| 一种通用球面等积离散网格生成算法 |
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| 引用本文： | 贲进,童晓冲,张衡,李勇.一种通用球面等积离散网格生成算法[J].测绘学院学报,2005,22(4):252-255,258. |
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| 作者姓名： | 贲进 童晓冲 张衡 李勇 |
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| 作者单位： | [1]信息工程大学,测绘学院,河南郑州450052 [2]通信指挥学院,湖北武汉430010 |
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| 基金项目： | 信息工程大学测绘学院课题（Y0503） |
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| 摘 要： | 球面离散网格模型是管理海量数据的有效途径,如何构建球面网格是这类模型的基础问题.文中利用Snyder等积多面体投影建立了平面与球面的对应关系,设计了球面等积三角形和四边形离散网格的生成算法.结合实验分析了两种网格的最大/最小边长比和单元周长均方差两项指标,结果表明全部网格的指标均收敛,适合用作多分辨率地理空间信息的管理.
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| 关 键 词： | 球面 等积 离散网格 算法 变形 |
| 文章编号： | 1009-427X（2005）04-0252-04 |
| 收稿时间： | 2005-06-14 |
| 修稿时间： | 2005-06-142005-09-15 |
A Universal Generation Algorithm of Spherical Equal-Area Discrete Grid |
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| BEN Jin, TONG Xiao-chong, ZHANG Heng , LI Yong.A Universal Generation Algorithm of Spherical Equal-Area Discrete Grid[J].Journal of Institute of Surveying and Mapping,2005,22(4):252-255,258. |
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| Authors: | BEN Jin TONG Xiao-chong ZHANG Heng LI Yong |
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| Institution: | 1. Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052, China; 2 .Commanding Communications Academy, Wuhan 430010, China |
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| Abstract: | Spherical discrete grid data model is the essential way of massive data management and how to generate grid is a foundamental problem. In order to generate spherical equal-area grid, this paper finds the corresponding relationships between unfolded icosahedron and sphere using Snyder equal-area projection. And then it presents a universal algorithm that will generate two kinds of grids. At last, this paper analyzes two targets, including ratio of maximum cell edge to minimum edge and the mean squared deviation of cell perimeter with experiment. The result indicates that both targets of all grids are all convergence and fit for multi-resolution geographic information management. |
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| Keywords: | spherical equal-area discrete grid algorithm deformation |
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