Sentinel-2 GEMI
Global Environment Monitoring Index for Sentinel-2
Vegetation Satellite Provider: ESA
Applications
Global Vegetation Monitoring
Environmental Monitoring
Agriculture
Forestry
Land Cover Classification
Quick Stats
Category: vegetation
Sensor: Sentinel-2
Provider: ESA
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
Sentinel-2 Specific Formula
n = (2*(B8²-B4²) + 1.5*B8 + 0.5*B4)/(B8+B4+0.5); GEMI = (n*(1-0.25*n) - B4 - 0.125)/(1-B4)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)