ncl极地投影经纬度如何设置？

xzz

求助问经纬度的°如何添加上去呀

LeslieTse

使用drawNDCGrid(wks)画出NDC坐标，然后用根据NDC坐标使用gsn_text_ndc添加经度文本，坐标自己慢慢微调，画好了再把drawNDCGrid(wks)去掉即可。参考如下：
drawNDCGrid(wks)
txres                       = True
txres@txFontHeightF = 0.013
gsn_text_ndc(wks, "0~F34~0", 0.5, 0.963, txres)
gsn_text_ndc(wks, "60~F34~0~F21~E", 0.37, 0.895, txres)
gsn_text_ndc(wks, "120~F34~0~F21~E", 0.365, 0.77, txres)
gsn_text_ndc(wks, "180~F34~0", 0.5, 0.702, txres)
gsn_text_ndc(wks, "120~F34~0~F21~W", 0.635, 0.77, txres)
gsn_text_ndc(wks, "60~F34~0~F21~W", 0.63, 0.895, txres)

LeslieTse

经纬度网格及标签间隔度数可利用如下几个Resources:
res@gsnPolarLabelSpacing  = 60.
res@mpGridLatSpacingF     = 30.
res@mpGridLonSpacingF     = 60.
res@mpGridPolarLonSpacingF= 0.

xzz

谢谢，但是我为什么不能将两张图叠在一起
begin


f = addfile("F:/data/data100-11m-12m.nc", "r")


h=f->z(1,:,:)
;h1=h(:,:)/9.8
;copy_VarMeta(h, h1)
;h1@units="gpm"


wks  = gsn_open_wks("png","100-4")


  res            = True ; plot mods desired


  res@cnLevelSelectionMode = "ManualLevels"   ; set manual contour levels


  res@cnMinLevelValF       = 17000.                ; set min contour level
  res@cnMaxLevelValF       = 10000.                ; set max contour level
  res@cnLevelSpacingF      =  40               ; set contour spacing


  res@tiMainString       = " "       ; plot title
  res@gnsRightString     = " "
  res@gsnLeftString      = " "                           
  res@mpMinLatF   = 40
  res@gsnPolar   = "NH"  ; specify the hemisphere  


  
plot = gsn_csm_contour_map(wks,h,res)   
   
drawNDCGrid(wks)
txres                       = True
txres@txFontHeightF = 0.015
gsn_text_ndc(wks, "0~F34~0", 0.5, 0.99, txres)
gsn_text_ndc(wks, "90~F34~0~F21~E", 0.02,0.5,  txres)


gsn_text_ndc(wks, "180~F34~0", 0.5, 0.01, txres)
gsn_text_ndc(wks, "90~F34~0~F21~W", 0.98,0.5, txres)




frame (wks)


end