1. This paper proposed a nighttime light economy index (NLEI) to investigate the urban NTE level
2. Data: DMSP/OLS Nighttime Light Data
The administrative boundary maps, Land use/land cover data (http://www.resdc.cn/)
3. Methods
3.1 Extraction of Built-up Area
Method: threshold technique
3.2 The Compound Night Light Index (CNLI)
3.3. The Urban Night Light Economy Index (NLEI)
