Table 1.

Defining the spectral signatures of ten predetermined land cover types present in the images.

Land Type	Definition
Water	Colorless, transparent, odorless, tasteless liquid that forms the seas,
River	Large natural stream of water flowing in a channel to the sea, a lake, or another stream
Urban	All built-in areas including residential, commercial, and industrial
Agriculture	Cropland and pastures
Wetland	Land consisting of marshes or swamps; saturated land
Forest	A large tract of land covered with trees and underbrush; woodland
Salt flats	An extensive level tract coated with salt deposits left by evaporation of rising ground water or a temporary body of surface water
Bare land	Land in its unused natural state
Cloud	The projection of a cloud structure with respect to the direction of incoming solar radiation from the satellite
Shadow	Shadows cast by clouds and other features