The use of the PVI is based on the formula originally developed by Richardson and Wiegand in 1977. Sensitive to the atmospheric variations, the PVI is intended to monitor the productivity of range, forest, and croplands. Similar to DVI, it measures the perpendicular distance of the pixels from the soil line, since it is based on the assumption that soil reflectance supplies the background signal of the vegetated surfaces (Richardson &amp; Wiegand, 1977).

Perpendicular 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 Unfortunately, the majority of these resources lack a standard Application Programming Interface, are out-of-date, closed-source, or are not linked to a catalogue.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 

PVI function

<dl><dt>NIR</dt>
<dd>Near-infra red spectral band</dd><dt>RED</dt>
<dd>Red spectral band</dd><dt>s</dt>
<dd>Soil adjacent factor</dd><dt>a</dt>
<dd>intercept of NIR Vs RED data</dd><dt>b</dt>
<dd>slope of NIR Vs RED data</dd></dl>

Arguments

Perpendicular Vegetation Index — PVI

<dl>

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

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

<dt>s</dt>
<dd>Soil adjacent factor</dd>

<dt>a</dt>
<dd>intercept of NIR Vs RED data</dd>

<dt>b</dt>
<dd>slope of NIR Vs RED data</dd>

</dl>

PVI: Perpendicular Vegetation Index

Description

Usage

Value

Arguments

References

Examples