Landsat Normalized Difference Vegetation Index (NDVI) is a global vegetative index product providing a measure of vegetation viggor. It is widely used as an indicator of plant health, vegetative cover, drought cycles etc.
NDVI is calculated as the normalized difference of the Red and near infrared (NIR) bands following the equation (NIR-Red)/(NIR+Red). Its values range between -1 and 1 where values above 0.5 represent conditions of high vegetation vigor.
Near Infrared (NIR): 0.77-0.90 μm
Red: 0.63-0.69 μm
Period of Record
Huete, A. R., Jackson, R. D., and Post, D. F. (1985), Spectral response of a plant canopy with different soil backgrounds, Remote Sens. Environ. 17:37-53.
Jackson, R. D., and Huete, A. R. (1991), Interpreting vegetation indices, J. Preventative Vet. Med. 11:185-200.
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