map grid lines problem

Dear Mary,

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
wks = gsn_open_wks("ps","test_grid")
res = True
res@mpProjection = "Mercator"
res@mpLimitMode = "LatLon"
res@mpMinLonF = 11.
res@mpMaxLonF = 12.
res@mpMinLatF = 33.
res@mpMaxLatF = 34.
;res@mpMinLatF = 33.2667
;res@mpMaxLatF = 33.9333
res@pmTickMarkDisplayMode = "Always"
res@mpGridAndLimbOn = True
res@mpGridLonSpacingF = 1./60.
res@mpGridLatSpacingF = 1./60.
res@tmXTOn = True
res@tmYROn = True
plot = gsn_csm_map(wks,res)

Everything is fine, thank you.
 
However, if we uncomment two lines (mpMinLatF = 33.2667 and mpMaxLatF =
33.9333) then the vertical(!) grid lines disappear.

NCAR Command Language Version 5.2.0, Cygwin

Examples are
http://gnoo.bo.ingv.it/webdev/lyubartsev/tests/test_grid_good.png
and http://gnoo.bo.ingv.it/webdev/lyubartsev/tests/test_grid_bad.png

Best regards,
Slava

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Received on Mon Feb 28 08:22:23 2011