The Spatial-Functional Model of Hanoi

Abstract
The urban development processes are the intricate processes that have close-relationship with all aspects of social-economic such as land value, population density, socio-economic status, emigration. Hence, understanding of the developing cities and identification of urban management tasks are very important in urbanization process. Along the history of spatial planning, researching urban development processes have some achievements especially, analyzing the spatial-functional structure of land in developed and developing countries based on urban models. Moreover, urban model could show the trend of development of the city, the relationship among land value - population density - socio economic status in the city, the spatial distribution of key characteristic of the urban population such as poverty, employment, housing and environment. Twelve approaches of the shape of urban areas to ecology on the second or intermediate level - the metropolis were established by differential authors. The shape of urban areas divided into four categories: spatial (star, concentric zone, sector, and density gradient); natural (poly-nuclear and surface feature); social (process, sentiment, social area, and cluster analysis); economic (ecological distance and land economics). This research deals with some urban models and formulates the urban models on Hanoi- the capital of Vietnam.