Spatiotemporal Dynamics of Regional Development in the Jiangxi Province of China from 2003 to 2022: A Data-Driven Exploration Using NPP-VIIRS-Like Night Light Data

The study of the spatiotemporal evolution of regional development plays a vital role in regional coordination and sustainable development, and analyzing the characteristics of the spatiotemporal evolution of regional development in Jiangxi Province is of great significance for its deep integration into the Yangtze River Delta, the Pearl River Delta, and Fujian, and its active undertaking of industries in developed regions. Based on the National Polar-orbiting Partnership–Visible Infrared Imaging Radiometer Suite (NPP-VIIRS)-like nighttime lighting data from 2003 to 2022, this paper explores and discusses the nighttime lighting data as an effective indicator of regional development from the perspective of Jiangxi Province as a whole, using correlation analysis and multiple linear regression. Meanwhile, the spatial and temporal evolution characteristics of regional development in Jiangxi Province are explored by using spatial autocorrelation, hotspot analysis, standard deviation ellipse, and other research methods in 100 counties in Jiangxi Province. The results show the following: (1) The nighttime lighting data in Jiangxi Province shows a strong positive correlation with gross domestic product (GDP) and total population data, with correlation coefficients R2 of 0.957 and 0.896, respectively. (2) The GDP and total population of Jiangxi Province significantly impact nighttime lighting, and the regression model R2 reaches 0.983, indicating that the class NPP-VIIRS nighttime lighting data has an excellent explanatory ability for the regional development of Jiangxi Province. (3) The global autocorrelation index of nighttime lighting in each county in Jiangxi Province shows a significant positive correlation level. However, the value of this index still shows a gradually decreasing trend, indicating that the spatial heterogeneity is gradually increasing. As a whole, the hotspots in Jiangxi Province are mainly dominated by the city of Nanchang and supplemented by Ganzhou city, showing the development of two centers in the north and south. (4) The change in the trajectory of the center of gravity migration from 2003 to 2011 is also more apparent, with greater changes in the direction of regional development in Jiangxi Province. In the period 2012–2022, the direction of regional development is more stable, and the change in the migration of the center of gravity tends to be stable, indicating that the direction of regional development is clear at this stage, and there is little change in the overall direction of the economy and centripetal force. The study results provide important clues for an in-depth understanding of the regional development law in Jiangxi Province and are of some reference significance for relevant decision-making and planning.