不好调整

kkwo

res@mpDataSetName           = "Earth..4"
res@mpAreaMaskingOn         = True
res@mpMaskAreaSpecifiers    = (/"China","Taiwan","Disputed area between India and China","India:Arunachal Pradesh"/)
res@mpLandFillColor         = "white"
res@mpInlandWaterFillColor  = "white"
res@mpOceanFillColor        = "white"
res@mpOutlineBoundarySets   = "NoBoundaries"

编程菜鸟

begin
  filein=addfile("D:\CN05.1\2019\CN05.1_Pre_2019_month_025x025.nc","r")
  t=filein->time
  t@units="hours since 1961-01-01 00:00:00"
  date=cd_calendar(t,0)
  year=date(:,0)
  month=date(:,1)
  js=filein->pre
  js@_FillValue = js@missing_value
  jsa=new((/163,283/),float)
  jsa=(js(3,:,:)+js(4,:,:)+js(5,:,:))
  js1=jsa(69:109,161:201)
  lon=filein->lon(161:201)
  lon@units = "degrees_north"
  lat=filein->lat(69:109)
  lat@units = "degrees_east"
  fill_areas=(/"China:states"/)
  wks = gsn_open_wks("png","premam")
  gsn_define_colormap(wks,"rainbow")   
  res=Trueres@mpOutlineSpecifiers   = (/"China:states","Taiwan"/)       ;China:states
  res@mpDataBaseVersion="MediumRes"
  res@mpDataSetName="Earth..4"             ;包含中国省界
  res@cnFillOn    = True                        ; turn on color fill
  res@cnLinesOn   = False                       ; turn off the contour lines
  res@cnLineLabelsOn = False                    ; turn the line labels off
  ;js1=jsa(69:109,161:201)
  res@tiMainString="HUABEIpre_MAM"
  plot=gsn_csm_contour_map(wks,js1,res)
end


这是脚本

柠檬想吃鱼罐头

res@mpAreaMaskingOn = True
res@mpMaskAreaSpecifiers = (/"China","Taiwan","Arunachal Pradesh","Disputed area between India and China"/)
res@mpFillDrawOrder = "PostDraw"