摘要
为探究ASTER GDEMV3、SRTM1 DEM和AW3D30 DEM 3种开源DEM数据的高程精度,本文以高精度ICESat-2 ATLAS测高数据为参考数据,利用GIS统计分析、误差相关分析及数理统计对DEM的高程精度进行对比评价。结果表明:(1)AW3D30的质量最稳定;SRTM1 DEM在平原精度最高;在高原山地精度由高到低依次为AW3D30 DEM、ASTER GDEMV3、SRTM1 DEM。(2)DEM数据高程精度受地表覆盖影响较大,且与地形因素密切相关,在相同地表覆盖的两个研究区中DEM数据高程精度表现情况不一致,SRTM在平原地表覆盖下精度表现最好,平均误差为3.15 m,AW3D30 DEM在山地地表覆盖下精度表现最好,平均误差为7.61 m。(3)坡度对DEM数据的高程精度影响较大,在两个研究区3种DEM数据的高程误差均随坡度的增加而增加;坡向对DEM数据的高程精度影响较小,未发现明显的规律。
In order to investigate the elevation accuracy of three open source DEM data,ASTER GDEMV3、SRTM1 DEM and AW3 D30 DEM.In this paper,high precision ICESat-2 ATLAS altimetry data is used as reference data,comparative evaluation of elevation accuracy of DEM using GIS statistical analysis,error correlation analysis and mathematical statistics.The results show that:(1)The quality of AW3 D30 is the most stable;SRTM1 DEM has the highest accuracy in the plains;the accuracy in the highland mountains is AW3 D30 DEM,ASTER GDEMV3,and SRTM1 DEM in descending order.(2)The elevation accuracy of DEM data is influenced by the surface coverage and is closely related to the topographic factors.The performance of DEM data elevation accuracy in the two study areas with the same surface coverage is not consistent,SRTM has the best performance under the plain surface coverage with an average error of 3.15 m,and AW3 D30 DEM has the best performance under the mountainous surface coverage with an average error of 7.61 m.(3)The influence of slope on the elevation accuracy of DEM data is large,and the elevation error of three kinds of DEM data in two study areas increases with the increase of slope;the influence of slope direction on the elevation accuracy of DEM data is small,and no obvious pattern is found.
作者
丁夏萌
张继贤
郭婧
张鹤
常亚茹
DING Xiameng;ZHANG Jixian;GUO Jing;ZHANG He;CHANG Yaru(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;Chinese Acadcmy of Surveying&Mapping,Beijing 100830,China;National Quality Inspection and Testing Center for Surveying and Mapping Products,Beijing 100830,China;College of Geomatics,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《测绘通报》
CSCD
北大核心
2022年第12期84-90,共7页
Bulletin of Surveying and Mapping
基金
国家自然科学基金(41671440)
自然资源部项目(121134000000180009)
国家测绘产品质量检验测试中心“质量之翼”项目(2019-zlzy-008)。
