# [ncl-talk] Problem with contour map shading

Priyanka Silva priyankakeraminiya6 at gmail.com
Thu Apr 20 01:26:30 MDT 2017

```Hi all,

I want to shade the areas exceeding 95% confidence level in my correlation
plot only for the ocean, but when I plot I could see the shading on the
land too. How can I remove the shading on the land?

My script and plot are as follows.

Thank you.

begin

;*******************************************************************************

;Seasonal mean precipitation averaged over the domain

;*****************************************************************************

f    = "mon.precip.nc"

time = fin->time

ymd = cd_calendar(time,2)

iTim = ind (ymd.ge.19790101.and.ymd.lt.20130101)

preci = fin->precip(iTim,{6:10},{79:82})

;printVarSummary(precip)

;-------------------------------------------------------------------------

p = month_to_season(preci,"JJA")

printVarSummary(p)

;--------------------------------------------------------------------------

index =dim_avg_Wrap (dim_avg_Wrap (p (time|:,lat|:,lon|:)))

printVarSummary(index)

;************************************************************************

; correlation between the precipitation and the global SST

;************************************************************************

time1 = fin1->time

ymd1 = cd_calendar(time1,2)

iTim1 = ind (ymd1.ge.19790101.and.ymd1.lt.20130101)

sst = fin1->sst(iTim1,:,:)

;;------------------------------------------------------------------------

s = month_to_season(sst,"JJA")

;printVarSummary(s)

;-------------------------------------------------------------------------

ccr = escorc(index,s(latitude|:,longitude|:,time|:))

copy_VarCoords(sst(0,:,:),ccr)

printVarSummary(ccr)

;------------------------------------------------------------------------

siglvl = 0.05

Prob = rtest(ccr(latitude|:,longitude|:),34,0)

Prob!0 = "lat"

Prob!1 = "lon"

Prob&lat = ccr&latitude

Prob&lon = ccr&longitude

printVarSummary(Prob)

;-------------------------------------------------------------------------

wks  = gsn_open_wks("x11","Correlation")

gsn_define_colormap(wks,"BlWhRe")

;-------------------------------------------------------------------------

res                      = True

res at cnFillOn             = True

res at cnLinesOn            = False

res at cnLevelSelectionMode = "ManualLevels"

res at cnMinLevelValF       = -.8

res at cnMaxLevelValF       =  .8

res at cnLevelSpacingF      = 0.1

res at mpPerimOn = False

res at mpCenterLonF =180

res at tiMainString = ""

res at gsnLeftString         = "JJA"

res at mpFillOn  = False

res at gsnDraw = False

res at gsnFrame = False

;------------------------------------------------------------------------

res1 = True

res1 at gsnDraw = False

res1 at gsnFrame = False

res1 at cnLevelSelectionMode = "ManualLevels"

res1 at cnMinLevelValF = 0.00

res1 at cnMaxLevelValF = 1.05

res1 at cnLevelSpacingF = 0.05

res1 at cnInfoLabelOn = False

res1 at cnLinesOn = False

res1 at cnLineLabelsOn = False

res1 at cnFillScaleF = 0.6 ; add extra density

res1 at mpLandFillColor ="gray"

;-----------------------------------------------------------------------------

plot = gsn_csm_contour_map(wks,ccr,res)

opt = True

opt at gsnShadeFillType = "pattern"       ; pattern fill

opt at gsnShadeLow = 17                   ; use pattern 17

plot1 = gsn_csm_contour(wks,Prob, res1)

overlay (plot, plot1)

draw(plot)

frame (wks)

end

[image: Inline image 1]
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20170420/e6c40c78/attachment.html
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 97171 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20170420/e6c40c78/attachment.png
```