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

Table 4

The urban spatial connection intensity from 2000 to 2018.

Urban spatial connection intensity	2000	2005	2010	2015	2018
Kunming city	1.31	1.35	1.46	1.68	2.14
Qujing city	0.22	0.18	0.26	0.43	0.73
Yuxi city	1.02	1.06	1.09	1.09	1.10
Hani-Yi Autonomous Prefecture of Honghe	0.04	0.13	0.19	0.14	0.13
Yi Autonomous Prefecture of Chuxiong	0.08	0.10	0.11	0.23	0.44