[Ferret] contour/overlay draws extra, unwanted horizontal line

[zhen.li@xxxxxxxxxxxxx]

Hi ferret users;

I found that contour/overlay draws extra, unwanted horizontal line, when 
it's used with the fill
routine. The extra line doesn't show up in the screen display. Only when 
the screen display is saved
with "frame/file=depth_20_7985.gif", the extra, unwanted horizontal line 
shows up.

Here is my script:

use ts_7985
let depth=temp[z=@loc:20];
fill/y=20s:20n/x=165w/LEVELS="(60,260,20)" depth
contour/y=20s:20n/x=165w/spacing=0.8/LEVELS="(60,260,20) DASH(60,140,20)" 
depth

The extra line shows up whenever the contour/overlay is called, so I end up 
having
three extra horizontal lines when using the following script. Maybe I 
didn't use the
contour/overlay routine properly. Do you know what went wrong?

contour/Z=0:450/x=165W/y=0/LEVELS=(8,30,2) temp
contour/over/Z=0:450/x=165W/y=0/LEVELS="(9) DASH(9)" temp
contour/over/Z=0:450/x=165W/y=0/LEVELS="(27) DASH(27)" temp
contour/over/Z=0:450/x=165W/y=0/LEVELS="(29) DASH(29)" temp

Thanks!

Zhen


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