Table 3.2
Commonly used vegetation index in biomass estimates
Index
Function
References
Normalized difference vegetation index
NDVI = (qNIR – qR)/(qNIR
? qR)
Rouse et al. (1973)
Simple ratio
SR = qNIR/qR
Birth and McVey (1968)
MIR index
MIRI = (qMIR – qR)/(qMIR
? qR)
Roy and Ravan (1996)
Difference vegetation index
DVI = qNIR
– qR
Tucker (1979)
Modified soil adjusted vegetation index 1
MSAVI1 = (qNIR – qR)(1
? L)/(qNIR ? qR
? L));
where L is a soil adjustment factor
Qi et al. (1994)
Modified soil adjusted vegetation index 2
MSAVI2 = qNIR
? 0.5 – ((qNIR ? 0.5)2 – 2(qNIR – qR))1/2
Qi et al. (1994)
Enhanced vegetation index
EVI = G(qNIR – qR)/(qNIR
? C1*qR – C2qB ? L);
where L = 1,
C1 = 6, C2 = 7.5, G = 2.5
Huete et al. (2002)
Chlorophyll based difference index
CI = (q850 – q710)/(q850
– q680)
Datt (1999)
MSI
MSI = qSWIR/qNIR
Rock et al. (1986)
Tasseled cap transformation
Greenness (TCg), brightness (TCb) and wetness indices (TCw)
Crist 1985; Huang et al. 2002;
Zhang et al. 2002; Horne 2003
NDVIc index
NDVIc = ((qNIR – qR)/(qNIR
? qR))(1
– (qSWIR – qSWIRmin)/
(qSWIRmax – qSWIRmin));
where qSWIRmax
and qSWIRmin
are the minimum and mavximum
reflectance observed in field plots
Nemani et al. (1993)
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