基于RS/GIS的城市空间扩展与外部形态演变研究——以江苏省淮安市为例  

Study on Urban Spatial Expansion and External Morphology Evolution Based on RS/GIS:A Case of Huai'an City

作　　者：尚正永[1,2] 张小林[2] 周晓钟[1] 

机构地区：[1]淮阴师范学院城市与环境学院,中国江苏淮安223300 [2]南京师范大学地理科学学院,中国江苏南京210046

出　　处：《经济地理》2012年第8期64-70,共7页Economic Geography

基　　金：教育部人文社会科学规划基金项目(10YJA790154);国家自然科学基金项目(41071114)

摘　　要：利用遥感影像和城市建成区图,运用GIS分析技术,以淮安市主城区为例,对城市空间扩展与外部形态演变进行了分析,结果表明,淮安主城区空间扩展具有明显的阶段性与各向异性特征,1965年以前,城市扩展缓慢,以北向、西北向扩展为主,1965—1979年,扩展规模较小,以西南向扩展为主,1979—1995年,扩展速度开始加快,以西北向、西南向为扩展的主导方向,1995年以后,城市空间加速扩展,以东向、东南向扩展为主。城市空间扩展的模式可概括为扇翼缓慢扩展型、圈层式扩展型和扇翼快速扩展型三种类型。淮安主城区形态经历了由星形向块状演变的过程,具有明显的趋圆性特点,城市空间扩展的阶段性与各向异性对外部形态的演变具有明显的影响作用。In the case of Huai＇ an city, this paper examines urban spatial expansion and extemal morphology evolution. GIS approaches are used to analyze and data sources from remote sensing images and urban built-up area status map. There are some findings as follows： first, urban spatial expansion is characterized by phase and anisotropy. Before the year of 1965, urban space grows slowly, mainly expanding to north and northwest direction. From the year of 1979 to 1995, the urban space grows by high-speed, and the dominant direction turns to the northwest and southwest. Since the year of 1995, urban space grows faster than before and the dominant expanding orientation is east and southeast. Second, Urban spatial expansion model can be summarized as three types, including the type of slow expansion by wing, the type of circle progressive expanding and the type of rapid expansion by wing. Third, the paper calculates the compact index, fractal dimension and shape index, finding that the urban spatial form of Huai＇an city is relatively stable. Moreover, the urban form changes from star shape to block shape, and obvious tends to round. Last, the study also finds that the characteristics of stage and anisotropy have significant effects on the evolution of urban extemal morphology.

关 键 词：城市空间扩展 外部形态演变 淮安市 

分 类 号：F293.2[经济管理—国民经济]