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In this paper, we proposed the key steps in the 3D modeling of digital city, and established 3D geographic information platform combine with the construction of urban emergency rescue, systemically expound the concrete measures and approaches of the 3D GIS development in the microscopic field, provide crucial technological channels to rapidly build large-region real scenes, and explore its specific...
This paper discusses the urban simulation technology and application, and study for key technology mainly in erecting models for huge city zone. According to the request of urban simulation, we explain the key technology, such as construction of the models, technological route and three-dimensional scene, etc. in detail. Finally, we provide the conclusion.
3D Models have become important form of geographic data beyond conventional 2D geospatial data. Buildings are important marks for human to identify their environments, because they are close with human life, particularly in the urban areas. Geographic information can be expressed in a more intuitive and effective manner with architectural models being modeled and visualized in a virtual 3D environment...
In the extension process of the Digital City, there are many geographic information application platforms using three-dimensional architectural models, but the aim is only to create three-dimensional view effects. The abundant data of models is not fully used. The purpose of this paper is to make a preliminary exploration on application models of the three-dimensional architectural model used in the...
Three-dimension digital map has become an important development direction of map with the fast development of the computer and spatial data acquisition technology, and it has brought a tremendous impact to our lives in the network environment. The paper described the development status and theoretical foundation of the three-dimension digital map, then introduced the construction principle of real...
This paper explores a method for creating large-scale urban 3D models from GIS spatial data. It is capable of automatic generation of realistic VR models based on existing GIS data. Parametric 3D models of houses are created from polygon data, fences from line data, and pedestrians and trees from point data. The method is applied to the project `Virtual Kyoto Time-Space' in which the whole city of...
To explain how to use VRML in virtual city construction, the authors review main characteristics of virtual city, assess a number of effective programming languages applied on the Web 3D, discuss the basic functions of VRML and the basic frame of virtual world based on VRML, give an application instance of virtual city scene and show a lot of experiences. In the case study, Cortona VRML Client plug-in...
This research effort focuses on the historically-difficult problem of creating large-scale (city size) scene models from sensor data, including rapid extraction and modeling of geometry models. The solution to this problem is sought in the development of a novel modeling system with a fully automatic technique for the extraction of polygonal 3D models from LiDAR (Light Detection And Ranging) data...
Transportation management and planning has played an important role in urban planning. The paper discusses the success of using virtual reality (VR) technique in traffic simulation to communicate design alternatives to decision makers and public audiences and thus to support the decision making process. The study documents the application of VISSIM, a microscopic simulation model, VR4MAX, an interactive...
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