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Re: AVHRR Image Mapping Problem [message #51845 is a reply to message #51844]

Fri, 15 December 2006 09:44

Braedley
Messages: 57
Registered: September 2006

Member

> From the image, it looks like a possible off by one error, maybe in the
scaling of the GeoTiff data?
The points furthest from the center appear to have the most error, and
they are shifted away from the center point. For example, if you look
along the French Coast, the error doesn't appear to be as large because
the direction of the error is close to the line that the coast makes.

Braedley

David Fanning wrote:
> kuyper@wizard.net writes:
>
>> One thing you could check is the possibility that the standard
>> parallels are reversed: does it work better if you use -21 and +19?
>
> Humm. Well, now the upper part of the map is correct, but
> the error is transferred to the lower part of the map.
> (I just multiplied the standard parallels by minus 1.)
> Does this give you any clues?
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 10:17
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 10:13
		Re: AVHRR Image Mapping Problem By: Jean H. on Fri, 15 December 2006 09:39
		Re: AVHRR Image Mapping Problem By: Braedley on Fri, 15 December 2006 09:44
		Re: AVHRR Image Mapping Problem By: Matt[1] on Fri, 15 December 2006 09:37
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 09:29
		Re: AVHRR Image Mapping Problem By: James Kuyper on Fri, 15 December 2006 09:21
		Re: AVHRR Image Mapping Problem By: Paul Van Delst[1] on Fri, 15 December 2006 08:11
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 08:10
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 07:55
		Re: AVHRR Image Mapping Problem By: James Kuyper on Fri, 15 December 2006 10:23

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