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画等值线图,代码如下:
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
begin
T =addfile("sst.mnmean.nc", "r")
time =T->time
size =dimsizes(time)-1
sst =T->sst(size,:,:)
lat =T->lat
lon =T->lon
sst!0 ="lat"
sst!1 ="lon"
sst@nlon =dimsizes(sst&lon)
sst@nlat =dimsizes(sst&lat)
wks =gsn_open_wks("x11", "sst")
resources =True
resources@sfXCStartV =120
resources@sfXCEndV =300
resources@sfYCStartV =30
resources@sfYCEndV =-30
getvalues wks
"wkColorMap" :cmap
end getvalues
cmap(0,:) =(/1.,1.,1./)
cmap(1,:) =(/0.,0.,0./)
resources@mpCenterLonF =210
resources@cnLevelSelectionMode ="ManualLevels"
resources@cnMinLevelValF =18
resources@cnMaxLevelValF =30
resources@cnLevelSpacingF =1
resources@cnFillOn =True
resources@mpLimitMode ="LatLon"
resources@mpMinLonF =120
resources@mpMaxLonF =300
resources@mpMinLatF =-30
resources@mpMaxLatF =30
resources@mpPerimOn = True
resources@cnLinesOn = False
map =gsn_csm_contour_map(wks,sst,resources)
end
代码中规定了地图的界限为经度120到300,纬度南北30度,但实际中画出的图标签上虽然是规定的界限,但是生成的图仍然是全球范围的图,求解是为什么?
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