[GRASS5] Vegetation Indices
neteler at itc.it
Sun Mar 14 08:02:48 EST 2004
On Sun, Mar 14, 2004 at 11:51:16AM +0530, Uttam Kumar wrote:
> Hi GRASS users,
> How can I compute Vegetation Indices (like Ratio,
> NDVI, RVI, TVI, CTVI, TTVI etc.) in GRASS as we can do it in IDRISI. Thanks
> in advance.
It's failry easy:
r.mapcalc "ndvi= float( (tm4 - tm3) / (tm4 + tm3 ) )"
Similar to that you can calculate other Vegetation Indices.
Then it is useful to apply a color table with r.colors.
More information about the grass-dev