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Re: Retrieve pixel values from GeoTIFF [message #73786 is a reply to message #73785]

Sat, 27 November 2010 12:52

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

mankoff writes:

> David: I've also tried using your GeoCoord object, and can display the
> graphic and coastlines just fine, but again, am stuck at the step of
> "convert (lon,lat)=(-100,-75) to (x,y) for indexing into the original
> TIF".

mapCoord = GeoCoord('mygeotiff_file.tif')
mapStruct = mapCoord -> GetMapStructure()
xy = Map_Proj_Forward(lon,lat, Map_Structure=mapStruct)
x = xy[0]
y = xy[1]

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: Retrieve pixel values from GeoTIFF By: David Fanning on Sat, 27 November 2010 13:03
		Re: Retrieve pixel values from GeoTIFF By: David Fanning on Sat, 27 November 2010 12:59
		Re: Retrieve pixel values from GeoTIFF By: David Fanning on Sat, 27 November 2010 12:52
		Re: Retrieve pixel values from GeoTIFF By: mankoff on Sat, 27 November 2010 12:45
		Re: Retrieve pixel values from GeoTIFF By: David Fanning on Sat, 27 November 2010 12:13
		Re: Retrieve pixel values from GeoTIFF By: penteado on Sat, 27 November 2010 12:06

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