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Re: Convert pixel coordinates to LAT/LON [message #58272]

Fri, 25 January 2008 06:10

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Gary writes:

> Thanks for the guidance. Is there a projection that can be used for a
> radar image? Some sort of projection that lays out a radial pattern
> from a given lat/lon? I think that's what I need.

I think what I would do is use a UTM map projection.
It is simple enough to find out what zone your
radar is in. (Just use the longitude to determine
zone.) Put the center of the UTM projection at 0,0,
which would then correspond to your center lat/lon.
The extent of the UTM would be the range of the radar.
The resolution you can determine from image actual image.
The resolution/range = scale.

Once all of that is known, you could make arrays of
latitude and longitude for all your pixels, as in this
article:

http://www.dfanning.com/map_tips/pixel_to_ll.html

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: Convert pixel coordinates to LAT/LON By: David Fanning on Fri, 25 January 2008 06:10
		Re: Convert pixel coordinates to LAT/LON By: David Fanning on Thu, 24 January 2008 11:59
		Re: Convert pixel coordinates to LAT/LON By: Gary on Thu, 24 January 2008 11:05
		Re: Convert pixel coordinates to LAT/LON By: David Fanning on Thu, 24 January 2008 10:38

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