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ThinkMind // GEOProcessing 2011, The Third International Conference on Advanced Geographic Information Systems, Applications, and Services // View article geoprocessing_2011_2_40_30096


Determining the Geographical Origin of a Serial Offender Considering the Temporal Uncertainty of the Recorded Crime Data

Authors:
Marie Trotta
Benoit Bidaine
Jean-Paul Donnay

Keywords: crime mapping; geographic profiling; temporal data quality; least-squares adjustment; raster diffusion process; error propagation

Abstract:
Since the days the investigating officers used ”pin maps” to locate and to think about crime events, crime mapping has become widespread thanks to spatial analysis mainly supplied by GIS-like software. In particular these methods suit well to geographic profiling devoted to crime series characterised by a single offender and hence limited space and time variability. Although spatial techniques are now regularly performed to delineate an offender’s area of residence, the temporal dimension is underemployed due to the wider uncertainty of time records. This paper proposes a methodology based on a least-squares adjustment in order to cope with this temporal issue for determining the most probable offender’s residence. Moreover, a chi-square test is described to check the significance of the solutions suggested by the method. The process is carried out on the real road network which has been discretised (rasterised) for computing convenience. Three simulations show the validity of the reasoning. Finally the main time and speed assumptions introduced in the model are discussed paving the way for further research.

Pages: 40 to 45

Copyright: Copyright (c) IARIA, 2011

Publication date: February 23, 2011

Published in: conference

ISSN: 2308-393X

ISBN: 978-1-61208-118-2

Location: Gosier, Guadeloupe, France

Dates: from February 23, 2011 to February 28, 2011

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