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《Journal of Yangtze River Scientific Research Institute》 2008-04
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Fast Modeling and Roaming of large Terrain

CAO Jing1,SHAO Yuan-zheng1,ZHANG Yu2,YE Song2(1.State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,WuhanUniversity,Wuhan 430079,China;2.Yangtze River Scientific Research Institute,Wuhan 430010,China)  
A three dimensional modeling of largescale terrain and city includes not only the surface elevation grid construction but also the modeling of the various features in the scene,such as rivers,buildings,lakes,forests and so on.Henceforth,the data required are usually large,and are referred to a lot of sorts and forms.In the traditional approach to realize the whole scope of the 3D terrain virtual walkthrough,modeling is a larger workload and the fast modeling is not easy to be achieved.In this paper,the powerful speciality of Terra Vista about terrain modeling and the unique character of OSG(open scene graph) on the field of 3D rendering are proposed.According to a city's large-scale terrain 3D walkthrough system,the paper presents how to convert the different data sources to the supportive formats in Terra Vista to achieve the fast modeling,then to implement the fluent virtual walkthrough of the whole scene using the excellent 3D rendering ability of OSG.
【Fund】: 湖北省科技创新与产业化支助项目(20051206002)
【CateGory Index】: P231.5
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