| 不同类型DDM相互应用的质量分析 |
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| 引用本文： | 曹鸿博,张立华,张梅彩,夏雷.不同类型DDM相互应用的质量分析[J].海洋测绘,2017(5):64-67. |
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| 作者姓名： | 曹鸿博 张立华 张梅彩 夏雷 |
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| 作者单位： | ;1.海军大连舰艇学院海洋测绘系;2.海军大连舰艇学院海洋测绘工程军队重点实验室;3.海军出版社 |
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| 基金项目： | 国家自然科学基金(41471380) |
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| 摘 要： | 数字水深模型的应用通常可分为航海和非航海两大类型。从航海与非航海DDM的不同应用需求出发,分别构建了航海和非航海DDM,比对分析了不同类型DDM相互应用时的质量情况。实验证明,航海DDM的模型中误差相对较大,模型产生了系统性偏移,应用于非航海时模型质量会相对降低,且这种降低的程度随着比例尺的缩小而增大;非航海DDM未考虑航海安全性需求,会引起模型深度保证率指标明显偏低,且随比例尺不断缩小而偏低更明显,从而不能直接应用于航海。
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| 关 键 词： | 海洋测绘 数字水深模型 中误差 整体偏差值 深度保证率 深度表达度 |
A Quality Analysis of Exchanged Applications of Different Types of Digital Depth Models |
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| CAO Hongbo,ZHANG Lihu,ZHANG Meicai,XIA Lei.A Quality Analysis of Exchanged Applications of Different Types of Digital Depth Models[J].Hydrographic Surveying and Charting,2017(5):64-67. |
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| Authors: | CAO Hongbo ZHANG Lihu ZHANG Meicai XIA Lei |
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| Abstract: | Digital Depth Model (DDM) is usually used either for navigation or for non-navigation.DDMs for navigation and non-navigation are respectively constructed based on their different requirements.The qualities,which are expressed when different types of DDMs are exchanged (DDM for navigation applied to non-navigation or DDM for non-navigation applied to navigation),are compared and analyzed.The experimental results demonstrate:the mean square error of DDM for navigation is larger than that of DDM for non-navigation,and a systematic offset is generated along shallow direction in DDM for navigation.The accuracy of DDM for navigation is lowered when applied to non-navigation,and the lowered degree becomes larger with a smaller scale.DDMs for non-navigation,without considering navigation safety,make the probability of an adequate depth obviously low,and it becomes lower with a smaller scale.Thus,DDM for non-navigation cannot be directly applied to navigation. |
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