| 基于球面六边形网格系统的空间信息处理方法 |
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| 引用本文： | 张永生,贲进,童晓冲,戴晨光.基于球面六边形网格系统的空间信息处理方法[J].测绘学院学报,2006(2). |
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| 作者姓名： | 张永生 贲进 童晓冲 戴晨光 |
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| 作者单位： | 信息工程大学测绘学院 河南郑州450052 |
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| 基金项目： | 测绘遥感信息工程国家重点实验室资助项目(WKL(05)0301) |
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| 摘 要： | 利用球面离散网格系统管理全球海量空间信息是一种受到普遍关注的新途径。文中提出的方法首先采用施奈德等积多面体投影将平面多分辨率六边形网格映射到球面构成网格系统;然后通过边界点四元组将球面六边形网格之间的空间关系转化为球面三角四叉树处理,利用扩展的QTM编码方案在3轴离散网格坐标系下实现了经纬度和单元地址码之间的转换;最后提出了单元分析和检索算法。实验结果表明,这种数据处理方法直接对单元地址编码进行操作,具有较高的效率。
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| 关 键 词： | 地球空间信息 六边形 网格系统 编码 检索 |
Geospatial Information Processing Method Based on Spherical Hexagon Grid System |
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| ZHANG Yong-sheng,BEN Jin,TONG Xiao-chong,DAI Chen-guang.Geospatial Information Processing Method Based on Spherical Hexagon Grid System[J].Journal of Institute of Surveying and Mapping,2006(2). |
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| Authors: | ZHANG Yong-sheng BEN Jin TONG Xiao-chong DAI Chen-guang |
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| Abstract: | The spherical discrete grid system is a promising approach of global massive geospatial information management.In order to get hexagon equal-area grid system on a sphere,we found the corresponding relationships between unfolded icosahedron and sphere using Snyder equal-area projection.Through a special geometry which is called "quaternary vertexes",we translate the correspond relationship between hexagon cells at different levels into spherical triangular quadtree.Also,we present a translation method between cell address code and longitude/latitude coordination in the 3-axes coordinate system and introduce coding and searching algorithm based on it.Instead of double points,our approach deals directly with binary address code and the result of experiments shows its efficiency. |
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| Keywords: | geospatial hexagon grid system coding searching |
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