calc_bsi: Calculate Bare Soil Index (BSI)

In GeoIndexR: Computation of Spectral and Geospatial Indices from Multispectral Raster Data

Calculate Bare Soil Index (BSI)

Description

Computes the Bare Soil Index (BSI), combining blue, red, NIR, and SWIR bands to distinguish bare soils from vegetation and impervious land.

Usage

calc_bsi(swir1, red, nir, blue)

Arguments

swir1	Short-wave infrared 1 band (terra::SpatRaster or numeric).
red	Red band (terra::SpatRaster or numeric).
nir	Near-infrared band (terra::SpatRaster or numeric).
blue	Blue band (terra::SpatRaster or numeric).

Details

BSI = \frac{(SWIR1 + RED) - (NIR + BLUE)}{(SWIR1 + RED) + (NIR + BLUE)}

Value

A terra::SpatRaster (named "BSI") or numeric vector with index values.

References

Rikimaru, A., Roy, P. S., & Miyatake, S. (2002). Tropical forest cover density mapping. Tropical Ecology, 43(1), 39-47.

See Also

geo_index

Examples

calc_bsi(swir1 = 0.5, red = 0.4, nir = 0.2, blue = 0.1)

GeoIndexR documentation built on Oct. 10, 2026, 5:08 p.m.