Table 17.1 Visual interpretation features of typical land use/cover types in the study area
Subclass
Color feature
Shape feature
Typical sample regions
(RGB: band743)
PML1
Grayish blue
Rectangular shape in order
PML2
Grayish green
Rectangular shape in order
Band land1
Purplish red
Granular
Band land2
Flesh-colored
Granular
Saline land
White
Random
Fallow land
Flesh-colored
Regular blocks
Vegetation cover
Green
Regular block
Water body
Bluish block
Smooth
Note: Bare land1 is Gobi of quartz sands mixed with small gravel; saline land is the bare land whose
topsoil has a high salt content
356
L. Lu