How to run NDVI calculation on LandSat multispectral data

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Last Post 03 Mar 2010 09:01 AM by anon

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anon

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03 Mar 2010 09:01 AM
Can anyone direct me to steps on how to run the NDVI calculation through a ENVI GUI? I find batch code under the IDL post "how to calculate NDVI for tons of MODIS images using IDL", but i can not find the GUI instructions to run the NDVI calculation. I have a LandSat 7 multispectral image. I did find steps for ENVI 4.3 here http://www.docstoc.com/do...rocessing-with-ENVI, but they don't match 4.7. I have access here at school to ENVI 4.7, ENVI EX, ENVI + IDL and ENVI Zoom. Thanks Dan Kennedy

MariM

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03 Mar 2010 02:00 PM
You can use Transform ->NDVI. Select your ETM image for the input file and select the sensor type as 'TM'. ETM and TM data both have band 3 as red and band 4 as NIR. Alternately, you can always use Basic Tools ->Band Math to perform the NDVI equation.

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