1. Arlington Police Department Crime Management Ron Andrews Blake Robinson Advisors: Bill Edmonds, Jim Mallard & Chief Bowman 1

2. Perplexing the mind? Where would crime incidences only occur during the day (up till 10:00pm) ? and At a rate of four times the surrounding areas? and Mostly affect motor vehicles? – Hint: Data Analysis Intuition & cell 206 2

3. Agenda Executive Summary – Nature of Project APD Overview – Primary Goals Current Operations Geographical Information System Cell & Grid Development Statistical & Data Analysis – Incident Concentration Model Development – Assignment Network (Pure Network) Recommendations & Results 3

4. Executive Summary Management of Crime Goal: Reduction of Crime Incidents by 25% over the next 3 years Insight into class one crimes (burglary, theft, murder, homicides and rape) and raw data 4

5. APD Overview Crime Triangle Over 300,000 incidents per year – Approx: 40,000 crime related (≈13%) 5

6. Current Operations 4 Police Districts – North, South, East, West – Police Station How police incidences are recorded Incidences are assigned priorities Insight into crime by location limited 6

7. Geographical Information System G.I.S is a system that captures, stores, analyzes, manages and presents data with reference to geographic location Provides detailed information which is mapable How do you effective redraw each district boundary line to effectively serve each area? 7

8. Grid & Cell Development Total Cells: 472 ½ Mile cell structure 1000 feet cell Structure Euclidean distance at centroid 8

9. ArcGIS 9

10. Current Boundary 10

11. Statistical & Data Analysis Bar Chart Scatter Chart Arlington total cell statistics Outlier Cell 206 Incident Concentration 11

12. 12

13. 13

14. Combined Cells 1-472 14

15. Cell 206 15

16. Incident Concentration Cells: 181, 180, 179, 207, 206, 205, 234, 233, 232, 263, 262, & 261 16

17. Incident Concentration Cells: 181, 180, 179, 207, 206, 205, 234, 233, 232, 263, 262, & 261 17

18. Model Development District Boundaries Constraints (can be ambiguous) – Distance – Time – Volume – Political – Operational 18

19. Model Development Cont. Assignment Network (Pure Network) 1888 Variables 476 Constraints 1 Objective Function 19

20. Model File 20

21. Data File 21

22. Output File 22

23. District Boundary Changes 23

24. *New Boundaries not placed accordingly to scale* New Boundary 24

25. Recommendations & Results Plans to help reduce crime incidents in target location: – Immediate Impact Police towers Higher Police presence Reminding safety cards on vehicle windshields – Long Term Centralized and monitored entrance to mall Parking Garage vs Parking Lot 25

26. Recommendations & Results Cont. Plans for utilization of assignment network model: – Minor changes in district boundaries 26

27. Questions 27