Early Identifying and Monitoring Landslides in Guizhou Province with InSAR and Optical Remote Sensing

Table 3

Optical Remote Sensing Interpretation and Identification Signs of Landslides.

Identification signs	Image characteristics
Direct identification signs	Geometry	Gentler than surrounding slope; The slope is tongue-shaped or curved; The back wall of the landslide; Looks like a chair
	Color tone	Off-white; Khaki; Dark brown
	Texture	Rough; Grainy; Uneven
Indirect identification signs	Geomorphology	Fracture distribution; Multi-layer terraces; Mostly distributed in gully areas
	Slope vegetation	Low vegetation coverage; And exposed rock mass
	Rivers, roads or buildings	Unnatural river turns or diversions