[GRASS-user] Quick note on EVI2 vs NDVI

GRASS GRASS user
1

Hi list!

Just wanted to drop a note on EVI2. It looks and performs better than NDVI
(tested with large Landsat5TM-based mosaics over Greece). It sure helps
visual discrimination of dense vegetation from the rest.

Will post screenshots at some point laaater (in the Wiki of course) -- using
color=ndvi for both currently.

I wonder, however, if there a separate, tweaked, evi(2) set of color rules is
required to get most out of it.

Best, N

2

On Friday 22 of February 2013 13:33:42 Nikos Alexandris wrote:

Just wanted to drop a note on EVI2. It looks and performs better than NDVI
(tested with large Landsat5TM-based mosaics over Greece). It sure helps
visual discrimination of dense vegetation from the rest.

Me thinks, at least...

Will post screenshots at some point laaater (in the Wiki of course) -- using
color=ndvi for both currently.

I wonder, however, if there a separate, tweaked, evi(2) set of color rules
is required to get most out of it.

An example: http://grasswiki.osgeo.org/wiki/User:NikosA#EVI2_vs_NDVI

N