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测绘学报  2015 

顾及非线性地形因子的地表面积计算

DOI: 10.11947/j.AGCS.2015.20130816, PP. 330-337

Keywords: 地理国情监测,地表面积,地形因子,数字高程模型,泰勒级数,空间内插

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Abstract:

研究地表面积统计数学模型及其影响因素,消除不同分辨率DEM计算所得地表面积的差异,对综合利用多尺度DEM数据精确统计和监测地表面积具有重要意义.本文研究提出了一种顾及复杂地形因子的地表面积统计方法.该方法首先利用泰勒级数逼近原理对微观地形因子进行最小二乘估计,然后利用这些地形因子对DEM和多边形区域边界进行加密,最后利用加密后的DEM和多边形边界构建地表三角网统计地表面积.试验表明,在局部地形因子显著的山区或丘陵地区,使用不同分辨率DEM所统计的地表面积存在较大的差异,而顾及地形因子的地表面积统计方法可明显提高低分辨率DEM地表面积统计精度.

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