ndbi: Normalized Difference Built-up Index

In varunayan: Download and Process 'ERA5', IMD, 'HadEX3' and 'CRU TS' Data

Normalized Difference Built-up Index

Description

NDBI = (SWIR - NIR) / (SWIR + NIR) from surface reflectance, using the 1.55-1.75 um shortwave infrared band, e.g. Landsat 8-9 bands 6 and 5, Sentinel-2 bands 11 and 8, or Landsat 5 TM bands 5 and 4 as in Zha et al. (2003). Positive values indicate built-up or bare surfaces. Works on numeric vectors and on terra::SpatRaster layers.

Usage

ndbi(swir, nir)

Arguments

swir	Shortwave infrared reflectance.
nir	Near-infrared reflectance.

Value

NDBI in the range -1 to 1, the same shape as the inputs.

References

Zha, Y., Gao, J. & Ni, S. (2003). Use of normalized difference built-up index in automatically mapping urban areas from TM imagery. International Journal of Remote Sensing, 24(3), 583-594. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1080/01431160304987")}

See Also

ndvi()

Examples

ndbi(swir = 0.30, nir = 0.22)

varunayan documentation built on Oct. 30, 2026, 1:07 a.m.