NTLI	night-time light index
RSEI	remote sensing ecological index
CCDM	coupling coordination degree model
NDVI	normalized difference vegetation index
PCA	principal component analysis
GEE	Google Earth Engine
TNL	total night-time light
TCW	tasseled cap wetness
NDBSI	normalized difference built-up and soil index
LST	land surface temperature
IBI	index-based built-up index
SI	soil index
C	coupling
IPD	initial population density
GDP	gross domestic product