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A knowledge infrastructure for intelligent query answering in Location-based Services / S Yu in Geoinformatica, vol 14 n° 3 (July 2010)
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Titre : A knowledge infrastructure for intelligent query answering in Location-based Services Type de document : Article/Communication Auteurs : S Yu, Auteur ; Stefano Spaccapietra, Auteur Année de publication : 2010 Article en page(s) : pp 379 - 404 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] base de connaissances
[Termes IGN] gestion des connaissances (organisation)
[Termes IGN] infrastructure
[Termes IGN] mobilité humaine
[Termes IGN] ontologie
[Termes IGN] requête spatiale
[Termes IGN] service fondé sur la position
[Termes IGN] utilisateurRésumé : (Auteur) Intelligent query answering in Location-based Services refers to their capability to provide mobile users with personalized and contextualized answers. Personalization is expected to lead to answers that better match user’s interests, as inferable from the user’s profile. Contextualization aims at not selecting answers that for some reason would not be appropriate at the time and place of the user query. These goals are beyond the current state of art in LBS, or are provided based on ad hoc solutions specific to the application at hand. This paper reports on the results of an investigation aiming at defining the knowledge infrastructure that should be developed within the LBS to make it capable of returning intelligent answers. We first discuss the data management features that make LBS different from other query answering systems. Next we propose a data infrastructure that builds on the idea of modular ontologies. We explain how the relevant knowledge may be incrementally set up and dynamically maintained based on an application-independent approach. Last we show how this knowledge is used to reformulate user’s queries via personalized and contextualized rewriting. Numéro de notice : A2010-106 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s10707-010-0105-4 Date de publication en ligne : 21/01/2010 En ligne : https://doi.org/10.1007/s10707-010-0105-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30302
in Geoinformatica > vol 14 n° 3 (July 2010) . - pp 379 - 404[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2010031 RAB Revue Centre de documentation En réserve L003 Disponible Ontologies and database management system technology for The National Map / N. Wiegand in Cartographica, vol 45 n° 2 (June 2010)
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Titre : Ontologies and database management system technology for The National Map Type de document : Article/Communication Auteurs : N. Wiegand, Auteur Année de publication : 2010 Article en page(s) : pp 121 - 126 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] base de connaissances
[Termes IGN] classe d'objets
[Termes IGN] ontologie
[Termes IGN] requête spatiale
[Termes IGN] The National Map (USA)Résumé : (Auteur) Étant donné les nouvelles technologies sémantiques et la vision du US Geological Survey visant à améliorer la National Map (TNM), on explore dans le présent article l'utilisation potentielle des ontologies pour la TNM. On donne des exemples pour l'organisation de données, l'expansion de la requête, la modélisation par traits distinctifs et une base de connaissances liée à des relations spatiales explicites. Des exemples de requêtes à l'aide de protocoles SQL et SPARQL améliorés pour des données de la TNM montrent les nouveaux outils offerts pour la gestion de bases de données pour les ontologies. Comme première étape de la vision pour la TNM 3.0, l'auteur donne des types d'utilisations possibles et explique comment mettre en œuvre le système. Numéro de notice : A2010-290 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.3138/carto.45.2.121 Date de publication en ligne : 01/06/2010 En ligne : https://doi.org/10.3138/carto.45.2.121 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30484
in Cartographica > vol 45 n° 2 (June 2010) . - pp 121 - 126[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 031-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Spatio-temporal trajectory analysis of mobile objects following the same itinerary / Laurent Etienne (26/05/2010)
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Titre : Spatio-temporal trajectory analysis of mobile objects following the same itinerary Type de document : Article/Communication Auteurs : Laurent Etienne, Auteur ; Thomas Devogele , Auteur ; Alain Bouju, Auteur
Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 26/05/2010 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 38-2 Conférence : SDH 2010, 14th International Symposium on Spatial Data Handling, joint conference with ISPRS 26/05/2010 28/05/2010 Hong-Kong Hong-Kong Proceedings Springer Importance : 6 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse spatio-temporelle
[Termes IGN] comportement
[Termes IGN] exploration de données géographiques
[Termes IGN] navire
[Termes IGN] objet mobile
[Termes IGN] reconstruction d'itinéraire ou de trajectoire
