Vegetation Index (Slope Based)
| Author(s) | V.Olaya (c) 2004, O.Conrad (c) 2011 |
| Library ID | imagery_tools |
| Tool ID | 1 |
| Version | 1.0 |
| Menu | Imagery | Spectral Indices |
Description
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
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 number | SOIL | For SAVI, suggested values (after Silleos et al. 2006): 1.0 = very low, 0.5 = intermediate, 0.25 = high density vegetation. | Minimum: 0.000000
Maximum: 1.000000
Default: 0.500000 |
Command Line
Usage: saga_cmd imagery_tools 1 [-RED ] [-NIR ] [-DVI ] [-NDVI ] [-RVI ] [-NRVI ] [-TVI ] [-CTVI ] [-TTVI ] [-SAVI ] [-SOIL ]
-RED: Red Reflectance
grid, input
-NIR: Near Infrared Reflectance
grid, input
-DVI: Difference Vegetation Index
grid, output, optional
-NDVI: Normalized Difference Vegetation Index
grid, output, optional
-RVI: Ratio Vegetation Index
grid, output, optional
-NRVI: Normalized Ratio Vegetation Index
grid, output, optional
-TVI: Transformed Vegetation Index
grid, output, optional
-CTVI: Corrected Transformed Vegetation Index
grid, output, optional
-TTVI: Thiam's Transformed Vegetation Index
grid, output, optional
-SAVI: Soil Adjusted Vegetation Index
grid, output, optional
-SOIL:
Soil Adjustment Factor
floating point number
Minimum: 0.000000
Maximum: 1.000000
Default: 0.500000