基于RS/GIS的珠海市城市空间扩展

Urban Spatial Expansion of Zhuhai City Based on RS/GIS

以珠海市为研究区域,基于RS/GIS数据源,将多个时段TM遥感影像解译成土地利用现状图,研究1973-2008年珠海市城市空间扩展。结果表明:(1)1973-1988年是珠海市城市发展的初期,飞地式扩展占新增城市用地面积的84.51%,边缘式扩展的比例为12.76%,而填充式扩展为2.71%;(2)1988-1998、1998-2008年分别是城市发展的"扩散"阶段和"边缘扩张"阶段,飞地式扩展开始沿着交通线在金湾和斗门两区范围内大幅扩散,全市以飞地式扩展为主,边缘式和填充式扩展比例较低;(3)从政策和经济两方面分析影响珠海市城市空间扩展的驱动力因素,其中政策因素对珠海市的城市发展有着重要影响,从特区设立开始,到后来的特区扩容,珠海的发展深深地刻上了特区政策的烙印;经济驱动是珠海市城市发展的重要因素,其与人口增长因素是导致珠海市城市空间扩展的最直接驱动力。

Taking Zhuhai as an example,this paper employs the ArcGIS technology to investigate the urban expansion of the city with TM remote sensing images from 1973 to 2008.The results show that：（1） In the early period（1973-1988）,the expansion land of enclave type accounted for 84.51% of the new urban area,that of the edge type 12.76%,and that of the filling type 2.71%;（2） The period from 1988 to 1998 was the phase of spreading urban development,and the period from 1998 to 2008 was the phase of edge expansion of urban development.The enclave diffusion began in Jinwan and Doumen districts and spread substantially along the traffic lines.In the whole city,the enclave expansion was of the main urban spatial expansion type,and the edge type and filling type expansion had much lower proportion;（3） Since the establishment of the SEZ of Zhuhai,policy factors have brought great influence on the spatial expansion of the city;economic development and the growth of population are considered to be the direct driving force of the expansion.