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Auteur J. Gudmundsson |
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Constrained free space diagrams: a tool for trajectory analysis / Kevin Buchin in International journal of geographical information science IJGIS, vol 24 n°7-8 (july 2010)
[article]
Titre : Constrained free space diagrams: a tool for trajectory analysis Type de document : Article/Communication Auteurs : Kevin Buchin, Auteur ; M. Buchin, Auteur ; J. Gudmundsson, Auteur Année de publication : 2010 Article en page(s) : pp 1101 - 1125 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] courbe
[Termes IGN] diagramme
[Termes IGN] direction
[Termes IGN] objet mobile
[Termes IGN] similitude
[Termes IGN] trajet (mobilité)
[Termes IGN] vitesseRésumé : (Auteur) Time plays an important role in the analysis of moving object data. For many applications it is not sufficient to only compare objects at exactly the same times, or to consider only the geometry of their trajectories. We show how to leverage between these two approaches by extending a tool from curve analysis, namely the free space diagram. Our approach also allows us to take further attributes of the objects like speed or direction into account. We demonstrate the usefulness of the new tool by applying it to the problem of detecting single file movement. A single file is a set of moving entities, which are following each other, one behind the other. Our algorithm is the first one developed for detecting such movement patterns. For this application, we analyse demonstrate the performance of our tool both theoretically experimentally. Numéro de notice : A2010-322 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810903569598 En ligne : https://doi.org/10.1080/13658810903569598 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30516
in International journal of geographical information science IJGIS > vol 24 n°7-8 (july 2010) . - pp 1101 - 1125[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-2010041 RAB Revue Centre de documentation En réserve L003 Disponible 079-2010042 RAB Revue Centre de documentation En réserve L003 Disponible Reporting leaders and followers among trajectories of moving point objects / M. Andersson in Geoinformatica, vol 12 n° 4 (December 2008)
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Titre : Reporting leaders and followers among trajectories of moving point objects Type de document : Article/Communication Auteurs : M. Andersson, Auteur ; J. Gudmundsson, Auteur ; P. Laube, Auteur ; et al., Auteur Année de publication : 2008 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] base de données d'objets mobiles
[Termes IGN] données spatiotemporelles
[Termes IGN] géomètrie algorithmique
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] objet mobile
[Termes IGN] quantité continue
[Termes IGN] quantité discrète
[Termes IGN] reconstruction d'itinéraire ou de trajectoireRésumé : (Auteur) Widespread availability of location aware devices (such as GPS receivers) promotes capture of detailed movement trajectories of people, animals, vehicles and other moving objects, opening new options for a better understanding of the processes involved. In this paper we investigate spatio-temporal movement patterns in large tracking data sets. We present a natural definition of the pattern ‘one object is leading others’, which is based on behavioural patterns discussed in the behavioural ecology literature. Such leadership patterns can be characterised by a minimum time length for which they have to exist and by a minimum number of entities involved in the pattern. Furthermore, we distinguish two models (discrete and continuous) of the time axis for which patterns can start and end. For all variants of these leadership patterns, we describe algorithms for their detection, given the trajectories of a group of moving entities. A theoretical analysis as well as experiments show that these algorithms efficiently report leadership patterns. Copyright Springer Numéro de notice : A2008-381 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-007-0037-9 En ligne : https://doi.org/10.1007/s10707-007-0037-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29374
in Geoinformatica > vol 12 n° 4 (December 2008)[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-08041 RAB Revue Centre de documentation En réserve L003 Disponible Efficient detection of patterns in 2D trajectories of moving points / J. Gudmundsson in Geoinformatica, vol 11 n° 2 (June - August 2007)
[article]
Titre : Efficient detection of patterns in 2D trajectories of moving points Type de document : Article/Communication Auteurs : J. Gudmundsson, Auteur ; Marc Van Kreveld, Auteur ; B. Speckmann, Auteur Année de publication : 2007 Article en page(s) : pp 195 - 215 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] approximation
[Termes IGN] base de données d'objets mobiles
[Termes IGN] exploration de données géographiques
[Termes IGN] géomètrie algorithmique
[Termes IGN] objet mobileRésumé : (Auteur) Moving point object data can be analyzed through the discovery of patterns in trajectories. We consider the computational efficiency of detecting four such spatio-temporal patterns, namely flock, leadership, convergence, and encounter, as defined by Laube et al., Finding REMO—detecting relative motion patterns in geospatial lifelines, 201–214, (2004). These patterns are large enough subgroups of the moving point objects that exhibit similar movement in the sense of direction, heading for the same location, and/or proximity. By the use of techniques from computational geometry, including approximation algorithms, we improve the running time bounds of existing algorithms to detect these patterns. Copyright Springer Numéro de notice : A2007-237 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-006-0002-z En ligne : https://doi.org/10.1007/s10707-006-0002-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28600
in Geoinformatica > vol 11 n° 2 (June - August 2007) . - pp 195 - 215[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-07021 RAB Revue Centre de documentation En réserve L003 Disponible