[vtkusers] Delaunay3D -- Statistical Analysis of Mesh?

[Stewart.Dickson at noaa.gov]

Kevin,

Thanks for the reply.

I am checking with the Domain Experts at this moment -- but, I expect that
you are correct.  The aspect ratio of the data is very flat -- because it is
the Troposphere -- the height is on the order of 30,000-70,000 feet
(6-12 miles), while the width of the data is on the order of 300 miles.

I suppose that the solution would be to pre-scale the vertical axis by ~50
before triangulation, then flatten it back again afterward?

Thanks,

-Stewart    http://us.imdb.com/Name?Stewart+Dickson
http://www.cs.unca.edu/~dickson
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On Tue, 2006-02-07 at 09:36 -0500, Stewart.Dickson at noaa.gov wrote:
> What does one do when one has 860,000  points on the range (-194742,
> -104476, 11.), (246342, 189827, 3900)?

I can't add.

octave:2> [194742,-104476, 11.]-[246342, 189827, 3900]
ans =

   -51600  -294303    -3889

So your ranges are vastly different in x, y, and z. Does this mean that
the distances between points are vastly different in the three
directions?  So different that an alpha large enough to bridge the
smallest Dy will bridge the largest Dz?  If that's the case, then a
single radius will have trouble.