| 非航海用DDM向航海应用转换的方法 |
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| 引用本文： | 曹鸿博,张立华,黄文骞,贾帅东,刘现鹏.非航海用DDM向航海应用转换的方法[J].测绘通报,2018,0(1):83-87. |
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| 作者姓名： | 曹鸿博 张立华 黄文骞 贾帅东 刘现鹏 |
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| 作者单位： | 1. 海军大连舰艇学院海洋测绘系, 辽宁 大连 116018;
2. 海军大连舰艇学院海洋 测绘工程军队重点实验室, 辽宁 大连 116018;
3. 海军出版社, 天津 300450 |
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| 摘 要： | 针对非航海用数字水深模型（DDM）不能直接应用于航海上的这一问题，提出了一种基于水深不确定度拟合面的非航海用DDM向航海应用转换的方法。采用不确定度合成方法计算原始水深不确定度对非航海用DDM建模点的传递不确定度；利用测试点检验法估算非航海用DDM网格的地形描述不确定度，进而合成建模点的综合不确定度；基于模型网格双线性法构建非航海用DDM的水深不确定度拟合面，并推估模型内任一点的水深不确定度，以提高转换后非航海用DDM的深度保证率。试验证明：所提方法切实可行，能够较大程度地提高转换后非航海用DDM的深度保证率，以满足舰船的安全航海需求。
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| 关 键 词： | 数字水深模型 不确定度合成方法 地形描述不确定度 网格双线性法 深度保证率 |
| 收稿时间： | 2017-07-27 |
| 修稿时间： | 2017-08-31 |
A Method of the Transformation from DDM for Non-navigation to DDM for Navigation |
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| CAO Hongbo,ZHANG Lihua,HUANG Wenqian,JIA Shuaidong,LIU Xianpeng.A Method of the Transformation from DDM for Non-navigation to DDM for Navigation[J].Bulletin of Surveying and Mapping,2018,0(1):83-87. |
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| Authors: | CAO Hongbo ZHANG Lihua HUANG Wenqian JIA Shuaidong LIU Xianpeng |
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| Institution: | 1. Department of Hydrography and Cartography, Dalian Naval Academy, Dalian 116018, China;
2. Key Military Laboratory of Marine Surveying and Mapping Engineering, Dalian Maritime University, Dalian 116018, China;
3. Navy Press, Tianjin 300450, China |
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| Abstract: | Aiming at the problem that digital depth model (DDM) for non-navigation can't be directly applied to navigation, a method of the transformation from DDM for non-navigation to navigation based on the fitting surface of depth uncertainty is proposed. Uncertainty propagation of modeling point of DDM for non-navigation is calculated by the original depth uncertainty based on uncertainty synthetic method.Terrain representation uncertainty of DDM for non-navigation is estimated based on test point method, and then comprehensive uncertainty of modeling point is acquired.The uncertainty fitting surface is constructed based on grid bilinear method by comprehensive uncertainty of modeling points of DDM for non-navigation, and depth uncertainty at any point in the DDM is estimated to improve the probability of an adequate depth of DDM for non-navigation.The experimental results demonstrate that the proposed method is feasible and can greatly improve probability of an adequate depth of DDM for non-navigation, so as to meet the requirements of the safety of ship navigation. |
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| Keywords: | digital depth model terrain representation uncertainty uncertainty synthetic method grid bilinear method probability of an adequate depth |
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