geographical investigating of crime in central business district (cbd)

abstract tehran, the largest metropolis of iran, due to specific physical, demographical, social, economical and cultural situations generates larger crime rate than other cities of iran. in central business district of tehran, which sits in the area no.12, and no.11 of tehran municipality, crime occurs more than other part of the city. this paper aimed at identifying the spatial distribution of drug related crimes in the central business district of tehran city and investigating of spatial and physical crime facilitators in this part of the city. this article based on descriptive and analytic methods and the spatial patterns of crime in this part of the city have been identified through some statistical methods including: mean center, standard deviation ellipse, test for clustering, interpolation method and quartic kernel density estimation using geographical information systems. the study population as all the numbers (without the use of sampling techniques) from the police and criminal cases related to administrative units of the greater tehran police commander on 1/1/87 till 30/11/87 has been extracted. thus the present study collection of crime statistics community committed drug trafficking and abuse that in studied period (april to march 87) within the central business district of tehran have occurred. the results of this study show that spatial distributions of drug-related crimes in cbd of tehran city are significantly clustered which indicate the relationships between drug dealing and abusing places and the structural and physical characters of this part of the city. moreover, the spatial pattern of crime in cbd of tehran affected by the location of subway and rail stations in this part of the city. in addition, different social and economical characters of the residents of the cbd of tehran city have influenced the patterns of drug abuse in this part of the city. so organizing and physical enabling along with taking preventive approaches through social and cultural programming is essential to reduce crime in this part of the city.