Settlement and the creation of new cities is a way of dealing with urban problems, a solution to the urbanization crisis and getting rid of the urbanization problems of the present century. In our country, the transition from agricultural economy to industrial economy has led to the establishment of heavy and semi-heavy industries in large and first-class urban areas and the transformation of the socio-economic structure of these cities. Hence, the creation of new cities has been implemented as an attraction for part of the population and economic activities in reducing the environmental problems of the mother cities around them. Since the 1981s, the government has established new cities with the aim of preventing population overflow, reducing the economic burden of metropolitan areas, preventing the uncontrolled growth of large cities, reducing the cost of housing units, optimal population distribution, and so on.

728 / 5000 Translation results For example, the metropolis of Tehran, with its increasing growth, comprehensive and unplanned physical expansion, has brought instability to the surrounding environmental structure. One of the strategies considered in land management for decentralization and redistribution of population and facilities, development of cities and construction of new settlements around the mother cities, which should be considered environmental, socio-economic, physical, geographical distance, etc. in its studies to Do not lead to environmental problems.
The most important issue in organizing the land of unity is a national policy of population settlement at different levels of the city, village and nomadic community of the country. In fact, land management pays attention to population and space, space management includes the system of nodes, cities and settlements, in terms of function, the system of transport networks between city and village and land use by various activities.

The need for settlement and the creation of new cities in the urban planning model

The phenomenon of new cities in Iran in recent years has been mainly located and formed in order to attract population. In fact, in locating new cities, two parallel goals are pursued; First, decentralization of metropolises and second, centralism in backward and deprived areas but with development potential, which leads to the creation of new centers of development in urban areas of large cities or metropolises in the role of intermediary between cities smaller than one. On the other hand, while attracting the growing population of large cities, it also attracts the immigrant population to the metropolis and from small cities.
In fact, in locating new cities, two parallel goals are pursued; First) decentralization of metropolitan areas; Second, centralism in backward and deprived areas but with development capabilities. Among other factors in the formation of new towns and cities in Iran are the factors of economic development or the formation of industries in different regions. ., And with this performance, while being away from the negative effects of corporate settlements, they have had an important psychological and physical factor to encourage and attract expert forces.
The issue of natural disasters has always been and will be raised at the national level, and therefore a new city can, when necessary, as an option or temporary accommodation for a crisis-stricken city in a suitable new location.

Therefore, in order to create new towns and cities, we must ask the following questions:

• Which areas are suitable for the creation and development of new towns and cities?
• What are the most important local, regional and national location indicators affecting the creation of new cities?
• Is it possible to achieve integrated spatial strategies and management within the target area?