| 全球高分辨率数字高程模型研究进展与展望 |
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| 引用本文： | 李振洪,李鹏,丁咚,王厚杰.全球高分辨率数字高程模型研究进展与展望[J].武汉大学学报(信息科学版),2018,43(12):1927-1942. |
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| 作者姓名： | 李振洪 李鹏 丁咚 王厚杰 |
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| 作者单位： | 1.英国纽卡斯尔大学工程学院, 英国 纽卡斯尔, NE1 7RU |
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| 基金项目： | 国家自然科学基金41806108国家自然科学基金41606066国家重点研发计划2016YFA0600903山东省自然科学基金ZR2016DB30中国博士后科学基金2016M592248青岛市自主创新计划应用基础研究16-5-1-25-jch中央高校基本科研业务费201713039英国自然环境研究理事会项目COMET: come30001英国自然环境研究理事会项目LICS: NE/K010794/1英国自然环境研究理事会项目CEDRRIC: NE/N012151/1 |
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| 摘 要： | 简要介绍了数字高程模型（digital elevation model，DEM）的起源与定义，根据4种不同的观测平台分类介绍了DEM数据获取方法，给出目前国际上发布的高分辨率全球DEM的主要性质和特点。重点介绍了9大类全球DEM，分析了DEM质量评估相关的评定方法和精度指标。论述了DEM在地质灾害监测、海岸带脆弱性分析方面的应用，以美国地质勘探局和德国航空太空中心正在开展的DEM项目为例，讨论了高精度、高分辨率全球同质DEM和地形测深高程模型的最新需求，最后总结展望全球高分辨率DEM的发展趋势。
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| 关 键 词： | 数字高程模型 合成雷达干涉测量 光学立体像对 地质灾害 质量评估 |
| 收稿时间： | 2018-07-25 |
Research Progress of Global High Resolution Digital Elevation Models |
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| Affiliation: | 1.School of Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, United Kingdom2.Key Lab of Submarine Geosciences and Prospecting Technology, Institute of Estuarine and Coastal Zone, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China3.Laboratory of Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China |
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| Abstract: | There are many geologic processes that shape the surface of the Earth, and the evolution of topography provides us clues to the interior of the Earth and the forces that exist there. Firstly, in this paper, the origin and definition of digital elevation models (DEMs) are briefly introduced followed by their common acquisition methods according to ground-based, shipborne, airborne and spaceborne observation platforms. Secondly, the main characteristics of existing global high resolution DEMs are demonstrated with emphasis on nine commonly-used global DEMs. Thirdly, a common procedure for DEM quality evaluation is presented. Fourthly, the potential applications of DEMs to geological disaster monitoring and coastal vulnerability analysis are described. Taking the ongoing DEM projects in USGS (United States Geological Survey) and DLR (Deutsches Zentrum für Luft-und Raumfahrt) as examples, the requirements for high precision high resolution globally consistent and homogeneous DEMs and topobathemetric elevation models are discussed. Finally, the future trends and prospects of global high resolution DEMs are summarized. We find that fusion of multi-source remote sensing image data (such as LiDAR, SAR and optical remote sensing) has become an important approach to ge-nerate global multi-scale seamless DEMs, and the use of unmanned aircrafts and ships as observation platforms makes it possible to shorten the renewal cycle of high precision high resolution DEMs. |
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