摘要
在没有互联网的条件下,三维数字城市系统无法便捷地在本地运行,无法满足用户需要实时显示和交互的要求。文中对OSGEarth三维地球引擎技术、离线三维数据库技术和地理数据组织管理进行研究,采用LOD与分页、四叉树动态调度等技术对离线数据进行无缝集成,采用Qt平台,构建离线三维数字城市系统,实现在离线状态下大规模三维场景实时漫游、空间数据交互和系统的移植。通过实验证明了三维数据显示的完整性和空间信息访问的高效性,较好地解决了三维数字城市离线状态下,数据的组织、集成、优化和高效访问等问题,为离线三维GIS方面的研究提供了一种新的技术。
The 3D digital city system cannot run conveniently in the local under the condition of no internet,which cannot satisfy users′ requirements of real-time display and interaction. The OSGEarth 3D earth engine technology,offline 3D database technology,and geographic data organization and management are researched in this paper. The seamless integration is conducted for offline data by using LOD and paging,quad-tree dynamic scheduling and other technologies. The offline 3D digital city system is established by using the Qt platform,so as to realize real-time roaming of the large-scale 3D scene in offline state,spatial data interaction and system transplantation. The completeness of the 3D data display and high-efficiency of spatial information access are demonstrated by the experiment,which can solve the problems of data organization,integration,optimization, and high-efficient access for the 3D digital city system in offline state,and provide a new technology for the research of offline 3D GIS.
作者
王星捷
卫守林
WANG Xingjie;WEI Shoulin(The Engineering & Technical College of Chengdu University of Technology,Leshan 614007,China;School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650093,China)
出处
《现代电子技术》
北大核心
2019年第12期112-116,共5页
Modern Electronics Technique
基金
国家自然科学基金:CCD集群分布式采集控制虚拟化技术研究(11403009)~~
