摘要
本研究以长时间序列的Landsat MSS/TM/OLI遥感影像为基础数据源,采用面向对象的分类方法提取获得1970s-2015年长春市城市建设用地信息,通过构建年均扩展指数模型、凸壳边界、空间样带梯度区域和土地利用转移矩阵等方法来分析近40多年来长春市城市建设用地变化特征。结果表明:从城市扩张速度来看,1970s-2015年间,高速扩展单元数呈上升趋势,城市扩张速度加快;从城市扩张类型来看,在5个时段内长春市城市扩张类型分别为填充型、外延型、填充型、外延型、填充型;从城市扩张的方向特征来看,长春市总体为中心城区外扩模式;从土地利用类型转化来看,1970s-2015年长春市4种建设用地类型面积均为增长趋势,彼此之间存在着不同程度的转化。
Based on a long - term series of Landsat MSS/TM/OLI remote sensing images, we extracted the information of urban built - up land in Changchun city during 1970s - 2015 using the object - oriented classification method, and analyzed the characteristics of expansion speed, intensity, type, direction, the transfer of built - up land in Changchun city for nearly 40 years by constructing an average annual expansion exponential model, convex hull boundary, spatial transect gradient regions and land transfer matrix. The results showed that： from the point of view of urban expansion speed, from 1970s to 2015, high - speed expansion unit numbers were on the rise and the process of urban expansion was accelerated. As for the urban expansion type, for the 5 periods （ 1970s - 1980s, 1980s - 1990,1990 - 2000,2000 - 2010,2010 - 2015 ）, the urban expansion types of Chang- city were filling type, extension type, filling type, extension type and filling type, respectively. From the view of expanding orientation, Changchun is the central urban area outward expansion mode. Analysis result from land use transfer matrix showed that during 1970s-2015,4 kinds of builtup land in Changchun were all in the growth trend and there were transfer processes among each other.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第3期21-25,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(41471148
41071332)资助
关键词
城市扩张
年均扩展指数
凸壳边界
空间样带
转移矩阵
长春市
urban sprawl
average annual expansion exponential
convex hull
spatial sampling
transfer
Changchun
