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| 导航数字地图的快速显示技术研究 | |
| 引用本文： | 高扬,杨志强,乌萌.导航数字地图的快速显示技术研究[J].测绘科学,2011,36(3):236-238,229. |
| 作者姓名： | 高扬 杨志强 乌萌 |
| 作者单位： | 1. 长安大学地测学院,西安,710054;西安测绘研究所,西安,710054 2. 长安大学地测学院,西安,710054 3. 西安测绘研究所,西安,710054 |
| 摘 要： | 针对车辆导航系统中地图显示问题,本文设计了"LOD层+多层四叉树+R树"三级索引结构,对现有的四叉树分块方式进行了改进,提出了基于多层四叉树空间分块和块内根据R树分包的数据组织方案,有效解决了覆盖多个网格的要素存放问题;提出了多层和多块的数据缓冲区结构,以及相应的数据后台预取和更新策略,提高了教据提取效率.试验结果表明... |
| 关 键 词： | 车辆导航系统 地图显示 数据组织 多层四叉树 R树 缓冲区 |
A quick display technique of navigation digital map |
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| GAO Yang,YANG Zhi-qiang,WU Meng.A quick display technique of navigation digital map[J].Science of Surveying and Mapping,2011,36(3):236-238,229. | |
| Authors: | GAO Yang YANG Zhi-qiang WU Meng |
| Institution: | ②(①College of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054,China;②Xi’an Surveying and Mapping Institute,Xi’an 710054,China) |
| Abstract: | To improve display performance of digital map in vehicle navigation system,this paper discussed organization and extraction techniques of map data.Firstly,a novel data organization method based onLOD level + hierarchical quad-tree + R-treeindex of three ranks was proposed,and it effectively solved the storage problem of map elements occupying multi-grid.Secondly,a data buffer structure with multi-level and multi-block and the corresponding strategy of data prefetching and update in background thread were in... |
| Keywords: | vehicle navigation system map display data organization hierarchical quad-tree R-tree data buffer |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |