SI: SI - Shadow Index

In nightmares: Common Analysis with Remote Sensing Data

Description

SI has main applications in forestry and crop monitoring. The characteristics of canopy shadow are associated by the total spectral radiance that is reflected from the canopy. Canopy shadow provides essential information about trees and plants arrangement.

Usage

SI(B, G, R)

Arguments

B	A raster layer object with the reflectance values for the Blue band.
G	A raster layer object with the reflectance values for the Green band.
R	A raster layer object with the reflectance values for the Red band.

Value

SI - Shadow Index

References

Rikimaru et al., 2002. Tropical forest cover density mapping. Tropical Ecology, 43, 39-47. https://www.geo.university/pages/spectral-indices-with-multispectral-satellite-data.

Examples

library(raster)
path_files <- system.file("extdata/", package="nightmares")
bands <- stack(list.files(path_files,".tif", full.names=TRUE))
x <- ref_oli(bands, sun.elev= 67.97)
SI(x[[2]], x[[3]], x[[4]])

nightmares documentation built on Oct. 23, 2020, 7:15 p.m.