Analysis of Urban Expansion Characteristics and Driving Forces in Guangxi Based on Nighttime Light Remote Sensing
Urbanization has become a hot spot of social concern,and the continuous expansion of urban built-up area range has led to many problems.In order to better understand the law of urban development,Guangxi Zhuang Autonomous Region is taken as the studied area,and the reference and comparison method is adopted,the NPP-VIIRS nighttime lighting data from 2014 to 2021 is selected as the data source,the scope of Guangxi built-up area is extracted,and the law of urban expansion is derived through an analysis of the expansion index of Guangxi built-up area form.By calculating the expansion rate,expansion intensity,migration of urban center of gravity,economic gravitational index and conducting driving force analysis,the development law of urban expansion in Guangxi is explored.The research results show that ① the expansion of built-up areas in Guangxi is mainly concentrated in cities such as Nanning,Liuzhou,Guilin and Yulin,and the expansion intensity and rate of Guangxi as a whole show a slowly decreasing trend,and it is mainly an outward expansion.② The urban center of gravity of Guangxi as a whole shows a developing trend of moving to the south,and the economic gravity with Nanning city as the core is radiating to the surrounding cities.③ The expansion of built-up area is mainly concentrated in the flat terrain area,and is influenced by policy,population and economic development factors.The study provides a theoretical basis and scientific data support for urban development planning and spatial structure adjustment in Guangxi.
nighttime light remote sensingurban expansionbuilt-up area scopefeature analysis
国家科技期刊平台
NSTL
万方数据
