Information for Sensor and Index

Formula

General Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Specific Formula	$(\frac{2 ({near_infrared}^{2} - {red}^{2}) + 1.5 near_infrared + 0.5 red}{near_infrared + red + 0.5} (1 - 0.25 \frac{2 ({near_infrared}^{2} - {red}^{2}) + 1.5 near_infrared + 0.5 red}{near_infrared + red + 0.5}) - \frac{red - 0.125}{1 - red})$
Calculated	Automatic
Comment

Sensor

Name	SPOT 5
Full Name	SystÃ¨me Probatoire dâ€™Observation de la Terre, spÃ¤ter: Satellite Pour lâ€™Observation de la Terre
Bands	5
Spectrum [nm]	480-1750
Spat.Res. [m]	2.5-20
Inclination	98.7
Platform	SPOT
Operator	CNES (Centre National d'Etudes Spatiales)
Date of Launch	2002-05-04
Comment	Stereo capability
Usable for Indices	yes
Description

Index

Name	Global Environment Monitoring Index
Abbreviation	GEMI
Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Variables	n = ( 2 * ( NIR ^2 - RED ^2) + 1.5 * NIR + 0.5 * RED ) / ( NIR + RED + 0.5 )
Expl. of Variables
Wavelengths	640:760,780:1400
Source	Original formula
Description	Bannari 1996

References

Nr.	Author/Title	Year	Comment
1	Ceccato, Pietro; Flasse, StÃ©phane; Tarantola, Stefano; Jacquemoud, StÃ©phane; GrÃ©goire, Jean-Marie - Detecting vegetation leaf water content using reflectance in the optical domain	2001
2	Rondeaux, GeneviÃ¨ve; Steven, Michael; Baret, FrÃ©dÃ©ric - Optimization of soil-adjusted vegetation indices	1996

Visualisation

Sensor

Index