Dragonette-1 GEMI
Global Environment Monitoring Index for Dragonette-1
Vegetation Satellite Provider: Wyvern
Applications
Global Vegetation Monitoring
Environmental Monitoring
Agriculture
Forestry
Land Cover Classification
Quick Stats
Category: vegetation
Sensor: Dragonette-1
Provider: Wyvern
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
Dragonette-1 Specific Formula
n = (2*(Band 22²-Band 10²) + 1.5*Band 22 + 0.5*Band 10)/(Band 22+Band 10+0.5); GEMI = (n*(1-0.25*n) - Band 10 - 0.125)/(1-Band 10)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)