基于多源遥感数据的城市一体化演变分析

Evolution Analysis of Urban Integration Based on Multi-Source Remote Sensing Date

利用2015年湖南省第一次地理国情普查成果和Landsat各时期遥感影像,获取长沙、株洲、湘潭三市1978、1990、1994、2000、2006、2010、2015年七个时相的城区矢量边界,然后借助遥感数据处理平台ArcGIS10.2,进行时间序列、空间形态叠置分析。通过计算质心坐标、扩展强度、产业结构相似性等相关指数,辅助经济专题数据,从城市质心移动分布、城市扩张空间分布、城市空间竞合力3方面对长株潭1978-2015年间城市空间一体化进行研究分析。研究结果表明:1)长、株、潭三市城区范围在不断扩大,城区扩张符合长株潭区域规划核心区空间发展战略;2)三市间的城市质心距离在不断缩小,长株潭整体质心向北偏移,长株潭一体化趋势比较明显;3)从空间竞合力分析,长株潭城市的产业结构相似度高,城市的支柱产业明显,起到了长株潭核心产业带动作用,也促进了长株潭区域空间一体化。

The thesis got urban boundary vector about seven time phases in 1978,1990,1994,2000,2006,2010 and 2015 from three cities of Changsha,Zhuzhou and Xiangtan,using the first general survey results of geographic national conditions of Hunan Province in 2015 and corresponding period Landsat images.Then,it was proceeded the time series and spatial overlaying analysis with the help of ArcGIS10.2 platform.By calculating relative indexes about the centroid coordinates,expansion intensity,industrial structure similarity,etc,and economic special data besides,it have been analyzed spatial integration from 1978 to 2015 in Changsha-Zhuzhou-Xiangtan region from three aspects of the city centroid-moving distribution,the spatial differentiation of city expansion and the spatial competitive force.The results show that:1)The urban scale of the three cities have been expanding,which conforms to the city spatial development strategy of core planning regions in Changsha-Zhuzhou-Xiangtan;2)With the shrinking of the centroid distance among the three cities,the whole centroid of Changsha-Zhuzhou-Xiangtan region is migrating to the north and the integration trend is obvious;3)From the analysis of spatial competitiveness and coorperation,the industrial structure represents high similarity and the city’s pillar industry is obvious in Changsha-Zhuzhou-Xiangtan region,which not only plays a leading role of core industries,but also promotes the regional integration for Changsha-Zhuzhou-Xiangtan region region.