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Re: AVHRR Image Mapping Problem [message #51984 is a reply to message #51852]

Fri, 15 December 2006 13:19

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Matt wrote:
> There is no right and wrong standard parallels. The standard parallels

In this context, there is such a thing as the "right" standard
parallels. The TIFF file was created using a particular map projection,
and the parallels of that map projection are the ones that you have to
use to interpret the raw data correctly.

> Raster data in Albers centered on Africa
> Vector data for the world in some other projection, probably centered
> on the prime meridian

I would guess that the vector data is stored as latitude and longitude,
and converted automatically to the current projection. The vector data
could be inaccurate, but the more plausible assumption is that the real
parameters of the Albers projection used to create the raster data are
different from the documented values of those parameters; that's the
possibility I was trying to explore.

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[Message index]

		AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 07:42
		Re: AVHRR Image Mapping Problem By: David Fanning on Wed, 20 December 2006 05:52
		Re: AVHRR Image Mapping Problem By: peter.albert@gmx.de on Wed, 20 December 2006 23:55
		Re: AVHRR Image Mapping Problem By: wita on Tue, 19 December 2006 23:49
		Re: AVHRR Image Mapping Problem By: David Fanning on Sun, 17 December 2006 20:47
		Re: AVHRR Image Mapping Problem By: Richard French on Sun, 17 December 2006 20:11
		Re: AVHRR Image Mapping Problem By: James Kuyper on Sun, 17 December 2006 20:05
		Re: AVHRR Image Mapping Problem By: George N. White III on Thu, 28 December 2006 07:03
		Re: AVHRR Image Mapping Problem By: Richard French on Sun, 17 December 2006 18:46
		Re: AVHRR Image Mapping Problem By: David Fanning on Sun, 17 December 2006 12:36
		Re: AVHRR Image Mapping Problem By: Chris[2] on Sun, 17 December 2006 12:11
		Re: AVHRR Image Mapping Problem By: David Fanning on Sat, 16 December 2006 07:13
		Re: AVHRR Image Mapping Problem By: Chris[2] on Fri, 15 December 2006 21:43
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 17:45
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 13:46
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 13:42
		Re: AVHRR Image Mapping Problem By: James Kuyper on Fri, 15 December 2006 13:19
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 12:33
		Re: AVHRR Image Mapping Problem By: Matt[1] on Fri, 15 December 2006 12:07
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 11:33
		Re: AVHRR Image Mapping Problem By: Bob[3] on Fri, 15 December 2006 11:21
		Re: AVHRR Image Mapping Problem By: Matt[1] on Fri, 15 December 2006 11:21
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 15 December 2006 10:50
		Re: AVHRR Image Mapping Problem By: David Fanning on Mon, 25 December 2006 21:55
		Re: AVHRR Image Mapping Problem By: David Fanning on Mon, 25 December 2006 12:27
		Re: AVHRR Image Mapping Problem By: David Fanning on Sun, 24 December 2006 11:01
		Re: AVHRR Image Mapping Problem By: Richard French on Sun, 24 December 2006 10:50
		Re: AVHRR Image Mapping Problem By: David Fanning on Sun, 24 December 2006 10:03
		Re: AVHRR Image Mapping Problem By: Chris[2] on Sat, 23 December 2006 17:31
		Re: AVHRR Image Mapping Problem By: James Kuyper on Fri, 22 December 2006 07:47
		Re: AVHRR Image Mapping Problem By: David Fanning on Fri, 22 December 2006 07:01

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