基于条件模拟的DEM误差曲面实现研究

被引:5
作者
陈传法
岳天祥
机构
[1] 中国科学院地理科学与资源研究所
基金
国家杰出青年科学基金;
关键词
精度; 误差; 条件模拟; 坡度; DEM;
D O I
10.13203/j.whugis2010.02.022
中图分类号
P208 [测绘数据库与信息系统];
学科分类号
070503 ; 081603 ; 0818 ; 081802 ;
摘要
为了克服DEM全局误差指标描述DEM精度的缺陷,基于条件模拟(CS)实现了DEM误差曲面的构建。构建了甘肃省董志塬某测区DEM误差曲面,并与普通Kriging(OK)插值结果进行了比较。结果表明,OK具有明显的平滑效应,而CS能准确反映DEM误差的空间波动性。DEM误差对坡度精度的影响分析表明,相比地形复杂的区域,DEM误差严重影响平坦区域的坡度精度;对测区水土流失等级划分结果的分析表明,约有70.2%的网格点的等级划分受DEM误差的影响。
引用
收藏
页码:197 / 200
页数:4
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