Landsat Surface Reflectance-Derived Spectral Indices

Landsat Soil Adjusted Vegetation Index

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Landsat Surface Reflectance and Soil Adjusted Vegetation Index

This image displays a (left) Landsat 8 Surface Reflectance (SR) and (right) the SR-derived Landsat Surface Reflectance Soil Adjusted Vegetation Index (SAVI).

Landsat Surface Reflectance-derived Soil Adjusted Vegetation Index (SAVI) are derived from Landsat 4–5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper Plus (ETM+), and Landsat 8 Operational Land Imager (OLI)/Thermal Infrared Sensor (TIRS) scenes that can be successfully processed to Landsat Level-2 Surface Reflectance products.  

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, SAVI = ((Band 5 – Band 4) / (Band 5 + Band 4 + 0.5)) * (1.5).

SAVI is a delivered as a single band product, specified as shown in the table below.

Landsat Surface Reflectance-derived Soil Adjusted Vegetation Index (SAVI) Specifications
Attrribute 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 -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 (ESPA)

Visit the Landsat Surface Reflectance-Derived Spectral Indices webpage for information on product contraints, citation, and reference information.