基于遥感监测的北京1984—2007年城市扩展研究

URBAN GROWTH IN BEIJING FROM 1984 TO 2007 AS GAUGED BY REMOTE SENSING

基于1984—2007年间8个时相的Landsat-5TM数据,对北京城市扩展进行了研究.通过一种基于遥感监测的城市范围提取方法,确定了各时相的城市范围;然后结合城市扩展速率、扩展强度、分形维数和紧凑度4个指数,对城市扩展的数量特征、形态变化、空间特征进行了分析,讨论了城市扩展的时空特征.

Urban growth is a key issue for urbanization research.Urban growth in Beijing was studied by examining 8 phases of Landsat5 TM images from 1984 to 2007.Urbanization was scaled from those remote sensing monitoring for each of the 8 phases;The index of urban growth rate,urban growth intensity,fractal dimension and compact ratio were combined.Quantitative characteristics,morphology changes and spatial pattern of urban growth were analyzed.The spatiotemporal pattern of urban growth was then outlined.