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Re: Interpolation on a sphere [message #2925]

Sun, 09 October 1994 05:53

cooper
Messages: 1
Registered: October 1994

Junior Member

> In article <373pgv$gv@danberg.llnl.gov>, dan@danberg.llnl.gov (Dan Bergmann) writes:
> |>
> |> Using [simple interpolation], 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.

How about copying data near longitudes 0 and 360 (or 180 E and
180 W, of course) to "ghost" zones _above_ 360 and _below_ 0?
That is, map longitude = 0-2 (or whatever) onto longitude 360-362,
and 358-360 onto (-2)-0. Then interpolate as usual; then strip
off the ghost zones before using the result.

It isn't a pretty solution, but I thought it might work...

Glenn Cooper

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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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