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Re: create an UTM grid [message #78409]

Mon, 28 November 2011 14:35

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

nata writes:

> UTM is a cartesian coordinate system. Theoretically, the distance
> between two points on the grid could be performed using the
> Pythagorean theorem (because all distances should be equal). What I
> realize is that the distances are different and never equal to 1km. I
> checked that using the routine MAP_2POINTS. Do you know why ?

I think mostly because you are not following my advice
exactly. ;-)

In my grids, the distances are *exactly* 1000 meters apart.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 14:35
		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 14:33
		Re: create an UTM grid By: natha on Mon, 28 November 2011 12:02
		Re: create an UTM grid By: natha on Mon, 28 November 2011 11:25
		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 10:12
		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 14:38

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