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Map Projections like Matrices [message #79835]

Fri, 06 April 2012 14:00

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

One of the reasons I feel weary today is that map projections
are just like matrices when you are working in projected
meter space.

You set them up by specifying a limit like this:

limit = [latmin, lonmin, latmax, lonmax]

But, the uv_box that contains the projected XY
values of this limit (at least, it is *suppose*
to, but doesn't, the source of much frustration
today) is set up like this:

uv_box = [lonmin, latmin, lonmax, latmax]

Sheesh! Keeping it straight is enough to drive
you to drink, which, come to think of it....it
*is* Friday!

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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Map Projections like Matrices

By: David Fanning on Fri, 06 April 2012 14:00

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