基于多时相卫星遥感数据的上虞城市用地动态扩展分析

采用地形图和MSS/TM,SPOT5卫星遥感数据,提取城市建成区范围,计算多种城市扩展指数,研究分析了1976~2010年上虞城市用地扩展情况。研究发现,20世纪70年代至21世纪10年代,上虞城市用地扩展面积和强度在最初爆发性增长后,保持高位稳定。城市紧凑度指数持续降低,城市分形维度在大幅下降后保持稳定,城市发展日益复杂化,边缘日益曲折、破碎化。今后市政规划建设应着力发展建设城市用地边缘离散曲折之处,提高城市紧凑度,降低分形维度,从而提高城市区域市政服务职能效率。

A Study on Urban Expansion of Shangyu City Based on Multi-Temporal Satellite Remote Sensing Data

In this study, topographic map and MSS/TM, SPOT5 satellite remote sensing data were used to extract the boundaries of urban land of Shangyu city .GIS technology with a measure of different urban expansion indexes gives a hand to analysis Shangyu urban land expansion .We have found that from the 1970 s to the 2010 s, Shangyu urban land had been expanding .The extension strength in-dex maintained a high stability after explosive growth in the early period .The city compact index was continually reducing while the urban sub-type dimension index remained stable after substantial decline .Urban areas have become increasingly complex while the boundaries have become tortuous and broken .Thus, future municipal planning and construction should be focus on urban compact and improving the efficiency of urban service functions .