Table 2.

Equations of the spectral index used in the study.

Name	Abbrev.	Type	Equation
Normalized difference vegetation index	NDVI	Red–NIR	(Rn − Rr)/(Rn + Rr)
Green normalized difference vegetation index	GNDVI	Green–NIR	(Rn – Rg)/(Rn + Rg)
Blue Normalized difference vegetation index	BNDVI	Blue–NIR	(Rn–Rb)/(Rn + Rb)
Normalized difference red edge index	NDREI	RE–NIR	(Rg − Rr)/(Rg + Rr)