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Re: Tasselated Cap in IDL? [message #81222 is a reply to message #81191]

Tue, 28 August 2012 23:09

Yngvar Larsen
Messages: 134
Registered: January 2010

Senior Member

On Monday, 20 August 2012 18:59:19 UTC+2, Coyote wrote:
> Folks,
> Has anyone implemented a Tasselated Cap algorithm for LandSat data in IDL? I realize this exists in ENVI, but I am looking for an IDL-only solution.

Sorry for late answer, but since nobody answered yet... (Though likely you already resolved this by yourself, since Google knows the answer.)

Not sure what your actual problem is? The Tasseled Cap transformation is just a linear combination of (a selection of) the bands of a multispectral imager. So the actual IDL code would be something you literally implement in 2 minutes. So I guess you are looking for the weights to use? That of course depends on which Landsat data you have.

For Landsat TM and the older Landsat MSS, there is a useful summary here: http://www.sjsu.edu/faculty/watkins/tassel.htm

For Landsat 7 ETM+, you can try Table 2 in the following document:
http://landcover.usgs.gov/pdf/tasseled.pdf

--
Yngvar

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		Tasselated Cap in IDL? By: DavidF[1] on Mon, 20 August 2012 09:59
		Re: Tasselated Cap in IDL? By: David Fanning on Wed, 29 August 2012 05:45
		Re: Tasselated Cap in IDL? By: Yngvar Larsen on Tue, 28 August 2012 23:09

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