【摘要】 在长时间序列多光谱遥感数据和高精度自组织神经网络分类方法的支持下,对北京地区1994~2003年城市化的基本过程进行了分析和研究,5种地物分类结果表明:北京近10年来城市扩展基本是以老城为中心围绕环线不断向外围扩展,呈现一个中心多个环线的发展趋势。在此基础上建立了潜力模型,计算潜力指数和生成潜力指数图,潜力指数图呈现从四环以内向外围环线不断递增的趋势,说明北京市发展主要是农业用地发展为城市用地类型,这与北京北部2000年~2003年航空照片反映的变化规律一致,同时还介绍了利用潜力指数对2003年~2012年城市增长潜力的预测分析。更多还原

【Abstract】 Urbanization process is a major factor of change in Beijing city,and urbanization caused land cover change,which not only brings the prosperity of economics,but also leads to pollution and crowd transportation.Based on the long time-series of TM and ETM~+ data of Beijing city and a Self Organized Feature Map of Neural network(SOFM) classification method are developed for processing the TM and ETM+ data.The classification maps present the changes of five kinds of objectives,showing the urban expand dynamic track,in Beijing city from the year 1994 to 2003 on this paper.The urban expand process of Beijing city in passed decade shows that it centered the old city and surrounded the ring roads.On the support of analyzing of the trend of city expansion,a potential model is adopted that provides a general trend of urban expansion has approached the urban growth evolution.And then the potential index images are shown in the paper,from which we can see that the city expansion potential of Beijing city is increased by degrees from the inner fourth ring road to the sixth ring road,and also show that the transformation from farmlands to built-up areas is the main resource of urbanization.The phenomenon of urbanization in Beijing we has found has been tested on the airspaces of north Beijing.And then we applied the potential model to predict the urban growth potential from 2003 to 2012.In order to maintain the balance of land-use and referring to the actual situation of spatial structure of Beijing,we propose that the solid city will be suitable for the development of Beijing city.更多还原