摘要
基于多时相Landsat卫星影像,综合运用基于像元变化的直接比较法和基于光谱分类的分类后比较法(分类精度达85.83%),提取出临港新城2002~2015年三个时相的城镇用地信息,分析城市扩张的变化特征,并通过相关社会经济统计资料对城市扩张的驱动因子进行相关研究。结果表明,2009年成建区面积比2002年增加18.745km^2,为2002年的2.12倍,2015年成建区面积较2009年增加24.945km^2,为2009年的0.9倍,年增长面积是前一阶段的1.33倍,处于城市空间扩张的第二大阶段,发展较为快速。运用单一因子相关分析法,计算得到经济因子和城镇用地面积的相关系数略大于人口因子与城镇用地面积的相关系数,且均与城镇用地面积成显著的正相关,而政策作为经济建设的导向推动因子,因此认为该区域驱动力主要表现在政策因素作用下的社会经济发展。
Multi-dimensional Landsat data analyses （a direct comparison method based on pixel changes and a post-classiifcation comparison method based on spectral classiifcation, with a classiifcation accuracy of 85.83%） were used to assess development of a new satelite city, Lingang New City, in Shanghai, by detecting urban land use patterns over the period 2002–2015; the data were extracted from Thematic Mapper （TM） images. According to the results, the developed area increased by 2.12 times （by 18.745 km2） from 2002 to 2009, and by 0.9 times （by 24.945 km2） from 2009 to 2015, representing a 1.33 times increase between the two growth stages （2002–2009 and 2009–2015）, and thus representing a period of rapid urban expansion. The study was conducted to identify the driving factors of urban expansion, by showing relationships between growth and social and economic statistics. As policies provide the overall guide for economic development, the driving forces in the region were considered to be social and economic factors, operating under the policy factor.
出处
《上海国土资源》
2015年第4期89-92,98,共5页
Shanghai Land & Resources
基金
山东省海洋生态环境与防灾减害重点实验室开放基金资助项目(2012011)
关键词
城市扩张
驱动机制
城镇用地面积变化
卫星影像信息提取
urban expansion
driving mechanism
change of city land-use area
information extract from satelite images
