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基于时序Landsat数据的地理国情监测方法初探

DOI: 10.6046/gtzyyg.2015.02.20, PP. 126-132

Keywords: 长时间序列,地理国情监测,指标体系,时空变化,驱动因素

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Abstract:

为全面掌握地表自然和人文地理国情信息,基于北京市海淀区1986—2010年间8个不同时相的Landsat数据,分析了海淀区资源与环境要素的时空变化特点,讨论了其中的驱动因素。结果表明:在1986—2010年间,耕地面积减少了45.7%,建设用地面积增加了38.95%,林、草地面积增加了23.44%,水体和其他用地面积变化不明显;城市范围向西、向北方向扩展,在西北旺地区表现得尤为明显;城市质心向西北方向偏移;城市紧凑度逐渐减小,分形指数逐渐增大,反映出城市饱和程度降低,城市边界逐步复杂化,综合土地利用动态度呈先减小后增大的趋势。因此认为,人口的增长、经济的发展、基础设施的建设以及政策法规的制定等,都促进了北京市海淀区资源与环境要素的变化。

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