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A space-time varying graph for modelling places and events in a network / Ikechukwu Maduako in International journal of geographical information science IJGIS, vol 33 n° 10 (October 2019)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 33 n° 10 (October 2019) . - pp 1915 - 1935 Titre : A space-time varying graph for modelling places and events in a network Type de document : Article/Communication Auteurs : Ikechukwu Maduako, Auteur ; Monica Wachowicz, Auteur Année de publication : 2019 Article en page(s) : pp 1915 - 1935 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] accident de la route [Termes IGN] analyse des risques [Termes IGN] analyse spatio-temporelle [Termes IGN] connexité (graphes) [Termes IGN] graphe [Termes IGN] relation topologique [Termes IGN] représentation spatiale [Termes IGN] réseau routier [Termes IGN] système d'information géographique [Termes IGN] voisinage (relation topologique) Résumé : (auteur) Modelling topological relationships between places and events is challenging especially because these relationships are dynamic, and their evolutionary analysis relies on the explanatory power of representing their interactions across different temporal resolutions. In this paper, we introduce the Space-Time Varying Graph (STVG) based on the whole graph approach that combines directed and bipartite subgraphs with a time-tree for representing the complex interaction between places and events across time. We demonstrate how the proposed STVG can be exploited to identify and extract evolutionary patterns of traffic accidents using graph metrics, ad-hoc graph queries and clustering algorithms. The results reveal evolutionary patterns that uncover the places with high incidence of accidents over different time resolutions, reveal the main reasons why the traffic accidents have occurred, and disclose evolving communities of densely connected traffic accidents over time. Numéro de notice : A2019-393 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2019.1603386 Date de publication en ligne : 17/04/2019 En ligne : https://doi.org/10.1080/13658816.2019.1603386 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93497 [article]

Finding spatial outliers in collective mobility patterns coupled with social ties / Monica Wachowicz in International journal of geographical information science IJGIS, vol 30 n° 9-10 (September - October 2016)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 30 n° 9-10 (September - October 2016) . - pp 1806 - 1831 Titre : Finding spatial outliers in collective mobility patterns coupled with social ties Type de document : Article/Communication Auteurs : Monica Wachowicz, Auteur ; Tianyu Liu, Auteur Année de publication : 2016 Article en page(s) : pp 1806 - 1831 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] centroïde [Termes IGN] contenu généré par les utilisateurs [Termes IGN] données issues des réseaux sociaux [Termes IGN] données massives [Termes IGN] interface en langage naturel [Termes IGN] mobilité humaine [Termes IGN] statistiques d'appels détaillés [Termes IGN] traitement de données localisées [Termes IGN] traitement du langage naturel [Termes IGN] Twitter [Termes IGN] valeur aberrante Résumé : (Auteur) Currently the increase in the variety and volume of data sources is demanding new data analytical workflows for exploring them concurrently, especially if the goal is to detect spatial outliers. In this paper, we propose a data analytical workflow for exploring Call Detail Records in conjunction with geotagged tweets. The aim was to investigate how massive data point observations can be analyzed to detect spatial outliers in collective mobility patterns that are coupled with social ties. This workflow consists of analytical tasks that are developed based on the a-priori assumption of two isometric spaces where Natural Language Processing techniques are used to find spatial clusters from geotagged tweets in a Social Space which are later used to aggregate the Call Detail Records generated by antennas located in the Mobility Space. The dynamic weighted centroids that are given by the mean location of the number of calls per hour of all antennas that belong to a particular cluster are used to compute Standard Deviation Ellipses. The longer the period of time a weighted centroid stays outside of the 99.7% probability region of an ellipse, the highest the likelihood that they are spatial outliers. The workflow was implemented for the city of Dakar in Senegal. The results indicate that the further the hourly weighted centroids are skewed from the normal mean of an ellipse, the stronger the influence of a cluster is in finding spatial outliers. Furthermore, the longer the period of time the outliers stays outside of the 99.7% probability region of an ellipse, the highest the likelihood that the outliers are genuine and can be associated to extraordinary events such as natural disasters and national holidays. Numéro de notice : A2016-569 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2016.1144887 En ligne : http://dx.doi.org/10.1080/13658816.2016.1144887 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81713 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2016051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Towards an integrated model of interoperability for Spatial Data Infrastructures / M.A. Manson in Transactions in GIS, vol 13 n° 1 (February 2009)  

