哈尔滨市城市边缘区建设用地时空扩展过程分析

Analysis on Spatiotemporal Expansion Process of Construction Land in Urban Fringe of Harbin City

基于1976,1989,2001和2007年遥感影像资料,利用人机交互解译方法提取了哈尔滨市城市边缘区建设用地分布信息,借助地理信息系统技术的统计分析功能和空间分析功能,分析了哈尔滨城市边缘区建设用地扩展的数量特征和空间变异特征。结果表明,1976—2007年的31a间,哈尔滨市边缘区城市建设用地面积持续增加,其中2001—2007年间的城市扩展规模和速度最大;从建设用地的景观格局特征来看,1976—2001年以斑块数增加,紧凑度减小的分散扩展为主,2001年后以斑块数减少,紧凑度增大的扩展模式为主;哈尔滨市城市边缘区建设用地扩展具有明显的空间分异特征,这种特征表现在不同时段城市建设用地扩展的方向不同。

Based on the remote sensing images of 1976,1989,2001,and 2007,the land use information of urban fringe in Harbin City was extracted with the method of human-computer interaction.This paper focused on the quantitative characteristic and space variation characteristic about the urban fringe of Harbin City.Results showed that during the 31 years from 1976 to 2007,the urban area of the city increased persistently,especially between 2001 and 2007.From the landscape pattern of construction land,the number of patches increased and the compactness index decreased from 1976 to 2001,while it was opposite after the year of 2001.The expansion of construction land had the obvious space differentiation characteristic and the expansion of urban construction land can be reflected in various directions at different times.