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Last Post 19 May 2008 07:12 AM by  anon
MODIS data , turbidity index
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anon



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19 May 2008 07:12 AM
    I have MODIS Ocean Color L1 data which is georeferenced. Now i want to apply an algo on this data but i don't know how to apply it using envi? Like in ERDAS we have modules, so what is in ENVI for it? Actually, i need NIR and visible bands' pixel values , so how can i implement that in the expression using ENVI? thanks in advance.

    MariM



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    19 May 2008 07:12 AM
    If the equation is fairly simple, you can implement this in Band Math (under Basic Tools). Enter your equation using something like: (b1-b2)/(b1+b2) The 'b1' and 'b2' are unassigned variables that you will assign in the next dialog to whatever band you wish. If your equations are more complex, you can write a band math function or an IDL program. Have a look in the ENVI help under Band Math ->user functions for more information.
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