测绘通报 ›› 2019, Vol. 0 ›› Issue (11): 39-43.doi: 10.13474/j.cnki.11-2246.2019.0348

• 学术研究 • 上一篇    下一篇

利用GLAS激光测高数据评估DSM产品质量及精度优化

胡柳茹1,2,3, 唐新明1,2, 李国元2, 付冬暇3, 窦显辉2, 赵世湖2   

  1. 1. 山东科技大学测绘科学与工程学院, 山东 青岛 266590;
    2. 自然资源部国土卫星遥感应用中心, 北京 100048;
    3. 自然资源部第一地形测量队, 陕西 西安 710054
  • 收稿日期:2019-05-08 修回日期:2019-06-26 发布日期:2019-12-02
  • 通讯作者: 唐新明。E-mail:tangxinming99@qq.com E-mail:tangxinming99@qq.com
  • 作者简介:胡柳茹(1991-),女,硕士生,研究方向为激光测高卫星数据处理。E-mail:hulr@qq.com
  • 基金资助:
    高分辨率对地观测系统重大专项应用共性关键技术项目(11-Y20A13-9001-17/18);国家重点研发计划战略性国际科技创新合作重点专项项目(2016YFE0205300)

Quality assessment and accuracy optimization of DSM using GLAS laser altimetry data

HU Liuru1,2,3, TANG Xinming1,2, LI Guoyuan2, FU Dongxia3, DOU Xianhui2, ZHAO Shihu2   

  1. 1. College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China;
    2. Land Satellite Remote Sensing Application Center, MNR, Beijing 100048, China;
    3. The First Topographic Surveying Brigade, MNR, Xi'an 710054, China
  • Received:2019-05-08 Revised:2019-06-26 Published:2019-12-02

摘要: 提出了一种利用卫星激光测高数据直接优化提升数字表面模型(DSM)产品精度的方法。选取境外中亚地区的资源三号DSM开展试验,通过采用多准则约束方法提取激光高程控制点,分别利用偏度、中值、线性、二次多项式等进行DSM误差修正,发现4种模型均能有效消除DSM系统误差,其中基于二次多项式的方法更适用于平地和丘陵地貌,线性模型更适用于高山地貌。试验验证了采用卫星激光测高数据优化境外DSM技术流程的可行性,最终可提高DSM的绝对高程精度。

关键词: 卫星激光测高, 数字表面模型, 高程控制点, 精度优化, 质量验证

Abstract: In this paper, a new method using satellite laser altimetry data directly is proposed to optimize and improve digital surface model (DSM) product accuracy. The experiment is implemented in central Asia, and DSM is produced by ZY-3 satellite. The elevation control points are selected from laser altimetry data based on multi-criteria constraint. Then DSM is corrected by the elevation control points using skewness, median, linear polynomial, quadratic polynomial model. The four models can effectively eliminate DSM systematic errors. In addition, the quadratic polynomial model is more applicable to flat and hilly land, and the linear polynomial is more applicable to alpine region. Preliminary test results show that the technical process of DSM accuracy optimization based on satellite laser altimetry data is feasible and the elevation accuracy of DSM is favorable after correction by the four models.

Key words: satellite laser altimetry, digital surface model, geodetic ground control, accuracy optimization, quality validation

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