基于ICESat-2/ATL08的新疆昆仑山地区全球多源DEM数据精度验证与评价  

Accuracy validation and evaluation of global multi-source DEM data in the Kunlun Mountains of Xinjiang based on ICESat-2/ATL08

作　　者：章诗芳 赵尚民[2] 樊晶莹 ZHANG Shifang;ZHAO Shangmin;FAN Jingying(School of Traffic Engineering,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030619;College of Geological and Surveying Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]山西工程科技职业大学交通工程学院,山西晋中030619 [2]太原理工大学地球科学与测绘工程学院,山西太原030024

出　　处：《地理与地理信息科学》2025年第2期40-46,共7页Geography and Geo-Information Science

基　　金：国家自然科学基金面上项目(42271432);山西工程科技职业大学校基金项目(KJ202426);科技部中欧“龙计划”六期项目(95177);山西省科技厅科技合作交流专项项目(202304041101051)。

摘　　要：对全球多源DEM数据的高程精度进行验证与评价可为其在不同领域的广泛应用提供可靠性保障。该文以激光雷达测量卫星ICESat-2/ATL08测高数据为参考数据,利用数字地形分析法和数理统计法对新疆昆仑山地区的全球6种DEM数据(SRTM1 DEM、NASA DEM、AW3D30 DEM、COP DEM、FAB DEM和ASTER GDEM)在不同地形指标和地表覆盖类型下的高程精度进行了验证与评价。结果表明:①FAB DEM整体精度最高,其均方根误差、平均误差、平均绝对误差和标准差分别为6.24 m、-1.83 m、3.01 m和3.01 m。②FAB DEM在平原、台地和丘陵地区精度最高,AW3D30 DEM在山地地区精度最高,6种DEM数据的精度均随坡度增大而降低,当坡度大于15°时,AW3D30 DEM精度最高,在北向和南向的精度均高于东向和西向。③对于不同地表覆盖类型,在耕地、草地、人造地表、其他地表类型下精度最高的分别是NASA DEM、AW3D30 DEM、COP DEM、FAB DEM。Validating and evaluating the elevation accuracy of global multi-source DEM data can provide reliability guarantee for its wide application across diverse fields.Based on the altimetry data of ICESat-2/ATL08,the elevation accuracy of global multi-source DEM data(including SRTM1 DEM,NASA DEM,AW3D30 DEM,COP DEM,FAB DEM and ASTER GDEM)in the Kunlun Mountains of Xinjiang is evaluated using the methods of digital topographic analysis and mathematical statistics and under different topographic indexes and land cover types.It is found as follows.①FAB DEM exhibits the highest overall accuracy.Its root mean square error,mean error,mean absolute error and standard deviation are 6.24 m,-1.83 m,3.01 m,and 3.01 m respectively.②FAB DEM demonstrates the highest accuracy in plain,tableland and hilly areas,while AW3D30 DEM shows the best performance in mountainous areas.The accuracy of the six DEM datasets decreases as the slope increases.Specifically,for areas where the slope is greater than 15°,the AW3D30 DEM has the highest accuracy.Additionally,their accuracy in the north-facing and south-facing directions is higher than that in the east-facing and west-facing directions.③As to the different land cover types,the DEMs with the highest accuracy in cultivated land,grassland,artificial surfaces,and other land cover types are NASA DEM,AW3D30 DEM,COP DEM,and FAB DEM respectively.

关 键 词：全球多源DEM数据 精度评价 ICESat-2/ATL08测高数据 数字地形分析 新疆昆仑山地区 

分 类 号：P237[天文地球—摄影测量与遥感] P208[天文地球—测绘科学与技术]