3D Digital City Representation Methods Based On Structural Analysis And Topological Constraints

The globalization of the cities and the information technology are the general trend of the future economic development, the realization of the urban information is necessary for the integration into city globalization. This article analyzed the structure of the city, the city mainly consists of road retwork and constructions, this article divided the city into two major categories, neighborhoods and roads. Different cities have different types of road network, for different types of road networks, they were used adjacency matrix, network matrix and adjacency list to represented, according to the complexity of the algorithm computer representation, the conclusion is the adjacency list is the best way. Urban road network uses a two-dimensional representation of the structure, but a building is a three-dimensional object, the structure is three-dimensional data structure, in order to achieve the combined representment of two-dimensional urban road network and three-dimensional architecture, this article proposed similar-wing edge structure based on3D data structure wings edge structure, the urban road network and buildings are seem as a whole, using similar-wing edge structure, achieve the combined representment of the road network and the buildings. Finally, select two residential and commercial areas in Fuzhou, using the similar-wing edge structure to combined represent the building and roads of the residential areas and commercial areas.