References of "Donnay, Jean-Paul"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailImpact de l’anisotropie du milieu dans les études de profilage géographique
Trotta, Marie ULg; Deprez, Cécile; Donnay, Jean-Paul ULg

in SAGEO 2014, Grenoble 24-27 November 2014 (in press)

This communication aims at assessing the bias introduced by the use of the Euclidean distance in the context of geographic profiling analyzes. It proceeds by a comparison of road and Euclidean distances ... [more ▼]

This communication aims at assessing the bias introduced by the use of the Euclidean distance in the context of geographic profiling analyzes. It proceeds by a comparison of road and Euclidean distances of about 1 000 pairs of origin-destination (crime sites – criminal’s anchor point) from the database of the Belgian Federal Police. Comparisons are differentiated by the density of road network (rural and urban areas) and the statistical parameters of the resulting distributions are exploited in the application of the most common geographic profiling model called the distance decay model. [less ▲]

Detailed reference viewed: 17 (11 ULg)
Full Text
Peer Reviewed
See detailSciences de l'information géographique, Méthodes et techniques
Donnay, Jean-Paul ULg; Billen, Roland ULg

in Revue Internationale de Géomatique = International Journal of Geomatics and Spatial Analysis (2014), 24(2/2014), 268

Detailed reference viewed: 29 (1 ULg)
Full Text
See detailL’évolution de la cartographie thématique sur micro-ordinateur
Donnay, Jean-Paul ULg

in Wellar, Barry (Ed.) AutoCarto Six Retrospective (2013)

In 1983, personal computers emerge, and the few mapping softwares are reserved to "big" computers. The communication made ​​at AutoCarto Six sustains the hypothesis that micro-computing environment can ... [more ▼]

In 1983, personal computers emerge, and the few mapping softwares are reserved to "big" computers. The communication made ​​at AutoCarto Six sustains the hypothesis that micro-computing environment can support thematic mapping. The last decades have clearly confirmed this hypothesis. But first, it's more the portable and open software structure which proved its originality rather than the reliance on a particular hardware - now obsolete - and secondly, the role of thematic mapping today resorts to another kind of software - such as GIS - devoted to the processing of geographic information. [less ▲]

Detailed reference viewed: 44 (5 ULg)
Full Text
See detailGuide de rédaction des cartes thématiques. Méthodes et consignes
Donnay, Jean-Paul ULg

Book published by Université de Liège (2013)

Contents: Basic concepts - Geo-referencing - Cartographic Generalization - Discretization of a quantitative variable - Use of solid color - Use the B / W - Use of symbols - Base map - Map lettering ... [more ▼]

Contents: Basic concepts - Geo-referencing - Cartographic Generalization - Discretization of a quantitative variable - Use of solid color - Use the B / W - Use of symbols - Base map - Map lettering - Mapping layout . [less ▲]

Detailed reference viewed: 153 (27 ULg)
Full Text
See detailMéthodologie de recherche en cartographie criminelle
Donnay, Jean-Paul ULg; Trotta, Marie ULg; Kasprzyk, Jean-Paul ULg

Scientific conference (2013, April 26)

Presentation of the original research methods conducted by the Geomatics unit of the University of Liege, on environmental criminology, geographic profiling, and business intelligence in crime mapping.

Detailed reference viewed: 89 (19 ULg)
Full Text
Peer Reviewed
See detailOperationality of geographic profiling through a hypothetico-deductive method. A review of constraints and factors.
Trotta, Marie ULg; Lemaître, André ULg; Donnay, Jean-Paul ULg

in Bulletin de la Société Géographique de Liège (2013), 60

This paper is dedicated to the identification of the constraints and factors enabling the computation of an effective geographic profile, with the specificity of focusing only on the elements that could ... [more ▼]

This paper is dedicated to the identification of the constraints and factors enabling the computation of an effective geographic profile, with the specificity of focusing only on the elements that could be available during an investigation. It aimed at filling the gap between the inductive demarche of environmental criminology and the deductive, operational procedure followed by geographic profilers. It reviews successively the relationship between the premeditation, the seriousness of the facts, the nature of the offences and the spatio-temporal pattern of the crimes with the criteria required to build effective likelihood surfaces in geographic profiling. A decision tree is provided as a tool for evaluating the risks of an ineffective geographic profile with regard to the non-respect of the different conditions. [less ▲]

Detailed reference viewed: 98 (50 ULg)
Peer Reviewed
See detailReconstitution of the Journeys to Crime and Location of Their Origin in the Context of a Crime Series. A Raster Solution for a Real Case Study
Kasprzyk, Jean-Paul ULg; Trotta, Marie ULg; Donnay, Jean-Paul ULg et al

in Leitner, Michael (Ed.) Crime Modeling and Mapping Using Geospatial Technologies (2012)

In the region of Charleroi (Belgium), a series of criminal acts were committed by the same group, using the same vehicle. The events were located in space and time. The car used during these criminal ... [more ▼]

In the region of Charleroi (Belgium), a series of criminal acts were committed by the same group, using the same vehicle. The events were located in space and time. The car used during these criminal activities was stolen (first event) and was later retrieved (last event) after a period of 4 days of offences. Police recorded a crucial clue: the total mileage covered by the vehicle between the first and the last event was estimated with an admissible approximation. Thanks to this information, we were able to choose the most probable journey-to-crime among several scenarios. These depended on the combination of cost surfaces built with distance propagation algorithms starting from each criminal event in raster mode. The distance propagations were limited to the road network and the combinations of the cost surfaces had to respect the chronology of the facts. The most plausible scenario suggested that the criminals hided the car into a withdrawal site between their activities. In order to improve the precision of the location of this withdrawal site, we used a multi-criteria analysis taking account of the journey of the vehicle and other environment variables. At the end of these treatments, the small stretch of road that we isolated actually included the withdrawal site, as confirmed by the police later [less ▲]

Detailed reference viewed: 123 (34 ULg)
Full Text
See detailActes de la Conférence internationale de Géomatique et Analyse Spatiale 2012
Billen, Roland ULg; Binard, Marc ULg; Hallot, Pierre ULg et al

Book published by Unité de Géomatique (2012)

Detailed reference viewed: 109 (19 ULg)
Full Text
Peer Reviewed
See detailAnalyse préalable à une infrastructure de données au Maroc
Ibannain, Fatiha; Donnay, Jean-Paul ULg

in Billen, Roland; Binard, Marc; Hallot, Pierre (Eds.) et al Actes de la conférence internationale de Géomatique et Analyse Spatiale 2012 (2012, October)

In this paper, we discuss ways of promoting a spatial data infrastructure (SDI). Further considerations regulating the organizational infrastructure, the development of tools and models taking into ... [more ▼]

In this paper, we discuss ways of promoting a spatial data infrastructure (SDI). Further considerations regulating the organizational infrastructure, the development of tools and models taking into account the diversity of actors is inevitable to achieve the objectives of an SDI. Our study focused on the technical prerequisites for the establishment of an SDI in Morocco. An ontological approach to the reference spatial data has facilitated the definition of object types when cataloging reference entities, as well the concepts used in conceptual modeling. A feature catalog complying with ISO 19110 is developed using the principles of this ontology illustrating the independence and complementarity of object types, their adaptability to specific application domains and their inheritance. This approach allows establishing a reference model, that is to say a base structure which can be adapted to a wide range of applications. Developments of this work aim to sensitize policy makers about the introduction of an SDI in Morocco. [less ▲]

Detailed reference viewed: 81 (4 ULg)
Full Text
See detailGeodetic and cartographical standards applied in Belgium
Donnay, Jean-Paul ULg; Lambot, Philippe

in Van Hecke, Etienne (Ed.) A Concise Geography of Belgium (2012)

Definition of datum BD72 and GRS 80, and cartographic systems Belgian Lambert 1972 & Belgian Lambert 2008, now in use in Belgium

Detailed reference viewed: 40 (3 ULg)
Full Text
See detailSystèmes géodésiques et projections "Lambert belge"
Donnay, Jean-Paul ULg

Learning material (2012)

Cartographic and geodetic coordinate systems. Local and spatial datums. Successive versions of the Lambert conic conform (LCC) projection used in Belgium

Detailed reference viewed: 109 (4 ULg)
Full Text
Peer Reviewed
See detailDetermining the Geographical Origin of a Serial Offender Considering the Temporal Uncertainty of the Recorded Crime Data
Trotta, Marie ULg; Bidaine, Benoît ULg; Donnay, Jean-Paul ULg

in GEOProcessing 2011 : The Third International Conference on Advanced Geographic Information Systems, Applications, and Services (2011, February)

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 ... [more ▼]

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. [less ▲]

Detailed reference viewed: 293 (74 ULg)
Full Text
Peer Reviewed
See detailReconstitution of the journeys to crime and location of their origin in the context of a crime series. A solution for a real case study.
Trotta, Marie ULg; Kasprzyk, Jean-Paul ULg; Donnay, Jean-Paul ULg

Conference (2010, April 15)

Dynamic studies in crime analysis usually use distance-decay models applied on isotropic surfaces. If the distance actually traveled within the context of a crime series can be estimated, another approach ... [more ▼]

