[1]高志远,谢元礼,刘状,等.陕北黄土区SRTMDEM精度对不同地形因子的响应[J].水土保持研究,2019,26(03):174-178.
　GAO Zhiyuan,XIE Yuanli,LIU Zhuang,et al.Response of SRTM DEM Accuracy to Different Terrain Factors in the Loess Area of Northern Shaanxi Province[J].Research of Soil and Water Conservation,2019,26(03):174-178.
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陕北黄土区SRTMDEM精度对不同地形因子的响应

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年03期 页码: 174-178 栏目: 出版日期: 2019-04-12
Title:
Response of SRTM DEM Accuracy to Different Terrain Factors in the Loess Area of Northern Shaanxi Province
作者:
高志远1,2, 谢元礼1,2, 刘状1,2, 蒋广鑫1
1. 西北大学, 西安 710127;
2. 陕西省地表系统与环境承载力重点实验室, 西安 710127
Author(s):
GAO Zhiyuan1,2, XIE Yuanli1,2, LIU Zhuang1,2, JIANG Guangxin1
1. College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China;
2. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Northwest University, Xi’an 710127, China
关键词:
ICESat/GLAS; SRTMDEM; 地形因子; 地理探测器; 分形维数
Keywords:
ICESat/GLAS; SRTM DEM; terrain factors; geographical detector; fractal dimension
分类号:
P237
摘要:
以陕北黄土沟壑区域作为研究区，以1弧秒SRTM DEM数据作为研究对象，以ICESat/GLAS的GLA14高程数据作为高程参考数据，利用地理探测器的空间分异性研究方法，来研究高程、坡度、坡向、总曲率、剖面曲率以及平面曲率等地形因子对SRTM DEM数据精度的影响，并结合其影响研究了地表粗糙度与SRTM DEM精度之间的相关关系。结果表明：源数据SRTM DEM在研究区范围内系统误差为（0.470±9.520） m，精度为9.531 m。单地形因子对SRTM DEM精度的影响要比不同因子两两综合的影响小，其中坡度因子和曲率因子对精度的影响程度较大，高程、坡向因子对精度的影响程度较小。分形维数较常见的几种地形因子对数据精度的影响程度更大，分形维数与数据中误差呈现二次多项式的关系，并且随着分形维数的增加，SRTM DEM中误差逐渐增大，增长率逐渐减小，直到峰值。
Abstract:
We focused on the relationship between the accuracy of DEM and terrain factors. The gullies region of Northern Shaanxi was taken as the research area. In terms of elevation reference data, the vertical accuracy of ICESat/GLAS GLA14 data can reach 18 cm and the horizontal accuracy can reach 20 cm, which is used as the reference data of elevation standard. To study the influence of six topographic factors such as elevation, slope, aspect, total curvature, section curvature and plane curvature on the accuracy of SRTM DEM data, We not only used the geographical detectors analysis method, but also used the fractal dimension method to probe into the relationship between surface roughness and the SRTM DEM accuracy. Fractal dimension, as a dimensionless parameter, can better express the differentiation characteristics of the surface and preserve the original morphological characteristics of the surface. The results show that accuracy of the SRTM DEM is 9.531 meters in the study area. The influence of single terrain factor on the precision of SRTM DEM is smaller than that of different factor superposition, in which slope factor and curvature factor have great influence on accuracy, and the influence of elevation and aspect factor on accuracy is relatively small. The fractal dimension has a greater influence on the accuracy of data, and RSME of SRTM DEM increases gradually, and the growth rate decreases gradually until the peak value with the increase of fractal dimension.

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相似文献/References:

[1]吴宇鑫,赵牡丹,高志远,等.中国3类典型区SRTMGL1和SRTMV4精度对比分析[J].水土保持研究,2019,26(04):36.
　WU Yuxin,ZHAO Mudan,GAO Zhiyuan,et al.Comparison Analysis of Accuracy of SRTMGL1 and SRTM V4 in Three Typical Regions of China[J].Research of Soil and Water Conservation,2019,26(03):36.

备注/Memo

收稿日期:2018-07-13;改回日期:2018-07-29。
基金项目:中国科学院A类战略性先导科技专项”地球大数据科学工程”（XDA19070302）
作者简介:高志远(1993-),男,陕西西安人,硕士研究生,研究方向为地图学与地理信息科学研究。E-mail:799535434@qq.com
通讯作者:谢元礼(1968-),男,湖南衡阳人,硕士,副教授,从事遥感与GIS研究。E-mail:37911220@qq.com

更新日期/Last Update: 1900-01-01