Various crimes have been steadily increasing and many people feel uneasy about public safety. Especially, the number of snatch occurrence in Osaka has been the top in Japan for the last 31 years, and it is serious problem. This study aims to research relationship between visibility and occurrence of snatch by quantifying the visibility.
At first, from relationship among occurrence of snatch, population data, land-use data, and illuminance data, 24 wards in Osaka city were classified into 4 groups. In Sumiyoshi ward, belonging residential area group, relationship of occurrence of snatch was studied. From the study, the rate of occurrence of snatch is relatively lower in the area where distance of visible road is from 50m to 100m comparing the area where the distance is longer or shorter in both.
