Dimensional Urban Landscape Spatial Information Interact Query

Spatial information's query base on 3D city scene not only provide vision taste for user, make user have perceptual cognition for city construction, but also make decision-maker, designer and user have more lifelike, impersonal cognition for status in quo of city layout and blueprint of design. So it is significance for the research of city continuable development because 3D city scene widen the view of city planner, designer and manager, make city planning, base establishment design is morereasonable. In this paper, the main works are as follows:a) Systematically discussed several techniques and theories of 3D modeling and construct partial 3D virtual scene based on spatial and attribute data;b) Analyze constitution of foundation geographic information database of city and design database of virtual city scene based on OpenFlight;c) Research the projection transformation from 3D scene to two-dimensional surface and the database operation, the spatial and attribute information's interactivequery of object is realized real-time roaming in city 3D scene;d) Realizing the two-dimensional map synchronal navigation function in VC;e) Spatial information's query system on virtual 3D city that has powerfulfunction, stable performance and preliminary applied ability is achieved.