Abstract:

Metropolitan area is urban system with high integration trend and close spatial relationship. Metropolitan growth is the coordinate evolution results of the spatial selforganization evolution and regional economic and social factors, its also embodies the law of spatial mapping in human society. Metropolitan spatial evolution by three major mechanisms: selforganization evolution, economic and social development level and regional and the former two coupled together. The existing research focused on the following aspects: the spatial selforganization evolution, spatial structure reasonable, spatial form. At the same time, some researchers focus on how to establish index system for evaluation coordination degree of ecological environment, spatial cooperation crossing regional and its methods. spatial evolution is a synergistic evolution effect with spatial selforganization and economic social development. It is difficult to metric spatial organization level, therefore, the evolution of metropolitan spatial organization and spatial structure evolution are realized by spatial interaction. Spatial interaction can reflect the function of central city field, overall scale of regional economic and social development, spatial organization strength and government role in them. Spatial interaction is realized through traffic network, traffic network construction needs for government guidance and meet the objective demand of spatial organization in China. So we select intensity space connection and reasonable degree of traffic construction to represent metropolitan spatial organization. The authors take Wuhan Metropolitan area as the object of research, doing research into its spatial organizational structure by comparing it with Yangtze River Delta Metropolitan area, Pearl River Delta Metropolitan area and BeijingTianjinHebei Metropolitan area, using spatial interaction intensity, regional traffic accessibility and road network as indexes. It shows that Wuhan Metropolitan area is still in the primary stage of its development, and is at a lower level in terms of its total amount and scale. However, the structural indicators of Wuhan Metropolitan area fare well, its spatial organizational structure develops well and its space is wellstructured. There is little difference with developed urban clusters (metropolitan area) in terms of road networks and traffic accessibility. Some of the indexes even outshine others. This shows that although Wuhan Metropolitan area is in the primary stage of its development, its overall structure and organizational structure evolves in a scientific and sound way