[ncl-talk] Strange stippling behaviour when valid points are few and scattered apart

[Rashed Mahmood]

Hi NCL,

I encountered strange stippling behaviour when valid data points are very
few and are scattered apart from each other. At best I would expect no
stippling overlaid on a filled map, however, it seems that NCL somehow
covers the whole map with stippling.

To explain this, I created a small example script (attached) which reads
data from the attached file. To play with it a bit, I just added some "fake
data" to see what happens. In the script we could set it using
"add_bogus_data = True".
Attached are two plots after using original data and adding some fake data.
I am not sure what is going on here, anyone? Ignore the file names!!

Cheers
Rashed
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