Tool Vegetation Index (Slope Based)
Slope based vegetation indices.
- Difference Vegetation Index
DVI = NIR - R
- Normalized Difference Vegetation Index (Rouse et al. 1974)
NDVI = (NIR - R) / (NIR + R)
- Ratio Vegetation Index (Richardson and Wiegand, 1977)
RVI = R / NIR
- Normalized Ratio Vegetation Index (Baret and Guyot, 1991)
NRVI = (RVI - 1) / (RVI + 1)
- 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 + L)] * (1 + L)
(NIR = near infrared, R = red, S = soil adjustment factor)
References
- Huete, A.R. (1988): A soil-adjusted vegetation index (SAVI). Remote Sensing of Environment, vol. 25, issue 3, pp. 259-309. https://doi.org/10.1016/0034-4257(88)90106-X.
- McCloy, K.R. (2006): Resource Management Information Systems: Remote Sensing, GIS and Modelling. 2nd Edition, CRC Taylor & Francis, 575pp.
- Mroz, M., Sobieraj, A. (2004): Comparison of Several Vegetation Indices Calculated on the Basis of a Seasonal Spot XS Time Series, and their Suitability for Land Cover and Agricultural Crop Identification. Technical Sciences, No. 7, 39-66. http://www.uwm.edu.pl/wnt/technicalsc/ts7_2004/4_7_2004.pdf.
- Silleos, N.G., Alexandridis, T.K., Gitas, I.Z., Perakis, K. (2006): Vegetation Indices: Advances Made in Biomass Estimation and Vegetation Monitoring in the Last 30 Years. Geocarto International, 21:4, 21-28. http://dx.doi.org/10.1080/10106040608542399.
- Author: V.Olaya (c) 2004, O.Conrad (c) 2011
- 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, output, optional | DVI | - | - |
| Normalized Difference Vegetation Index (*) | Grid, output, optional | NDVI | - | - |
| Ratio Vegetation Index (*) | Grid, output, optional | RVI | - | - |
| Normalized Ratio Vegetation Index (*) | Grid, output, optional | NRVI | - | - |
| Transformed Vegetation Index (*) | Grid, output, optional | TVI | - | - |
| Corrected Transformed Vegetation Index (*) | Grid, output, optional | CTVI | - | - |
| Thiam's Transformed Vegetation Index (*) | Grid, output, optional | TTVI | - | - |
| Soil Adjusted Vegetation Index (*) | Grid, output, optional | SAVI | - | - |
| Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Soil Adjustment Factor | Floating point | SOIL | For SAVI, suggested values (after Silleos et al. 2006): 1.0 = very low, 0.5 = intermediate, 0.25 = high densitity vegetation. | 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 <double>]
-RED:<str> Red Reflectance
Grid, input
-NIR:<str> Near Infrared Reflectance
Grid, input
-DVI:<str> Difference Vegetation Index
Grid, output, optional
-NDVI:<str> Normalized Difference Vegetation Index
Grid, output, optional
-RVI:<str> Ratio Vegetation Index
Grid, output, optional
-NRVI:<str> Normalized Ratio Vegetation Index
Grid, output, optional
-TVI:<str> Transformed Vegetation Index
Grid, output, optional
-CTVI:<str> Corrected Transformed Vegetation Index
Grid, output, optional
-TTVI:<str> Thiam's Transformed Vegetation Index
Grid, output, optional
-SAVI:<str> Soil Adjusted Vegetation Index
Grid, output, optional
-SOIL:<double> Soil Adjustment Factor
Floating point
Minimum: 0.000000
Maximum: 1.000000
Default: 0.500000