Module Vegetation Index (Slope Based)
Slope based vegetation indices.
- Ratio Vegetation Index (Richardson and Wiegand, 1977)
RVI = R / NIR - Normalized Ratio Vegetation Index (Baret and Guyot, 1991)
NRVI = (RVI - 1) / (RVI + 1) - Normalized Difference Vegetation Index (Rouse et al. 1974)
NDVI = (NIR - R) / (NIR + R) - Transformed Vegetation Index (Deering et al., 1975)
TVI = [(NIR - R) / (NIR + R)]^0.5 + 0.5 - Corrected Transformed Ratio Vegetation Index (Perry and Lautenschlager, 1984)
CTVI = [(NDVI + 0.5) / abs(NDVI + 0.5)] * [abs(NDVI + 0.5)]^0.5 - Thiam's Transformed Vegetation Index (Thiam, 1997)
RVI = [abs(NDVI) + 0.5]^0.5 - Soil Adjusted Vegetation Index (Huete, 1988)
SAVI = [(NIR - R) / (NIR + R)] * (1 + S)
References:
K.R. McCloy (2006): Resource Management Information Systems: Remote Sensing, GIS and Modelling. 2nd Edition, CRC Taylor & Francis, 575pp.
N.G. Silleos, T.K. Alexandridis, I.Z. Gitas & K. Perakis (2006): Vegetation Indices: Advances Made in Biomass Estimation and Vegetation Monitoring in the Last 30 Years, Geocarto International, 21:4, 21-28, online.
- Author: V.Olaya (c) 2004, O.Conrad (c) 2011
- Specification: grid
- Menu: Imagery|Vegetation Indices
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Red Reflectance | Grid (input) | RED | - | - |
| Near Infrared Reflectance | Grid (input) | NIR | - | - | |
| Output | Difference Vegetation Index (*) | Grid (optional output) | DVI | - | - |
| Normalized Difference Vegetation Index (*) | Grid (optional output) | NDVI | - | - | |
| Ratio Vegetation Index (*) | Grid (optional output) | RVI | - | - | |
| Normalized Ratio Vegetation Index (*) | Grid (optional output) | NRVI | - | - | |
| Transformed Vegetation Index (*) | Grid (optional output) | TVI | - | - | |
| Corrected Transformed Vegetation Index (*) | Grid (optional output) | CTVI | - | - | |
| Thiam's Transformed Vegetation Index (*) | Grid (optional output) | TTVI | - | - | |
| Soil Adjusted Vegetation Index (*) | Grid (optional output) | SAVI | - | - | |
| Options | Soil Adjustment Factor | Floating point | SOIL | Soil adjustment factor for SAVI calculation. Suggested values are 1.0 in case of very low vegetation, 0.5 for intermediate 0.5, and 0.25 for high densities (Silleos et al. 2006). | Minimum: 0.000000 Maximum: 1.000000 Default: 0.500000 |
| (*) optional | |||||
Command-line
Usage: saga_cmd imagery_tools 1 -RED <str> -NIR <str> [-DVI <str>] [-NDVI <str>] [-RVI <str>] [-NRVI <str>] [-TVI <str>] [-CTVI <str>] [-TTVI <str>] [-SAVI <str>] [-SOIL <str>] -RED:<str> Red Reflectance Grid (input) -NIR:<str> Near Infrared Reflectance Grid (input) -DVI:<str> Difference Vegetation Index Grid (optional output) -NDVI:<str> Normalized Difference Vegetation Index Grid (optional output) -RVI:<str> Ratio Vegetation Index Grid (optional output) -NRVI:<str> Normalized Ratio Vegetation Index Grid (optional output) -TVI:<str> Transformed Vegetation Index Grid (optional output) -CTVI:<str> Corrected Transformed Vegetation Index Grid (optional output) -TTVI:<str> Thiam's Transformed Vegetation Index Grid (optional output) -SAVI:<str> Soil Adjusted Vegetation Index Grid (optional output) -SOIL:<str> Soil Adjustment Factor Floating point Minimum: 0.000000 Maximum: 1.000000 Default: 0.500000