Public [article]  inTransactions in GIS > vol 13 n° 1 (February 2009) . - pp 43 - 67 Titre : Towards an integrated model of interoperability for Spatial Data Infrastructures Type de document : Article/Communication Auteurs : M.A. Manson, Auteur ; Monica Wachowicz, Auteur ; M.A. Bernabe, Auteur Année de publication : 2009 Article en page(s) : pp 43 - 67 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] implémentation (informatique) [Termes IGN] infrastructure nationale des données localisées [Termes IGN] interopérabilité [Termes IGN] métadonnées [Termes IGN] structure hiérarchique de données Résumé : (Auteur) Although there is a vast literature available on interoperability models, and their respective interoperability levels, limited research has been carried out on the development of interoperability models for the implementation of Spatial Data Infrastructures. This article demonstrates the important role of metadata elements in the formalisation of interoperability models for the implementation of Spatial Data Infrastructures. It describes an approach for designing an integrated interoperability model based on the definition of a common template that integrates seven interoperability levels. They are: technical, syntactic, semantic, pragmatic, dynamic, conceptual and organisational levels. A non-hierarchical structure is proposed to ensure the relationship among these interoperability levels. Copyright Blackwell Publishing Numéro de notice : A2009-544 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2009.01143.x En ligne : https://doi.org/10.1111/j.1467-9671.2009.01143.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30173 [article]

The European information society : Leading the way with geo-information, AGILE 2007 / Sara Irina Fabrikant (2007)  

Public Titre : The European information society : Leading the way with geo-information, AGILE 2007 : [selected papers, 10th AGILE conference, 2007, Aalborg, Denmark] Type de document : Actes de congrès Auteurs : Sara Irina Fabrikant, Éditeur scientifique ; Monica Wachowicz, Éditeur scientifique Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2007 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Conférence : AGILE 2007, 10th International Conference on Geographic Information Science Aalborg Danemark OA Proceedings Importance : 486 p. Format : 16 x 24 cm Accompagnement : Sans Cédérom ISBN/ISSN/EAN : 978-3-540-72384-4 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] convivialité [Termes IGN] données localisées [Termes IGN] état de l'art [Termes IGN] Infrastructure de données [Termes IGN] interopérabilité [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] monde virtuel [Termes IGN] objet mobile [Termes IGN] ontologie [Termes IGN] qualité des données [Termes IGN] raisonnement spatial [Termes IGN] service web géographique Résumé : (éditeur) The Association of Geographic Information Laboratories for Europe (AGILE) was established in early 1998 to promote academic teaching and research on GIS at the European level. AGILE seeks to ensure that the views of the geographic information teaching and research community are fully represented in the discussions that take place on future European - search agendas and it also provides a permanent scientific forum where geographic information researchers can meet and exchange ideas and - periences at the European level. In 2007 AGILE provided - for the first time since its existence - a book constituting a collection of scientific papers that were submitted as full papers to the annual AGILE conference and went through a competitive and thorough review process. Numéro de notice : 17088 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Actes DOI : 10.1007/978-3-540-72385-1 En ligne : https://doi.org/10.1007/978-3-540-72385-1 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79464

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17088-01	CG2007	Livre	Centre de documentation	Congrès	Disponible

The integration of geographic visualization with knowledge discovery in databases and geocomputation / M. Gahegan in Cartography and Geographic Information Science, vol 28 n° 1 (January 2001)  

Public [article]  inCartography and Geographic Information Science > vol 28 n° 1 (January 2001) . - pp 29 - 44 Titre : The integration of geographic visualization with knowledge discovery in databases and geocomputation Type de document : Article/Communication Auteurs : M. Gahegan, Auteur ; Monica Wachowicz, Auteur ; et al., Auteur Année de publication : 2001 Article en page(s) : pp 29 - 44 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] analyse visuelle [Termes IGN] base de connaissances [Termes IGN] base de données localisées [Termes IGN] cartographie numérique [Termes IGN] découverte de connaissances [Termes IGN] état de l'art [Termes IGN] exploration de données géographiques [Termes IGN] visualisation Résumé : (Auteur) This paper details the research agenda of the International Cartographic Association Commission on Visualization / Working group on Database-Visualization Links. The paper stressed the need for the closer integration of the three largely disparate technologies : geographic visualization, knowledge discovery in databases, and geocomputation. The introduction explains the meaning behind these terms, the ethos behind their practice, and their connections within the broad realm of knowledge construction activities. The state of the art is then described for different approaches to knowledge construction, concentrating where possible on visual and geographically oriented methods. From these sections, a research agenda is synthetized in the form of three sets of research questions adressing : (1) Visual approches to data mining ; (2) visual support for knowledge construction and geocomputation ; and (3) database and data models that must be satisfied to make visually-led knowledge construction a reality in the geographic realm. Conclusions relate this agenda to issues of (1) data, (2) geographic knowledge, and (3) the visualization environment and pose significant challenges to the way currently represent geographic information and knowledge within computational systems. Numéro de notice : A2001-160 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304001782173952 En ligne : https://doi.org/10.1559/152304001782173952 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21855 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-01011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Constructing knowledge from multivariate spatiotemporal data : integrating geographical visualization with knowledge discovery in database methods / Alan M. MacEachren in International journal of geographical information science IJGIS, vol 13 n° 4 (July 1999)  

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Object-oriented design for temporal GIS / Monica Wachowicz (1999)

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