Take the 2-minute tour ×
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

I want to classify an Aster image using the ASTER Spectral Library - Version 2.0 Anyone here ever done this? Any suggestions?

Note: I'm using opensource GIS and Remote Sensing software

Thanks.

share|improve this question

1 Answer 1

You can use it for linear spectral unmixing. You can find some literature about this here:

http://scholar.google.it/scholar?q=spectral+unmixing

NB: I have written a linear spectral unmixing (i.spec.unmix) for GRASS GIS in 1999, it is available in GRASS Addons but needs some updates for GRASS 6.

share|improve this answer
    
Where can I find i.spec.unmix? –  vascobnunes Jun 15 '12 at 15:22
    
You can find it here: grass.osgeo.org/wiki/Addons#i.spec.unmix but as mentioned, it requires some C programming. Volunteers welcome (I currently don't find the time)... –  markusN Jun 16 '12 at 8:37
    
But what exactly do you mean by "linear spectral unmixing"? –  vascobnunes Jun 18 '12 at 9:56
    
(Linear) spectral unmixing is a technique used to decompose pixelwise a source spectrum information (multi- or hyperspectral data) into a set of given endmember spectra which you can either obtain from the image itself or from a spectral library. For literature, see the link above. –  markusN Jun 18 '12 at 13:35

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.