Where is the Most Criminal Area in Boston? (+ More): Data Downloaded on 16 Nov 2022 from: https://data.boston.gov/dataset/streetlight-locations https://data.boston.gov/dataset/crime-incident-reports-august-2015-to-date-source-new-system https://data.boston.gov/dataset/city-of-boston-managed-streets

1. Where is the Most Criminal
Area in Boston (+ More)
Naoya Morishita

2. Table of Contents
• Introduction
• Methods
• Result
• Conclusion

3. Table of Contents
• Introduction
• Methods
• Result
• Conclusion

4. • Purpose of this study
• Visualize the Safe Area in Boston
• Evaluate if a Theory is True in Boston
→ To Know where is Safe to Walk during Mainly Night Time

5. Chalfin, A., Hansen, B., Lerner, J., & Parker, L. (2022). Reducing crime
through environmental design: Evidence from a randomized experiment
of street lighting in New York City. Journal of Quantitative Criminology,
38(1), 127-157.
No. of Lights Increase
-> No. of Crime Decrease?

6. • Research Questions
1. Where is the Criminal Area?
2. Does the Lights Prevent Crimes in Boston?

7. Table of Contents
• Introduction
• Methods
• Result
• Conclusion

8. • Data
• STREETLIGHT LOCATIONS: Light Data
• https://data.boston.gov/dataset/streetlight-locations
• Downloaded: 21 Nov 2022
• CRIME INCIDENT REPORTS (AUGUST 2015 - TO DATE)
(SOURCE: NEW SYSTEM): Crime Data
• https://data.boston.gov/dataset/crime-incident-reports-august-2015-to-date-
source-new-system
• Downloaded: 21 Nov 2022
• Data in 2021 (Crime_2021) & 2018 (Crime_2018)
• CITY OF BOSTON MANAGED STREETS: Road Data
• https://data.boston.gov/dataset/city-of-boston-managed-streets
• Downloaded: 21 Nov 2022

9. Study Area

10. Road
Crime_2021
Road_Buffer
Crime_Count_
2021
Criminal Area in Boston
Count Points

11. Crime_2018
Light
Dist
Distance to
Nearest Point
Crime_2018
Light
50m_Grid
Crime_Light_
Number
Correlation
Coefficient
Count Points
Python
No. of Lights Increase
-> No. of Crime Decrease?

12. Table of Contents
• Introduction
• Methods
• Result
• Conclusion

13. Fig 1 Criminal Street

14. Fig 2 Distance from Nearest Lights from
Crime Points (Unit: meter)
Mean 9.5
Median 8.7
Minimum 1.1
Maximum 54.5
SD 5.0

15. Fig 3 Number of Crimes in 50m Grid (2018)

16. Fig 3 Number of Crimes in 50m Grid (2018)

17. Fig 5 Scatter plot of Number of Lights and
Crimes on a street

18. Fig 6 Code and Correlation Coefficient

19. Table of Contents
• Introduction
• Methods
• Result
• Conclusion

20. • Research Questions
1. Where is the Criminal Area?
2. Does the Lights Prevent Crimes in Boston?

21. • Criminal Area in 2021 was East of Boston Common
• Numbers of Crime and Lights/ Street has NO Correlation.

22. Reference
Chalfin, A., Hansen, B., Lerner, J., & Parker, L. (2022).
Reducing crime through environmental design: Evidence from
a randomized experiment of street lighting in New York City.
Journal of Quantitative Criminology, 38(1), 127-157.