# MSAVI

From OTBWiki

**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.