Landsat Soil Adjusted Vegetation Index
Landsat Soil Adjusted Vegetation Index (SAVI) is used to correct Normalized Difference Vegetation Index (NDVI) for the influence of soil brightness in areas where vegetative cover is low.
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Landsat Surface Reflectance-derived Soil Adjusted Vegetation Index (SAVI) are produced from Landsat 4–5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper Plus (ETM+), and Landsat 8-9* Operational Land Imager (OLI)/Thermal Infrared Sensor (TIRS) Collection 1 and Collection 2 scenes that have been processed to Landsat Level-2 Surface Reflectance products. *Landsat 9 = Collection 2 only
SAVI is used to correct Normalized Difference Vegetation Index (NDVI) for the influence of soil brightness in areas where vegetative cover is low. Landsat Surface Reflectance-derived SAVI is calculated as a ratio between the R and NIR values with a soil brightness correction factor (L) defined as 0.5 to accommodate most land cover types.
((NIR - R) / (NIR + R + L)) * (1 + L)
In Landsat 4-7, SAVI = ((Band 4 – Band 3) / (Band 4 + Band 3 + 0.5)) * (1.5).
In Landsat 8-9, SAVI = ((Band 5 – Band 4) / (Band 5 + Band 4 + 0.5)) * (1.5).
SAVI is delivered as a single band product, specified as shown in the table below.
Landsat Soil Adjusted Vegetation Index (SAVI) Specifications
| Attribute | Value |
|---|---|
| Long Name | Soil Adjusted Vegetation Index |
| Short Name | LC8SAVI, LE7SAVI, LT5SAVI, or LT4SAVI |
| File Name | *_sr_savi.tif |
| Data Type | Signed 16-bit Integer |
| Units | Spectral Index (Band Ratio) |
| Valid Range | -10,000 — 10,000 |
| Fill Value | Collection 2: -19999 Collection 1: -9999 |
| Saturate Value | 20,000 |
| Scale Factor | *0.0001 |
Data Access
Landsat Surface Reflectance-derived SAVI are produced on-demand, using the USGS Earth Resources Observation and Science (EROS) Center Science Processing Architecture (ESPA) On Demand Interface.
Visit the Landsat Surface Reflectance-derived Spectral Indices page for information on product constraints, citation, and reference information.