The rapid and imbalanced economic development in the Beijing- Tianjin- Hebei region has widened the gap between Beijing- Tianjin and surrounding areas since the 1990 s,therefore, it is an important social consensus to achieve coordinated development. In this paper,we analyzed the imbalanced economic development in the Beijing- Tianjin- Hebei region by proposing a GDP Index using the DMSP/OLS nighttime light data to represent the regional economic development. Then the Getis- Ord General G, Global Moran's I ...