Construction violations are one of the anomalies of cities, especially in developing countries. In line with the increase in effective demand in the construction industry, cities have faced huge challenges. The aim of the current research is the spatial analysis of construction violations based on the Article 100 Municipal Commission in Bostan Abad city. The current research is applied in terms of purpose and descriptive-analytical in terms of nature. Construction violations registered in the Article 100 Commission of Bostan Abad Municipality during a 5-year period (1396-1400) were analyzed temporally and spatially using spatial analysis techniques in the ArcGIS software environment. Then, using the average nearest neighbor distance (ANN) model, the pattern of spatial distribution of construction violations in the city of Bostan Abad during the 5-year period of study was determined. Also, the Kernel Density Estimation (KDE) technique has been used to analyze high or low amounts of construction violations registered in the Article 100 Municipal Commission in Bostan Abad city. According to the results of the research, according to the frequency of construction violations registered in the Article 100 commission of Bostan Abad city during a period of 5 years (1396-1400), Farhangian, Waliasr, Molvi and Gurbanabad neighborhoods with 227, 190, 114 and 93 cases of construction violations registered in the Commission of Article 100 of Bostan Abad city, have allocated a major part of construction violations. The neighborhoods of Qarakore and Eskikandi have the lowest frequency of construction violations with 37 and 49 cases of construction violations recorded during the 5-year period under study. The pattern of spatial distribution of recorded building violations was also cluster type. It should be noted that most of the registered construction violations are related to construction violations without a construction permit and exceeding the construction permit, which have been registered in the form of residential and commercial uses.
Introduction
In the past decades, due to the increase in the population of cities, the spread of construction violations has faced the managers and residents of many cities in developing countries with major problems. which will be challenging if this uncontrolled and irregular urban expansion is not properly controlled and managed. The existence of factors such as the inefficiency of the urban management system, the long process of obtaining a building permit and the price of land, especially in third-world cities, are among the factors that have made citizens more justified in committing construction violations (Madanian, 35: 1387). Urban construction control requires planning and rational management and rewriting of the planning and management method by local governments (Zeyang Li et al, 2020.2). In the process of rewriting regulations, it is important to include the concerns of local residents and the entire process should be democratic. Finally, the new law should consider the traditional culture and current economic-social demands of the people (Rakwaro, 2009. 8). Therefore, policymakers can predict and control the trend between construction demand and the occurrence of construction violations and develop appropriate strategies to deal with the challenges ahead (Rayan Y.C. Fan, 2011. 167).

Methodology
The current research is applied in terms of purpose and descriptive-analytical in terms of nature and method. According to the nature of the study, the method of collecting information is in the form of documents and a library, which includes the information of the cases of construction violations registered in the Article 100 Commission of Bostan Abad Municipality. Therefore, the construction violations registered in the Article 100 Commission of Bostan Abad Municipality during a 5-year period (1396-1400) were analyzed temporally and spatially using spatial analysis techniques in the ArcGIS software environment. Then, using the average nearest neighbor distance (ANN) model, the pattern of spatial distribution of construction violations in the city of Bostan Abad during the 5-year period of study was determined. Also, the Kernel Density Estimation (KDE) technique has been used to analyze high or low amounts of construction violations registered in the Article 100 Municipal Commission in Bostan Abad city.
Conclusion
In the city of Bostan Abad, most of the construction violations took place, in addition to being caused by poverty and in the outskirts of the city, a significant number of violations occurred in places that are in better financial conditions than other places, and Most of these violations have been committed by people who seek to evade the law and seek economic profit. Therefore, the income of the owner or the economic base of the owner is one of the economic factors affecting the occurrence of construction violations in Bostan Abad city. If the problems and problems of today's cities are properly rooted, most of them are related to the social issues of the same society. In the study of social factors affecting the occurrence of construction violations in Bostan Abad city, the lack of awareness of the rules and regulations of construction among residents, ignoring the needs of citizens in matters related to construction, and the lack of coordination and cooperation of residents with the city management in construction have They are more effective. Due to the increase in the population of cities and the high demand for construction in urban areas, city managers, especially in the cities of developing countries, have faced fundamental problems, which have become the basis for uncontrolled and irregular urban expansion. In examining the physical factors affecting the occurrence of construction violations in the city of Bostan Abad, the process of converting gardens and agricultural lands in the heart and outskirts of the city to residential, commercial and similar uses, non-compliance with the rights of adjacent users, the limitations and possibilities of the spatial development of the city and the problems in the development Property documents by residents are more influential. In the field of laws and regulations affecting the occurrence of construction violations, from the point of view of urban planning experts in Bostan Abad city, the uniformity and generalization of construction rules and regulations in different cities, as well as the lack of flexibility of plans and programs and the lack of sufficient attention to the facilities and conditions for the realization of plans Among the main influencing factors in the occurrence of construction violations in the city of Bostan Abad. According to the topic of the article, which is the investigation of the main influencing factors in the occurrence of construction violations in Bostan Abad city. Suggestions are made to reduce the occurrence of construction violations in this city. In this regard, it is necessary to note that two levels of action are important in relation to construction violations, first, some measures should be aimed at eliminating the causes of construction violations. In the next step, the necessary measures should be taken after the violation to reduce its effects on the city by adopting appropriate solutions.