摘要
文中目的是设计一种基于四叉树索引的海量数据存储和传输方案,并将其应用在自主开发的数字地球系统中。使用四叉树索引完成海量影像与高程数据的存储方案设计,并在此基础上设计了一种基于海量数据的传输方案。该方案在数字地球系统的展示效果表明,这种基于四叉树索引技术的海量数据存储技术以及网络传输方案,能够满足影像、高程数据实时可视化的需要,并且利于确定视野可见范围内的地图块位置,利用截锥裁剪技术减少系统渲染的数据量,提高系统的执行效率。该方案在数字地球系统中发挥了重要作用,有一定的实用价值。
A method used in massive data storage and transmission is needed,which is based on quadtree,also digital earth developed independently takes advantage of the method timely.Mostly,designed the database for image and altitude datas,and proposed the network transport based on massive data.The experiment indicates that this method can meet the needs of real-time visualization,also,it brings advantage to ascertain the map areas in sight,which can greatly decrease the number of datas to rend,and improve the performance of the system.At last,the methods played an important role in digital earth system,and it is practical.
出处
《计算机技术与发展》
2012年第3期81-84,共4页
Computer Technology and Development
基金
国家自然科学基金资助项目(60303023)
关键词
数字地球
四叉树
海量数据
网络传输
digital earth
quadtree
massive data
network transport
