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Spatial presentation and analyses of police evidences

Spatial presentation and analyses of police evidences. Tomislav Iskra Ministry of Interior General Police Directory Operation and Communication centre. Main topics. GIS in police Police evidences Transferring evidences in GIS Building GRID layers Application for analyzing

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Spatial presentation and analyses of police evidences

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  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 1 2 5 5 3 4 3 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 ?

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