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地理研究  2013 

Landsat-7ETM+与ASTER建筑指数的定量比较

, PP. 1336-1344

Keywords: Landsat,ETM+,ASTER,NDBI,IBI,交互比较,光谱响应函数

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Abstract:

城市化进程导致的城市建筑用地急剧扩张已对全球的环境资源产生了负面影响,因此亟需对其进行监测。在中尺度卫星对地观测系统中,Landsat和ASTER数据最适合于监测城市建筑用地变化。但是迄今为止,这两种传感器数据的建筑指数之间的关系并不清楚。因此,利用三对同日过空的ETM+和ASTER影像来查明二者建筑指数(IBI、NDBI)之间的定量关系,通过回归统计分析来求出两种传感器建筑指数之间的转换方程。结果表明,ETM+和ASTER的建筑指数既有相似性,也存在着明显的差异,ASTER反演的建筑指数均值可大于ETM+达48.6%,因此二者在实际应用中不宜直接进行对比,而应通过转换方程进行转换后才能对比。分析表明,两种传感器建筑指数之间的差异是二者在NIR和SWIR波段之间的光谱差异造成的。

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