Analysis on Mechanism and Spatial-temporal Features of Urban Sprawl:A Case Study of Changchun
利用GIS和遥感技术分析长春城市蔓延的时空特征，并结合统计数据探讨其与社会经济的协调性，识别出大型项目建设、郊区房地产发展、机动化与交通设施建设、政府行政决策及城市规划失控等驱动因素。
At present,urbanization of China is in an acceleration stage.Urban sprawl exists in majority cities,which has serious destruction of ecological environment in urban fringe.Firstly,by means of GIS and RS technology,we analyze spatial-temporal features and discipline of urban sprawl based on remote sensing images of Changchun,the compact ratio,fragmentation degree,the degree of shaft extension,geometric center of gravity and so on.In addition,combined with relevant statistical information,we analyze the coordination of urban sprawl and social economy.Finally,we consider that construction of large-scale projects,development of real estate in suburbs,motorization and construction of traffic facilities,the role of government administrative decisions,and the runaway urban planning,have contributed to the urban sprawl of Changchun.