Measurement of Urban Expansion and Spatial Correlation of Central Yunnan Urban Agglomeration Using Nighttime Light Data

Table 2

Percentage of the urban built-up area of the CYUA from 2000 to 2018.

City	2000		2018		2000–2018
	Area (km^2)	Proportion (%)	Area (km^2)	Proportion (%)	Area (km^2)	Proportion (%)
Kunming city	149	60.08	565	48.54	416	45.41
Qujing city	25	10.08	213	18.30	188	20.52
Yuxi city	18	7.26	76	6.53	58	6.33
Hani-Yi Autonomous Prefecture of Honghe	32	12.90	205	17.61	173	18.89
Yi Autonomous Prefecture of Chuxiong	24	9.68	105	9.02	81	8.84