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Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) [message #24782 is a reply to message #24779]

Fri, 20 April 2001 15:44

Ben Tupper
Messages: 186
Registered: August 1999

Senior Member

James Kuyper wrote:

> Ben Tupper wrote:
> ...
>> IDL's TRIGRID routine interpolates out to the limits of the 'outer-hull'
>> defined by the Delaunay triangulation. The curviness of the data swath
>> (almost banana-shaped) has introduced a subtle concavity. There is a triangle
>
> This data set sounds familiar to me. Is it MODIS data from the Terra
> satellite? If so, then I'm the one responsible for the program that
> generates the geolocation information Liam's using. In that case, it's
> not really a banana shape. Seen in a proper 3-D context, without map
> distortion, it's actually a bow-tie shape - the edges are actually arcs
> of what in spherical geometry are called "small" circles: they have

> radii of less than 90 degrees, bending inward.

Aha! A hyper-banana!

Ben

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[Message index]

		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: Ben Tupper on Sat, 21 April 2001 17:28
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: Ben Tupper on Fri, 20 April 2001 15:44
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: James Kuyper on Fri, 20 April 2001 15:26
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: Liam E. Gumley on Fri, 20 April 2001 12:46
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: James Kuyper on Fri, 20 April 2001 08:04
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: Ben Tupper on Thu, 19 April 2001 19:08
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: Kenneth P. Bowman on Thu, 19 April 2001 17:16
		Re: TRIANGULATE/TRIGRID problem in IDL 5.3 (SGI) By: Craig Markwardt on Thu, 19 April 2001 13:12

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