MSAVI

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MSAVI (Modified Soil Adjusted Vegetation Index)


Calculation:

MSAVI = SAVI with L = 1 - 2 * s * NDVI * WDVI
s = slope of soil line
WDVI = NIR - s * R


Second index:

<math>MSAVI2 = \frac{[2*NIR+1 - \sqrt{(2*NIR + 1)^2 - 8 * (NIR - R)}]}{2}</math>


Characteristics:

ratio-based index,
limited range: -1<MSAVI<1,
L not a priori but calculated


References:

Qi J., Chehbouni A., Huete A.R., Kerr Y.H., 1994. Modified Soil Adjusted Vegetation Index (MSAVI). Remote Sens Environ 48:119-126
Qi J., Kerr Y., Chehbouni A., 1994. External factor consideration in vegetation index development. Proc. of Physical Measurements and Signatures in Remote Sensing, ISPRS, 723-730.