摘要
三维模型数据具有多源、异构、海量等特性,复杂三维地理场景的可视化通常需要应用专用软件和大量的计算资源,限制了模型数据的协同应用。本文针对以上问题,借助Web绘图标准WebGL,研究了一种轻量级的三维地理场景构建方法,通过将多源异构三维模型数据进行同构化处理,转换为统一的GL传输格式,实现在浏览器端灵活地整合在线三维模型数据服务以及用户的离线模型数据,充分利用客户端的计算资源,交互式地进行场景构建,实现三维地理场景的网络发布与共享。在此基础上研发了原型系统,以倾斜摄影三维模型、三维小品模型等为数据基础,实现了浏览器端的三维场景整合与发布,验证了该构建方法的可行性。
3 D model data has many characteristics, such as multi - source, heterogeneous, mass and so on. The visualization of geo- graphical scenes requires dedicated software and lots of computing resources, which limits the collaborative application of model data. To solve the above problems, Research on a lightweight construction method of 3D geographic scene with the help of Web drawing standard- WebGL, By the isomorphism, multi- source and heterogeneous 3D model data are converted to GL unified transmission format, integrate online 3D model data services and user＇s offline model data in the browser flexibly and make full use of the compu- ting resources of client. From this we can construct the scene interactively, publish and share the 3D geographic scene through net- work. On this basis, a prototype system is developed. Based on the oblique airborne photogrammetric -based 3D model and 3D sketch model, the 3D scene integration and publishing of browser end is realized, and the feasibility of this method is verified.
出处
《测绘与空间地理信息》
2018年第2期62-64,67,共4页
Geomatics & Spatial Information Technology
基金
国家重点研发计划:一体化综合减灾智能服务系统项目(2016YFC0803108)资助
