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Re: shifted .kml created with IDL [message #81041 is a reply to message #80955]

Tue, 31 July 2012 09:36

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> I'm not sure if these are the *centers* of the corner
> pixels or the outside edge. I would probably get this
> information directly from the GeoTiff file. If you did,
> you would be getting the outside edge boundaries.
>
> In other words, you can get this information from the
> GeoTiff structure using tie points, the scale in the
> X and Y direction, and the size of the image. All info
> that is available for the GeoTiff file:
>
> http://www.idlcoyote.com/map_tips/pixel_to_ll.html

All this boundary information is more easily obtained
with the Coyote Library routine FindMapBoundary, of course:

void = FindMapBoundary(geoTiffFile, b, XRANGE=xr, YRANGE=yr)

The boundary is in the variable b. Or you can use the ranges.
Same numbers, just presented differently, depending on what
you need.

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]

		shifted .kml created with IDL By: titan on Mon, 30 July 2012 05:25
		Re: shifted .kml created with IDL By: titan on Fri, 03 August 2012 06:21
		Re: shifted .kml created with IDL By: David Fanning on Thu, 02 August 2012 14:33
		Re: shifted .kml created with IDL By: titan on Thu, 02 August 2012 00:00
		Re: shifted .kml created with IDL By: David Fanning on Tue, 31 July 2012 09:36
		Re: shifted .kml created with IDL By: David Fanning on Tue, 31 July 2012 09:30
		Re: shifted .kml created with IDL By: titan on Tue, 31 July 2012 07:51
		Re: shifted .kml created with IDL By: David Fanning on Tue, 31 July 2012 04:56
		Re: shifted .kml created with IDL By: titan on Tue, 31 July 2012 00:09

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