1. Spatial presentation and analyses of police evidences
Tomislav Iskra
Ministry of Interior
General Police Directory
Operation and Communication centre

2. Main topics GIS in police Police evidences
Transferring evidences in GIS
Building GRID layers
Application for analyzing
Live presentation
Conclusion
Debate

3. GIS in police Using GIS in police besides analyzing Address searching
Other location searching
Directing police patrols
Gathering spatial information
Orientation in space
Making operation maps
Show emergency calls locations
GPS location of vehicles

4. Police evidences suitable for analyzing in GIS
traffic accidents and traffic offences
violation of public order
crime acts
other events (working accidents, fires, suicides,…)

5. Maintaining police evidences and preparing them for GIS
A policeman takes notes about the event
After return to the station the policeman or an administrative worker enter data of the event into the computer application
All events are stored into a databases
Events have a spatial parameter for which they are suitable for presenting in GIS

6. Preparation of evidences for presenting and analyzing in GIS
A program on main computer adds X and Y coordinates referring to the spatial geocoded databases (houses, roads, border)
Evidences are converted into ASCII format and exported
With the program within GIS data in ASCII format are converted into the geodatabases which are used for presenting and analyzing in GIS
Reference
geodatabases

7. Calculating density – building a GRID layer
Geodatabase layers of density show us how events of certain type are distributed across the area
An area is divided into 100 meters squares
For each square number of events of certain type is counted
The results of counting are stored into a geodatabase 3 2 5 1 3 5 3 4 2 4 3 7

8. Application for analyzing
Easy to use application with fast results
Simple spatial object selection for analyzing
Standard types of analyses suitable for time and space compare
Adding new analyses without changing the program code

9. Live presentation
Analysis of traffic accidents by cause, consequences, time, weekday, …
Presentation of violation of public order density
Analysis of violation of public order by time and weekday
Analysis of crime acts by type and place

10. Conclusion Make analyzing easier Presenting results on maps
Can be used all policemen in police
Standardize procedures
Results can be compared in space and time

11. Thank you for attention
Questions ?