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weird contour lines [message #68484]

Sat, 31 October 2009 08:32

Libo Wang
Messages: 6
Registered: October 2009

Junior Member

Hi, I used the following code to set up a stereographic projection map
and overplot NCEP pressure field on it:

MAP_SET,/stereographic, 60, -105,color=grey,limit=[30,-180,80.0,-10],/
continents,/isotropic
levels = 16
step=4
userLevels = IndGen(levels) * step + 120
Contour, data,lon,lat,C_Colors=black,Levels=userLevels, /overplot
Contour, data,lon,lat,/Overplot,
Levels=userLevels,c_colors=black,c_charthick=2,$
max_value=200,min_value=120,/Follow

However, I got weird contour lines, which you could take a look at the
following link:
http://picasaweb.google.com/libowa/DropBox?feat=directlink

Could you point out what was wrong in my codes? How could I get smooth
contour lines?

Thanks,
Libo

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