基于海量存储的三维地理信息系统应用与研究  

Application and Research of Three Geographic Information System Based on Mass Storage

作　　者：宋娟[1] 张宏[1] SONG Juan;ZHANG Hong(School of Computer Science and Technology, Harbin University of Science and Technology, Harbin 150080, China)

机构地区：[1]哈尔滨理工大学计算机科学与技术学院,黑龙江哈尔滨150080

出　　处：《计算机技术与发展》2018年第5期144-148,共5页Computer Technology and Development

基　　金：黑龙江省教育科学技术研究项目(12541177)

摘　　要：针对海量地形数据存储空间大的瓶颈,提出了基于视域改进的LRU算法。为了实时提供基础的地理信息以及现场分布情况,支持海量地形数据存取,算法利用基础数据的大数据量、多数据源、多分辨率等特点,采用分页数据库组织、四叉树结构的LOD瓦片组织算法,构建金字塔三维模型;同时,采用动态调度、多缓冲多线程并行处理的方法,实现了多重纹理快速映射地形,达到了海量地形数据快速存取的效果。算法中海量数据存储方便,数据检索查询快速,配置要求低。系统实时提供基础地理信息、现场分布情况,支持海量数据和复杂图形符号,在使用过程中,使用者可直观地观察地图信息,根据实时传递的场景地形地貌进行分析,速度快可靠性高,提高了使用者的工作效率。Aiming at the bottleneck of massive terrain data storage space, we propose a LRU algorithm based on improved horizon. In or- der to provide basic geographic information and field distribution in real time and support the accessing of massive terrain data,based on the basic data of large volume,multi-source and multi-resolution,the algorithm uses the LOD tile organization algorithm with the paging database organization and four-tree structure to construct the pyramid 3D model. At the same time, it utilizes the method of dynamic scheduling and multi-buffering multi-thread parallel processing to achieve a multi-texture rapid mapping terrain, which finishes the fast accessing of the massive terrain data. In the algorithm,the mass data storage is convenient,the data retrieval query is quick and the config- uration requirement is low. The system provides the real-time basic geographic information and field distribution and supports the massive data and complex graphical symbols. In the course, the user can visually observe the map information and analyze it according to realtime transmission of terrain topography, with fast speed and high reliability, rising the user＇s work efficiency.

关 键 词：多线程 缓冲区机制 海量地形数据 金字塔模型 纹理映射 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]