SAVI

The SAVI is presented to mitigate the impact of soil brightness and to minimize the effects of the soil background on vegetation. Its creator “Huete” added a soil adjustment factor L to the equation of NDVI in order to correct for soil noise effects (soil colour, soil moisture, soil variability across regions, etc.), which tend to impact the results. L varies from –1 to +1, depending on the amount of green vegetation present in the area. In areas with high green vegetation L= 0, and in this case, SAVI is the same as NDVI. Conversely, L = 1 for low green vegetation zones. Most usually, L is set to 0.5 to adjust to most land cover (EOS, 2022).

Soil-Adjusted Vegetation Index

Earth system dynamics, such as plant dynamics, water bodies, and fire regimes, are widely monitored using spectral indicators obtained from multispectral remote sensing products. There is a great need for spectral index catalogues and computing tools as a result of the quick rise of suggested spectral indices. Unfortunately, the majority of these resources lack a standard Application Programming Interface, are out-of-date, closed-source, or are not linked to a catalogue. We now introduce 'VegSpecIndex', a standardised list of spectral indices for studies of the earth system. A thorough inventory of spectral indices is offered by 'VegSpecIndex' and is connected to an R library. For every spectral index, 'VegSpecIndex' provides a comprehensive collection of information, such as names, formulae, and source references. The user community may add more items to the catalogue, which will keep 'VegSpecIndex' up to date and allow for further scientific uses. Additionally, the R library makes it possible to apply the catalogue to actual data, which makes it easier to employ remote sensing resources effectively across a variety of Earth system domains.

Tanuj Misra 

VegSpecIndex

Vegetation and Spectral Indices for Environmental Assessment

Avijit Ghosh

Ram S Chaurasia

Tanuj Misra

Amit Kumar Singh

Shailendra Kumar

Abhishek Chakraborty

Devanand 

J P Singh 

A K Shukla 

SAVI function

<dl><dt>NIR</dt>
<dd>Near infra-red spectral band</dd><dt>RED</dt>
<dd>Red spectral band</dd><dt>L</dt>
<dd>Soil adjustment factor</dd></dl>

Arguments

Soil-Adjusted Vegetation Index — SAVI

<dl>

<dt>NIR</dt>
<dd>Near infra-red spectral band</dd>

<dt>RED</dt>
<dd>Red spectral band</dd>

<dt>L</dt>
<dd>Soil adjustment factor</dd>

</dl>

SAVI: Soil-Adjusted Vegetation Index

Description

Usage

Value

Arguments

References

Examples