Impervious Surface Expansion: A Key Indicator for Environment and Urban Agglomeration—A Case Study of Guangdong-Hong Kong-Macao Greater Bay Area by Using Landsat Data

Table 1

Overview of landscape indices used in the current study.

Scale	Name	Range	Implication
Class level	PD		Representing the complexity of spatial structure, the higher PD is, the more fragmental the class is [76].
	LSI		In the measurement of patch aggregation, the larger LSI is, the more discrete the patches are [75].
Landscape level	SHDI		Representing the richness and complexity of the land surface, the higher the value, the higher the complexity of the whole landscape [77].