BJ3N GEMI
Global Environment Monitoring Index for BJ3N
Vegetation Satellite Provider: 21AT
Applications
Global Vegetation Monitoring
Environmental Monitoring
Agriculture
Forestry
Land Cover Classification
Quick Stats
Category: vegetation
Sensor: BJ3N
Provider: 21AT
Bands Used: 2
Description
Non-linear vegetation index designed for global vegetation monitoring from satellites. Less sensitive to soil background variations compared to NDVI and provides enhanced discrimination of vegetation states.
Formulas
General Formula
BJ3N Specific Formula
n = (2*(NIR²-Red²) + 1.5*NIR + 0.5*Red)/(NIR+Red+0.5); GEMI = (n*(1-0.25*n) - Red - 0.125)/(1-Red)Spectral Band Visualization
Band Wavelengths
Red: 630-690 nm
NIR: 770-900 nm
Code Examples
gemi.py
References
Pinty & Verstraete (1992)
Bannari et al. (1996)