Table 1.

Landsat-8 spectral indices.

Spectral index	Formula
Normalized Difference Built-Up Index (NDBI)	(SWIR1-NIR)/(SWIR1 + NIR)
Modified Normalized Difference Water Index (MNDWI)	(Green-NIR)/(Green + NIR)
Normalized Difference Vegetation Index (NDVI)	(NIR-Red)/(NIR + Red)
Normalized Difference Middle Infrared (NDMIR)	(SWIR1-SWIR2)/(SWIR1 + SWIR2)
Normalized Difference Red Blue (NDRB)	(Red-Blue)/(Red + Blue)
Normalized Difference Green Blue (NDGB)	(Green-Blue)/(Green + Blue)

Spectral indices extracted from Landsat-8 OLI imagery [Blue = band 2; Green = band 3; Red = band 4; Near Infrared (NIR) = band 5; Short-wave Infrared (SWIR) 1 = band 6; Short-wave Infrared (SWIR) 2 = band 7].