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冰川冻土  2014 

四种南极数字高程模型的精度比较与分析

DOI: 10.7522/j.issn.1000-0240.2014.0077, PP. 640-648

Keywords: 南极,冰盖,数字高程模型,卫星测高,ICESat

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Abstract:

南极数字高程模型(DEM)是南极冰盖研究的基础数据,目前国际通用的全南极DEM数据主要有JLB97DEM、RAMPv2DEM、ICESatDEM以及Bamber1kmDEM.利用DEM对DEM验证的方式对四种DEM的精度进行比较分析.结果表明Bamber1kmDEM和ICESatDEM之间的高程差异最小,平均高程差小于1.8m,二者均有较高的可靠性.RAMPv2DEM与Bamber1kmDEM的高程差大于1.9m,在81.5°S以南和坡度较大的区域,高程差异更为明显,高程可靠性较低.JLB97DEM与上述三种DEM的偏差超过10m,高程可靠性最低.

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