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Re: Interpolation on a sphere [message #2932 is a reply to message #2929]

Fri, 07 October 1994 08:29

dan
Messages: 27
Registered: March 1993

Junior Member

In article <372kp6$54d@news.mic.ucla.edu>, todd@artemis.ess.ucla.edu (Todd Ratcliff) writes:
|> Dan,
|>
|> If you just want to see your data wrapped onto a sphere you can
|> simply interpolate your data into a 180X360 array using whatever
|> interpolation that you normally use, generate a

Using this method, a data value at longitude=0 latitude=89 will have
very little influence on the interpolated value at longitude=180 latitude=89,
but in reality, these points are right next to each other. I'm not so interested
in viewing my data as I am in doing a good interpolation on the surface of
a sphere.

|> spherical polygon (PV~Wave has Poly_Sphere and I've seen an IDL
|> routine called Mesh_Obj by Dan Carr which can do the same thing)
|> with 180 polygons around equator and 360 polygons around the
|> meridian then use polyshade with the Shades=Bytscl(your_array)
|> keyword.
|>
|> You'll have your data on sphere.
|>
|>
|> Todd
--
************************************************************ ***
** Dan Bergmann dbergmann@llnl.gov **
** Global Climate Research fax (510) 422-5844 **
** Lawrence Livermore National Lab human (510) 423-6765 **

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[Message index]

		Re: Interpolation on a sphere By: cooper on Sun, 09 October 1994 05:53
		Re: Interpolation on a sphere By: todd on Fri, 07 October 1994 16:54
		Re: Interpolation on a sphere By: dan on Fri, 07 October 1994 08:29
		Re: Interpolation on a sphere By: todd on Thu, 06 October 1994 22:02

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