基于远程渲染的移动三维GIS构建方法  

A REMOTE RENDERING-BASED CONSTRUCTION METHOD FOR MOBILE 3D-GIS

作　　者：赖冬林 张丰[1,2] 杜震洪[1,2] 刘仁义[2] 

机构地区：[1]浙江大学浙江省资源与环境信息系统重点实验室,浙江杭州310028 [2]浙江大学地理信息科学研究所,浙江杭州310027

出　　处：《计算机应用与软件》2015年第7期196-199,共4页Computer Applications and Software

基　　金：国家自然科学基金项目(41001227;41101356);浙江省自然科学基金项目(401006);浙江省科技厅重点项目(2010C33146);中国国家博士后基金项目(20100481405)

摘　　要：随着移动互联网的发展,移动GIS应用逐渐从二维GIS发展为三维GIS。受制于3D场景数据量大、移动设备图形渲染能力低等因素,常用的移动三维GIS渲染效果较差,交互低效。结合预处理策略、客户端预载入策略与远程渲染技术提出一种高效的移动三维GIS构建方法。该方法利用QEM算法在服务器端预处理模型,减少移动端计算量,通过移动端预载入策略,减少帧之间的延迟,提高移动端的实时性,具有较好的渲染效果、高效的交互性和较低的耗电量。最后通过实验证明该方法的可用性。该方法适用于移动设备甚至可穿戴设备中GIS应用的构建。As the mobile Internet developing, mobile GIS application has been gradually developed from 2D-GIS to 3D-GIS. Common methods of mobile GIS have poor rendering effect and low efficient interactivity due to restrained by large data amount of 3D scene and low graphics rendering capability of mobile devices. By combining the strategies of preprocessing, pre-load for clients and remote rendering technology, this paper presents an efficient construction method for mobile 3D-GIS. It uses QEM （quadric error metrics） algorithm to pre- process model at the server end to reduce the computation load at the mobile end, and reduces the delay between the frames through pre-load strategy at mobile end and improves real-time property of the mobile end, it has better rendering effect, efficient interactivity and lower power consumption. Finally the applicability of the method is proved by the experiment. This method is adapted to the construction of GIS applications for mobile devises or even the wearable devices.

关 键 词：远程渲染 移动GIS 三维GIS 网格化简 

分 类 号：TP39[自动化与计算机技术—计算机应用技术] P208[自动化与计算机技术—计算机科学与技术]