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引入地形表达误差(terrain representation error,Etr),选择标准曲面和甘肃省董志塬地区作为研究对象,利用窗口分析法实现Etr的提取;用统计分析法得出Etr随网格分辨率变化的回归方程;根据误差传播定律计算DEM中误差。数值结果表明,该方法能更准确的计算HASM生成的DEM精度;相同的采样数下,HASM较传统方法(IDW,Spline和Kriging)能生成更高精度和分辨率的DEM。在难以获取已知数据的地区,HASM提供了生成相对准确DEM的高效工具。 更多还原

【Abstract】 In former researches,High Accuracy Surface Modelling(HASM) constructed based on the fundamental theory of surface is more accurate than the classical methods in DEM construction.In order to give HASM a full evaluation,this paper introduced terrain representation error(Etr),which was calculated by multi-resolution comparative analysis.Terrain representation model was built,which was regressed against resolution.The total DEM simulation error containing interpolation RMSE, Etr,etc.,is calculated i... 更多还原