| 基于改进反距离加权算法的海底DEM建模方法 |
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| 引用本文： | 王可伟,高利华,江锋.基于改进反距离加权算法的海底DEM建模方法[J].海洋测绘,2021,41(1):61-64. |
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| 作者姓名： | 王可伟 高利华 江锋 |
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| 作者单位： | 92899部队,浙江宁波 315200 |
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| 摘 要： | 为了实现海底地形三维可视化,首先需要对海量多波束离散水深数据进行DEM建模处理。其中,基于反距离加权网格化的内插法原理简单、效率较高,生成的DEM模型较为贴近海底实际底面,适用于海底地形数字建模。但本文在实际建模过程中发现传统反距离加权算法在理论上存在缺陷,因此本文引入圆形窗口和夹角权因子对插值算法进行进一步改进。实例表明,改进反距离加权算法可以有效提高海底DEM的建模效率与精度。
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| 关 键 词： | 三维可视化 数字化高程模型 反距离加权 圆形窗口 夹角权因子 |
A Method of Seabed DEM Modeling Based on the Improved Inverse Distance Weighted Interpolation Algorithm |
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| WANG Kewei,GAO Lihu,JIANG Feng.A Method of Seabed DEM Modeling Based on the Improved Inverse Distance Weighted Interpolation Algorithm[J].Hydrographic Surveying and Charting,2021,41(1):61-64. |
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| Authors: | WANG Kewei GAO Lihu JIANG Feng |
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| Institution: | 92899 Troops,Ningbo 315200 ,China |
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| Abstract: | In order to realize 3D visualization of seabed terrain,first of all,the DEM modeling of massive multi-beam discrete water depth data is needed.The interpolation method based on the inverse distance weighted method is simple and efficient,and the generated DEM model is close to the bottom of the seabed,which is applicable to the digital modeling of the seabed terrain.However,in the actual modeling process,it is found that the traditional inverse distance weighted algorithm has some defects in theory.So in this paper the circular window and the angle weight factor are introduced to improve the interpolation algorithm.The practical results show that the improved algorithm can effectively increase the modeling efficiency and accuracy of seabed DEM. |
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