Dynamic studies in crime analysis usually use distance-decay models applied on isotropic surfaces. If the distance actually traveled within the context of a crime series can be estimated, another approach, independent of the widely discussed form of the distance decay, can be suggested. Besides, there is a need for studies on anisotropic space, especially in European cities, given their complex road network. Therefore, this study takes this aspect into account. We use data of a real case provided by the Belgian Police Department. Five criminal events have been committed in a short period of time by individuals using the same stolen car before abandoning it. The milometer allowed the Police to estimate the mileage covered by the criminals. The purpose of the analysis is to map out all the possible journeys to crime in order to find the offender's hideout. First, we generate cost surfaces propagated from the locations of the criminal events over the dense road network in a high-resolution raster file. This provides a distance value for all pixels of the potential paths to each crime. Then these distances are cumulated for all criminal events and the sum is confronted to the recorded mileage. This gives a restricted list of road sections from which all event locations can be reached under the constraint of the mileage covered. These results are then refined through a multi-criteria analysis using exogenous data, such as land covers. The small area finally identified contains indeed the hideout as confirmed by the Police Department. [less ▲]

Detailed reference viewed: 65 (17 ULg)
Full Text
See detailPresentation of the Unit of Geomatics of the University of Liege
Donnay, Jean-Paul ULg

Scientific conference (2009, October 06)

Presentation of the researches carried out in the service of the Geomatics Unit, University of Liège: Geodesy and GNSS, Remote Sensing and Photogrammetry, Geographic Information Science, Cartography ... [more ▼]

Presentation of the researches carried out in the service of the Geomatics Unit, University of Liège: Geodesy and GNSS, Remote Sensing and Photogrammetry, Geographic Information Science, Cartography, Spatial Analysis [less ▲]

Detailed reference viewed: 20 (2 ULg)
Full Text
Peer Reviewed
See detailUne Grande Dame de la géographie au service de la recherche, de l'enseignement et du bien commun
Devillet, Guénaël ULg; Donnay, Jean-Paul ULg; Halleux, Jean-Marie ULg et al

in Bulletin de la Société Géographique de Liège (2009), 52

Detailed reference viewed: 117 (20 ULg)
Full Text
See detailSir Stirling Moss
Donnay, Jean-Paul ULg

Article for general public (2009)

Detailed reference viewed: 33 (8 ULg)
Full Text
See detailAnamorphose par ajustement d'un réseau de triangles irréguliers (T.I.N.)
Donnay, Jean-Paul ULg; Chaidron, Christophe

in Joost, S.; Pointet, A.; Caloz, R. (Eds.) et al De la physique expérimentale aux sciences et systèmes de l'information géographique (2009)

Detailed reference viewed: 101 (17 ULg)
See detailAtlas van België: Leeswijzer
Binard, Marc ULg; De Maeyer, Philippe; De Temmerman, Leen et al

Book published by Academia Press (2008)

Toute personne qui se déplace dans un environnement complexe souhaite pouvoir s'orienter et tente pour ainsi dire de «cartographier» l'espace dans lequel il évolue. Tant les personnes que les institutions ... [more ▼]

Toute personne qui se déplace dans un environnement complexe souhaite pouvoir s'orienter et tente pour ainsi dire de «cartographier» l'espace dans lequel il évolue. Tant les personnes que les institutions ont besoin d'une représentation compréhensible des environnements spatiaux dans lesquels elles vivent et se déplacent. Un troisième Atlas de Belgique est édité afin de répondre à cette nécessité, avec pour objectif d'ordonner l'abondance de données disponibles, principalement en les visualisant dans l'espace. L'actuelle société belge, avec sa complexité, ses fortes différenciations sociales et spatiales, ses anciennes oppositions et ses nouveaux fossés, est ainsi cartographiée. Le troisième 'Atlas de Belgique' tente de présenter les données d'un maximum de sources en faisant ressortir leur composante spatiale. [less ▲]

Detailed reference viewed: 43 (5 ULg)
See detailAtlas de Belgique - Guide de lecture
Binard, Marc ULg; De Maeyer, Philippe; De Temmerman, Leen et al

Book published by Academia Press (2008)

Toute personne qui se déplace dans un environnement complexe souhaite pouvoir s'orienter et tente pour ainsi dire de «cartographier» l'espace dans lequel il évolue. Tant les personnes que les institutions ... [more ▼]

Toute personne qui se déplace dans un environnement complexe souhaite pouvoir s'orienter et tente pour ainsi dire de «cartographier» l'espace dans lequel il évolue. Tant les personnes que les institutions ont besoin d'une représentation compréhensible des environnements spatiaux dans lesquels elles vivent et se déplacent. Un troisième Atlas de Belgique est édité afin de répondre à cette nécessité, avec pour objectif d'ordonner l'abondance de données disponibles, principalement en les visualisant dans l'espace. L'actuelle société belge, avec sa complexité, ses fortes différenciations sociales et spatiales, ses anciennes oppositions et ses nouveaux fossés, est ainsi cartographiée. Le troisième 'Atlas de Belgique' tente de présenter les données d'un maximum de sources en faisant ressortir leur composante spatiale. [less ▲]

Detailed reference viewed: 145 (30 ULg)