Spatial presentation and Spatial presentation and analyses of police evidencesanalyses of police evidences

Tomislav IskraTomislav IskraMinistry of InteriorMinistry of Interior

General Police DirectoryGeneral Police DirectoryOperation and Communication centreOperation and Communication centre

Main topicsMain topics

GIS in policeGIS in police Police evidencesPolice evidences Transferring evidences in GISTransferring evidences in GIS Building GRID layersBuilding GRID layers Application for analyzingApplication for analyzing Live presentationLive presentation ConclusionConclusion DebateDebate

GIS in policeGIS in police

Using GIS in police besides Using GIS in police besides analyzinganalyzing• Address searchingAddress searching• Other location searchingOther location searching• Directing police patrolsDirecting police patrols• Gathering spatial Gathering spatial

informationinformation• Orientation in spaceOrientation in space• Making operation mapsMaking operation maps• Show emergency calls Show emergency calls

locationslocations• GPS location of vehiclesGPS location of vehicles

Police evidences suitable for Police evidences suitable for analyzing in GISanalyzing in GIS

traffic accidents and traffic offencestraffic accidents and traffic offences

violation of public orderviolation of public order

crime actscrime acts

other events (working accidents, fires, suicides,other events (working accidents, fires, suicides,…)…)

Maintaining police evidences and Maintaining police evidences and preparing them for GISpreparing them for GIS

A policeman takes notes A policeman takes notes about the eventabout the event

After return to the station the After return to the station the policeman or an policeman or an administrative worker enter administrative worker enter data of the event into the data of the event into the computer applicationcomputer application

All events are stored into a All events are stored into a databasesdatabases

Events have a spatial Events have a spatial parameter for which they are parameter for which they are suitable for presenting in GISsuitable for presenting in GIS

Preparation of evidences for Preparation of evidences for presenting and analyzing in GIS presenting and analyzing in GIS

A program on main computer A program on main computer adds X and Y coordinates adds X and Y coordinates referring to the spatial referring to the spatial geocoded databases (houses, geocoded databases (houses, roads, border)roads, border)

Evidences are converted into Evidences are converted into ASCII format and exportedASCII format and exported

With the program within GIS With the program within GIS data in ASCII format are data in ASCII format are converted into the converted into the geodatabases which are used geodatabases which are used for presenting and analyzing for presenting and analyzing in GISin GIS

Referencegeodatabases

Calculating density – Calculating density – building a GRID layerbuilding a GRID layer

3 2 5 14353

2 4 3 7

An aAn area is divided into rea is divided into 100 meters squares100 meters squares

For each square For each square number of events of number of events of certain type is certain type is countedcounted

The results of The results of counting are stored counting are stored into into a a geodatabase geodatabase

Geodatabase layers of density show us how events of Geodatabase layers of density show us how events of certain type are distributed across the areacertain type are distributed across the area

Application for analyzingApplication for analyzing

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

Live presentationLive presentation

Analysis of traffic accidents by cause, Analysis of traffic accidents by cause, consequences, time, weekday, …consequences, time, weekday, …

Presentation of violation of public order densityPresentation of violation of public order density

Analysis of violation of public order by time and Analysis of violation of public order by time and weekdayweekday

Analysis of crime acts by type and placeAnalysis of crime acts by type and place

ConclusionConclusion

Make analyzing easierMake analyzing easier

Presenting results on mapsPresenting results on maps

Can be used all policemen in policeCan be used all policemen in police

Standardize proceduresStandardize procedures

Results can be compared in space and timeResults can be compared in space and time

Thank you for attentionThank you for attention

Questions ?Questions ?