海量三维城市景观互联网络发布技术  

An internet release technique for mass virtual scene of urban 3D landscape

作　　者：裴继红[1] 钱姚锋[1] 

机构地区：[1]深圳大学智能信息研究所,深圳518060

出　　处：《深圳大学学报（理工版）》2007年第4期379-383,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：国家高技术研究发展计划资助项目(2001AA130038);深圳市科技计划资助项目(200338)

摘　　要：设计并实现一种海量三维城市景观的互联网络发布引擎.提出一种地形与地物相结合的多源数据集成模型,使地形块成为数据调度的最小单位,统一了地形与建筑物的网络发布;设计基于固定地形块数量的客户端数据调度算法和服务器端缓冲区设置算法,解决客户端和服务器端内存受限的问题;结合多分辨思想,采用ActiveX、OpenGL和多线程技术实现浏览器/服务器模式三维城市景观互联网络发布引擎.该技术对数字城市推广应用有重要价值.An internet release engine for mass virtual scene of 3D urban landscape was designed and implemented. In the engine, multi-resolution DOM, DEM and building model data were integrated as a type of block-based multisource data model （BMSDM） , and a BMSDM block was used as a minimum data cell for internet releasing. An efficient data exchange algorithm between browser and server was also introduced, The algorithm solved the problom caused by the limitation of data buffer size and bandwidth. Testing result show that our engine can efficiently transfer mass 3D GIS data on internet, with prompt responses to the internet users. This project is significant for applications of digital city technology.

关 键 词：三维城市景观 多分辨率 数字城市 三维引擎 海量数据 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TP391[自动化与计算机技术—计算机科学与技术]