Background and Aim: More than half of the world lives in urban areas. In many developing countries, many people migrate to urban centers every day, and the rate of urbanization is increasing in both developed and developing countries. But the urban population imposes huge challenges on natural resources and causes social and environmental problems in urban areas. Therefore, increasing the rate of urbanization is associated with many challenges. In Iran, the rate of urbanization has almost doubled over the past 30 years. Unstable urban income, urban poverty, marginalization and inappropriate urban housing are considered as major challenges of urban development in Iran. Determining urban boundaries is one of the solutions used in policies known as curbing the growth of cities or managing urban growth.
Methods: The current review research was conducted with the aim of investigating the importance of urban boundaries in controlling and guiding urban development and the role of urban boundaries in controlling and guiding the development of Arak city. The city of Arak is the capital of the central province, which is surrounded by mountains on three sides and desert on the other side, and is not capable of development in many ways. Therefore, the population density has increased in the central and inner parts of the city. The value of land development index for Arak city is high and the level of morphological adaptation is lower. Findings and Conclusion: The findings show that if special construction criteria are applied to very large areas, a large population can be accommodated in the worn-out fabric. Such a process also causes the development of the city in a systematic pattern. It is necessary that the municipality does not ignore the creation of public spaces and uses, and by creating public spaces in the neighborhoods, it creates participation among the residents. Reforms such as the demolition of old buildings and the establishment of high-rise structures require careful monitoring so that the tissue density does not exceed the permissible limit.