期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2009
卷号：XXXVIII-3/W4
页码：109-114
出版社：Copernicus Publications
摘要：Traditional navigation visualization utilizes two-dimensional digital maps for road guidance, and with the advances in visualization technique, algorithms, and computer hardware, it offer an opportunity of applications for mobile users in 3D virtual environment. The main challenge comes from how to efficiently provide up-to-data location-specific data and navigation services. For the real 3D world usually contains a lot of details and represents a huge amount of datasets, so it is a difficult to visualize the complex virtual 3D scenes and navigate in them on mobile devices. To solve the problem, this paper proposed a novel approach that is based on geographic web services and the servers dynamically generate the 3D scenes in terms of the navigation commands and then send the resulting as video-encoded image stream to the mobile client. In order to enhance the efficiency of 3D scenes rendering, those virtual 3D models' datasets were prepared and organized in an offline process. The approach allows us to provide interactivity for complex virtual 3D scenes on resource and bandwidth limited mobile devices
关键词：Navigation assistant; Mobile devices; Pyramid model; Quad-tree structure; Multi-resolution
