摘要
城乡结合部是城市与农村相互结合的特殊经济地理单元,是城市快速扩张的重点区域,受城市与农村的双重影响,而目前城乡结合部范围不明确,确定方法以定性为主。针对这一特点,以信息熵理论为基础,结合分析城乡结合部土地利用特征,建立了土地利用信息熵模型。并以荆州市为例,以2000年10月ETM+影像为基础数据源,在ArcGIS和ERDAS Imagine软件的支持下,应用土地利用信息熵模型,分析熵值分布特点,最后采用突变点检测的方法,以熵值60和30确定荆州市城乡结合部的内外边界。得到荆州市城乡结合部的面积为124.4 km2,大致包括25个行政村。比较表明,该方法划分精度较高、实时性强。但若能采用更高分辨率的遥感影像并结合其他模型,会使划分精度进一步提高。
Affected by development of city and countryside, city fringe area is a special economic and geographical unit, and a major area for city spreading. But, the range of city fringe is uncertain and the method of demarcation is qualitative. In this paper, a model of message entropy for land use was established based on the theory of information entropy and the feature of land use in city fringe. As a case of Jingzhou City in Hubei Province, and by using satellite imagery landsat dated of October 2000, the model of information entropy for land use was applied in combination with remote sensing （RS） and geographic information system （GIS） techniques. Through analyzing the distribution characteristics of entropy, the range of city fringe in Jingzhou is confirmed with the entropy values of 60 and 30. Finally, the range with the area of 124.4 km^2 including 25 villages is obtained. With this method, the feature of high precision and real time is shown. If the satellite image of the higher resolution and other model were adopted, the precision of partition should be enhanced.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2007年第4期451-455,共5页
Resources and Environment in the Yangtze Basin
基金
国家自然科学基金项目(40671078)资助
关键词
城乡结合部
遥感
信息熵
荆州市
urban fringe area
remote sensing
information entropy
Jingzhou City
