WEB3D09

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https://diglib.eg.org/handle/10.2312/1032

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Browsing WEB3D09 by Subject "Client/server"

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    Enterprise-level architecture for interactive web-based 3D visualization of geo-referenced repositories
    (The Eurographics Association, 2009) Simoes, Bruno; Conti, Giuseppe; Piffer, Stefano; Amicis, Raffaele de; Dieter W. Fellner and Alexei Sourin and Johannes Behr and Krzysztof Walczak
    Interoperability, interactivity and 3D visualization are three of the most important challenges related to Geographical Information Systems. In the last few years, research on interoperability has evolved from simple exchange of spatial data files, through the establishment of standardized spatial data repositories, to the first initiatives allowing management of semantic aspects of data. Interoperability has been mainly hampered by the need to agree on standards, and to develop appropriate tools and methods. The Open Geospatial Consortium (OGC) has proposed a number of standards with the intention of promoting interoperability through the use of open services such asWeb Mapping Service (WMS),Web Processing Service (WPS),Web Feature Service (WFS) andWeb Coverage Service (WCS). However, there are a number of open issues regarding interactivity, 3D data visualization, fault tolerance, scalability, server-independent implementation, delayed-time transactions, to name but a few, that clearly reflect the need for further study and discussion. This paper presents a service-oriented architecture in the context of interoperable Web 3D GIS applications, designed to support features such as manipulation, processing and visual analysis of geographical information.
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    An Incremental SMLAOI Algorithm for Progressive Downloading Large Scale WebVR Scenes
    (The Eurographics Association, 2009) Wang, Wei; Jia, Jinyuan; Dieter W. Fellner and Alexei Sourin and Johannes Behr and Krzysztof Walczak
    Interactive downloading huge virtual scenes on Internet is always a challenging task of large scale DVE(Distributed Virtual Environment) systems. Along classical progressive transmission mechanism based on AOI (Area of Interest), this paper proposes a new concept SMLAOI (Scalable Multi-Layer AOI). Then,presents an integer incremental SMLAOI culling algorithm without multiplication, divisions and floating calculations, which allows the WebVR regions nearer to current viewpoint to download with higher delivery priority, and reduces time that a user need to wait for initial scenes. Finally a framework of progressive downloading large scale WebVR scenes based C/S is designed.