摘要
在大尺度城市化发展进程研究中,DMSP/OLS夜间灯光数据可以客观提供独特的视角,已成为城市空间格局研究重要的数据源之一。该文以河南省为研究区域,利用1992-2012年河南省夜间灯光影像数据和空间信息,采用平均灯光亮度、平均灯光亮度增长速度、归一化总辐射值、总灯光强度等指标以及城市重心坐标、城市重心偏移距离、城市重心偏移速度等指标对河南省各个城市的空间格局现状和城市扩张过程进行研究。结果表明:1992-2012年河南省城市化水平不断提高,小城市建成区面积增长率大于大、中城市;中北部平原地区城市发展速度较快,西部、南部山脉覆盖地区的城市发展较缓慢;整体上形成以郑州市为中心的簇状城市群向外扩张格局,并沿京广铁路和陇海铁路形成南北、东西向的"十"字形城市链形态;各城市中心的移动呈现"北城南移,南城北移",并有向中部省会郑州市聚拢的趋势。
In the large-scale urbanization development progress,DMSP/OLS night light data could reflect the real situation of the urbanization development.This paper takes Henan Province as study region and extracts the night light image data and space information in Henan from 1992 to 2012 with dynamic threshold method.The following indexes would be used to study the status quo of spatial pattern and the process of urban expansion of all cities in Henan,including average lighting brightness,the average light brightness growth rate,the normalized total radiation value,the total light intensity,and the coordinate,offset distance,migration speed for urban center of gravity,etc.The result showed that the urbanization level of Henan from 1992 to 2012 improved and the area growth rate of small scale urban built-up area was larger than big and medium city.The urbanization speed of central north plain area was faster while the urban development of the cities covered by western and southern mountains was slower.Hence,there was outer expansion of city cluster centered with Zhengzhou and a crossroad urban chain along Beijing-Guangzhou railway and Lianyungang-Lanzhou railway would be formed with south-north and east-west.The mobility of centers of all cities would be in the form of northern city moving to south and southern city moving to the north and they came aggregate to Zhengzhou.
作者
万意
陈云浩
李京
WAN Yi;CHEN Yun-hao;LI Jing(Beijing Key Laboratory of Environmental Remote Sensing and Digital City,Beijing Normal University,Beijing 100875,China)
出处
《地理与地理信息科学》
CSCD
北大核心
2019年第1期89-94,127,共7页
Geography and Geo-Information Science
基金
国家自然科学基金项目(41471348
41771448
41571342)
