基于核密度估计的广佛都市区路网演变分析  

The Road Network Evolution of Guangzhou-Foshan Metropolitan Area Based on Kernel Density Estimation

作　　者：刘锐[1] 胡伟平[1] 王红亮[1] 吴驰[1] 何劲[1] 

机构地区：[1]华南师范大学地理科学学院,广东广州510631

出　　处：《地理科学》2011年第1期81-86,共6页Scientia Geographica Sinica

基　　金：国家自然科学基金资助项目(40871086)

摘　　要：根据1957年与1982年2个时期的地形图并结合1995年与2008年的遥感卫星影像提取路网专题信息,利用ArcGIS建立广佛都市区路网数据库。采用GIS空间分析中的核密度估计方法并结合各个方位道路密度,分析广佛都市区的路网时空演变。分析表明,近50 a来广佛都市区的路网发展总体是以广州市的越秀区和佛山市的禅城区双核为中心不断向外蔓延,次一级核相继出现并不断扩大发展的过程。空间上,路网的演变也呈现出一定的方向特性,正北,西南和正西方向一直是路网密度较高的地区,但路网发展最快的是西南和正东方向。路网密度内部差异逐年递减,路网系统发育不断成熟。Based on 1：50000 topographic maps of 1957 and 1983, and remote sensing images acquired in 1995 and 2008, the normalized thematic data of road network were extracted. These road network data were stored in database which was built up in AreGIS. Using kernel density estimation and＇ the road density, the road network spatial-temporal evolution was measured and discussed in the paper. The results show that in the past five decades, the road network development in Guangzhou-Foshan metropolitan area was dramatic, which can be charac- terized as an evolving pattern from single-core in 1957 to dual-core, and to poly-eore in current time, while the road network density core area grew larger and larger. The road density has been in monotonic increasing, while it has a significant spatial balance growth status. From the spatial perspective, the density of road network in the north, southwest, and west dimensions of the study area is higher.

关 键 词：路网 演变 核密度估计 广佛都市区 

分 类 号：K909[历史地理—人文地理学]