| 基于不完全四叉树的数字水深模型多尺度表达 |
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| 引用本文： | 陈轶,彭认灿,张立华,董箭.基于不完全四叉树的数字水深模型多尺度表达[J].海洋测绘,2017(6):21-24. |
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| 作者姓名： | 陈轶 彭认灿 张立华 董箭 |
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| 作者单位： | ;1.91550部队;2.海军大连舰艇学院海洋测绘系 |
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| 基金项目： | 国家自然科学基金(4160010956) |
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| 摘 要： | 空间数据的多尺度表达问题是GIS领域研究的重点和难点问题之一。以数字水深模型(DDM)为研究对象,从DDM的几何形态角度出发,通过挖掘水深点之间的空间几何关系,构建了基于不完全四叉树的DDM多尺度表达模型。实验证明,该模型在符合DDM多尺度表达基本原则的前提下,能较好地保持DDM的基本地形特征,同时具有较高的计算效率。
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| 关 键 词： | 数字水深模型 几何形态 地形特征 不完全四叉树 多尺度表达 |
Multi-scale Representation of Digital Depth Model Based on Unfull Quatree |
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| CHEN Yi,PENG Rencan,ZHANG Lihu,DONG Jian.Multi-scale Representation of Digital Depth Model Based on Unfull Quatree[J].Hydrographic Surveying and Charting,2017(6):21-24. |
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| Authors: | CHEN Yi PENG Rencan ZHANG Lihu DONG Jian |
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| Institution: | 91550 Troops,Dalian 116011 ,China;Department of Hydrography and Cartography,Dalian Naval Academy,Dalian 116018 ,China |
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| Abstract: | The multi-scale representation of spatial data is one of the most important and difficult problems in the field of GIS.This paper focuses on the multi-scale representation of Digital Depth Model (DDM,grid) and the geometric character of DDM,and constructs a multi-scale representation model of DDM based on the unfull quatree.The experiments show that this model can preserve the basic characters of the DDM with high computing efficiency. |
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