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Re: Amazingly accurate UTM <-> Lat/Lon transformations [message #85909 is a reply to message #85905]

Tue, 17 September 2013 11:16

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Tom Grydeland writes:

> Also anyone who uses UTM with IDL, especially if they abuse the UTM
> projection well outside its intended area (instead of switching to a
> projection more suited for large regions) should have a look at the
> Wikipedia article on UTM and its references, and try implementing these
> formulas.

Maybe it's just me, but it seems a little weird to me to claim that if
you use the software in a way that it is clearly not intended to be
used, you get bad results. Isn't this making a claim for clairvoyance on
the part of the developers?

I agree that IDL's map projection software is probably overdue for an
update. But, I'm not convinced this is any kind of a deal breaker.

Cheers,

David

P.S. For what it's worth, I, too, was confused by the initial reference
and had to spend 15 minutes or so figuring it out. That's about 14.5
minutes more than most readers of the newsgroup would have, I imagine.

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

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[Message index]

		Amazingly accurate UTM <-> Lat/Lon transformations By: tom.grydeland on Tue, 17 September 2013 01:50
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: David Fanning on Tue, 17 September 2013 11:16
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: Fabzi on Wed, 18 September 2013 02:13
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: David Fanning on Wed, 18 September 2013 06:19
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: Andy Sayer on Wed, 18 September 2013 07:20
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: tom.grydeland on Wed, 18 September 2013 02:15
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: David Fanning on Wed, 18 September 2013 06:04
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: tom.grydeland on Thu, 19 September 2013 05:40
		Re: Amazingly accurate UTM <-> Lat/Lon transformations By: David Fanning on Thu, 19 September 2013 05:47

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