Re: contour smoothing

From: David Brown <dbrown_at_nyahnyahspammersnyahnyah>
Date: Fri Oct 30 2009 - 13:06:25 MDT

Hi David,
As you have gathered from trying to find examples, these are pretty
esoteric resources that don't get much use. However, I will attempt to
come up with an example that demonstrates that they do have a
noticeable effect, or if there is some kind of bug that is preventing
them from doing what they should. One point to note is that they only
should have an effect when using the default "AreaFill" mode of
contouring. I notice that this fact is not really clear from the
documentation, so perhaps that is the problem in your case.

On Oct 30, 2009, at 10:26 AM, David B. Reusch wrote:

> Hello,
> I have a long-time-working script that uses
> gsn_csm_contour_map_polar to
> produce panelled plots of Antarctic meteo data and I've been wanting
> to
> experiment with tweaking the contouring so that basically I get a
> "smoother" look (for example, get rid of any really small areas that
> aren't particularly representative of the larger picture). Rather
> than
> approaching this by changing the cmin/cmax/cint values (which might
> also
> work, I think), I've been trying to use the cnSmoothingOn and
> cnSmoothingTensionF resources. The reason I'm writing is that these
> don't appear to be doing anything! I've tried a wide range of tension
> values with no resulting plot changes. All I've done to the script is
> add these two resources -- am I missing something else I need to get
> this to work? I didn't see any examples that address these particular
> resources (though I know there can't be examples for everything).
> I can provide the script/data if needed (I didn't attach the script
> because it's *long* and ugly). Or if someone has an example, that
> would
> be great. Also, if the prevailing wisdom is to use cmin/cmax/cint to
> accomplish such smoothing, that would be really nice to know too!
> This is NCL 5.1.1 on Mac 10.5.8.
> Thanks,
> Dave Reusch
> --
> 517 Deike Building
> Earth & Environmental Systems Institute
> Penn State University
> University Park, PA 16802
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Received on Fri Oct 30 13:06:04 2009

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