Acta Geodaetica et Cartographica Sinica ›› 2019, Vol. 48 ›› Issue (3): 374-383.doi: 10.11947/j.AGCS.2019.20180010

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Precision global DEM generation based on adaptive surface filter and Poisson terrain editing

HU Han1,2, DING Yulin3,4, ZHU Qing3,5, JIANG Jie6, WEN Xuehu7, ZHANG Li8, TANG Wei7, YANG Jun9, ZHONG Ruofei10   

  1. 1. Department of Land Surveying and Geo-Informatics, the Hong Kong Polytechnic University, Hongkong, China;
    2. Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Land and Resources, Shenzhen 518000, China;
    3. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;
    4. Institute of Space and Earth Information Science, the Chinese University of Hongkong, Hongkong, China;
    5. Beijing Advanced Innovation Center for Imaging Technology, Capital Normal University, Beijing 100037, China;
    6. National Geomatics Center of China, Beijing 100830, China;
    7. The Third Geoinformation Mapping Institute of National Administration of Surveying, Mapping and Geoinformation, Chengdu 610100, China;
    8. Chinese Academy of Survey and Mapping, Beijing 100830;
    9. Heilongjiang Institute of Geomatics Engineering, Haerbin 150086, China;
    10. College of Environment and Tourism, Capital Normal University, Beijing 100037, China
  • Received:2018-01-08 Revised:2018-11-15 Online:2019-03-20 Published:2019-04-10
  • Supported by:
    The Open Fund of Key Laboratory of Urban Land Resources Monitoring and Simulation,Ministry of Land and Resources (Nos. KF-2016-02-021;KF-2016-02-022);The National Natural Science Foundation of China (Nos. 41631174;61602392;41501421;41471320);The Foundation of Key Laboratory for Geo-Environmental Monitoring of Coastal Zone of the National Administration of Surveying, Mapping and Geoinformation

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Abstract: Precision and high-resolution global DEM composes the fundamental basis of the spatial data infrastructure for a variety of applications. To obtain high precision global DEM using domestic high-resolution satellite images, is one of the most important requirements for the construction of global geographic information resources of China. However, due to the complexity of the structure of terrain surface, a single set of parameters is not capable to handle the intricacies of the ground characteristics, which leads to decreasing of accuracies. Aiming at solving this problem, this paper proposes an adaptive surface filter for automatic terrain filtering and Poisson terrain editing for post processing and quality control. The two contributions have been extended to the software framework, LINK, for the global DEM production. Experiments and production works by several departments, including the Sichuan, Heilongjiang, Shanxi, Hainan, Chongqing Bureau of Surveying, Mapping and Geoinformation, have revealed that the DEM quality satisfies with the standard set, including various difficult scenarios, such as building high-rise areas, forest and water body. The quality and efficiency of the proposed method exceed other competitive solutions, which indicates a strong potential for the on-going global DEM production of China.

Key words: global DEM generation, global DEM, adaptive surface filter, Poisson terrain editing

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