基于夜光遥感影像的“一带一路”沿线国家城市发展时空格局分析

The Spatial-Temporal Pattern Analysis of City Development in Countries along the Belt and Road Initiative Based on Nighttime Light Data

基于1993~2012年长时间序列夜光遥感数据,利用空间统计、空间标准差椭圆和位序-规模分布方法研究"一带一路"(the Belt and Road Initiative,B&R)沿线国家的城市体系空间结构和时空演化趋势。结果表明:"一带一路"沿线各国城市夜间灯光增长最快的是进行经济改革的发展中国家和战后重建的国家,城市夜间灯光锐减主要发生在社会经济动荡地区。"一带一路"区域内城市夜间灯光的规模分布总体呈现空间扩张趋势,夜间灯光重心向东南亚方向移动。"一带一路"区域内城市夜光规模前2 000位的城市夜间灯光符合位序-规模准则,高位序城市夜间灯光规模不够突出而中小城市发育相对较好,集中趋势大于分散趋势。

Based on the DMSP/OLS nighttime light data for the years 1993-2012 and spatial analysis methods including standard deviational ellipse and rank-size distribution, this paper systematically analyzes the spatial structure and spatiotemporal dynamics of the urban system in countries along B＆R （The Belt and Road Initiative）. We found that nighttime light increased in most countries along B＆R. These fast growing countries are undergoing economic reforms and post-war reconstruction, while nighttime light reduction occurs in areas of social and economic unrest. The trend of size distribution of nighttime light in B＆R is continuous spatial expansion, and the center of the nighttime light is moving to southeast Asia. The nighttime light distribution in the top 2000 urban places in B＆R follows the rank-size distribution, thus urban land distribution is more concentrated than the past. The high rank cities are fairly well developed, but the development of the small cities is lagging behind. The general distribution trend toward, concentration is stronger than decentralization in B＆R.