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Re: Gridding-Interpolation of satellite data [message #38120]

Mon, 23 February 2004 12:43

mmccabe
Messages: 4
Registered: May 2003

Junior Member

Ben Tupper <btupper@bigelow.org> wrote in message news:<c1d1ad$1e5jka$1@ID-189398.news.uni-berlin.de>...

> I think you want to look into the FAULT_POLYGONS and FAULT_XY keywords.
> You should be getting rid of the missing data, before using
> GRIDDATA, by using the GRID_INPUT routine with the EXCLUDE keyword set
> to the indices of you NODATA values.
>
> Ben

Thanks guys (although MISSING wasn't my only problem). GRID_INPUT
certainly assisted, but the trick (as you suggested) was just to get
rid of the missing data completely before doing the triangulation,
using a simple search. I was able to get rid of most of the 'edge'
effects using combinations of SEARCH_ELLIPSE, SECTOR and
EMPTY_SECTORS. The result wasn't too bad. I wanted to affect the data
as little as possible - so limiting the amount of interpolation was a
priority.

Thanks to Dan Bergman for a funky little bit of code from way back in
1994!!! that I found in a posting. This is an intuitive (in that I can
actually read and understand what it is doing) approach to
interpolation - allowed me to customise for my own particular needs.

Cheers,
Matt

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[Message index]

		Re: Gridding-Interpolation of satellite data By: mmccabe on Mon, 23 February 2004 12:43
		Re: Gridding-Interpolation of satellite data By: btt on Mon, 23 February 2004 06:05
		Re: Gridding-Interpolation of satellite data By: David Fanning on Sat, 21 February 2004 16:52
		Re: Gridding-Interpolation of satellite data By: eoraptor on Tue, 24 February 2004 20:26

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