[Termes IGN] trajectoire (véhicule non spatial)Résumé : (Auteur) More and more mobile objects are now equipped with sensors allowing real time monitoring of their movements. Nowadays, the data produced by these sensors can be stored in spatio-temporal databases. The main goal of this article is to perform a data mining on a huge quantity of mobile object's positions moving in an open space in order to deduce its behaviour. New tools must be defined to ease the detection of outliers. First of all, a zone graph is set up in order to define itineraries. Then, trajectories of mobile objects following the same itinerary are extracted from the spatio-temporal database and clustered. A statistical analysis on this set of trajectories lead to spatio-temporal patterns such as the main route and spatio-temporal channel followed by most of trajectories of the set. Using these patterns, unusual situations can be detected. Furthermore, a mobile object's behaviour can be defined by comparing its positions with these spatio-temporal patterns. In this article, this technique is applied to ships' movements in an open maritime area. Unusual behaviours such as being ahead of schedule or delayed or veering to the left or to the right of the main route are detected. A case study illustrates these processes based on ships' positions recorded during two years around the Brest area. This method can be extended to almost all kinds of mobile objects (pedestrians, aircrafts, hurricanes, ...) moving in an open area. Numéro de notice : C2010-047 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVIII/part2/Papers/50_Paper.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64319 Documents numériques
en open access
14253_ctap_isprs_vol38part2_50_paper_devogele.pdfAdobe Acrobat PDFAlgorithms for constrained k-nearest neighbor queries over moving object trajectories / Yunjun Gao in Geoinformatica, vol 14 n° 2 (April 2010)
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Titre : Algorithms for constrained k-nearest neighbor queries over moving object trajectories Type de document : Article/Communication Auteurs : Yunjun Gao, Auteur ; B. Zheng, Auteur ; G. Chen, Auteur ; Qi Li, Auteur Année de publication : 2010 Article en page(s) : pp 241 - 276 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] arbre-R
[Termes IGN] base de données d'objets mobiles
[Termes IGN] base de données spatiotemporelles
[Termes IGN] classification barycentrique
[Termes IGN] objet mobile
[Termes IGN] processus spatial
[Termes IGN] programmation par contraintes
[Termes IGN] requête spatialeRésumé : (Auteur) An important query for spatio-temporal databases is to find nearest trajectories of moving objects. Existing work on this topic focuses on the closest trajectories in the whole data space. In this paper, we introduce and solve constrained k-nearest neighbor (CkNN) queries and historical continuous CkNN (HCCkNN) queries on R-tree-like structures storing historical information about moving object trajectories. Given a trajectory set D, a query object (point or trajectory) q, a temporal extent T, and a constrained region CR, (i) a CkNN query over trajectories retrieves from D within T, the k (? 1) trajectories that lie closest to q and intersect (or are enclosed by) CR; and (ii) an HCCkNN query on trajectories retrieves the constrained k nearest neighbors (CkNNs) of q at any time instance of T. We propose a suite of algorithms for processing CkNN queries and HCCkNN queries respectively, with different properties and advantages. In particular, we thoroughly investigate two types of CkNN queries, i.e., CkNNP and CkNNT, which are defined with respect to stationary query points and moving query trajectories, respectively; and two types of HCCkNN queries, namely, HCCkNNP and HCCkNNT, which are continuous counterparts of CkNNP and CkNNT, respectively. Our methods utilize an existing data-partitioning index for trajectory data (i.e., TB-tree) to achieve low I/O and CPU cost. Extensive experiments with both real and synthetic datasets demonstrate the performance of the proposed algorithms in terms of efficiency and scalability. Copyright Springer Numéro de notice : A2010-067 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-009-0084-5 Date de publication en ligne : 28/04/2009 En ligne : https://doi.org/10.1007/s10707-009-0084-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30263
in Geoinformatica > vol 14 n° 2 (April 2010) . - pp 241 - 276[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Efficient evaluation of continuous spatio-temporal queries on moving objects whith uncertain velocity / Y. Huang in Geoinformatica, vol 14 n° 2 (April 2010)
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Titre : Efficient evaluation of continuous spatio-temporal queries on moving objects whith uncertain velocity Type de document : Article/Communication Auteurs : Y. Huang, Auteur ; C. Lee, Auteur Année de publication : 2010 Article en page(s) : pp 163 - 200 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] classification barycentrique
[Termes IGN] distance euclidienne
[Termes IGN] objet mobile
[Termes IGN] requête continue
[Termes IGN] requête spatiotemporelle
[Termes IGN] vitesseRésumé : (Auteur) Continuous Range (CR) query and Continuous K-Nearest Neighbor (CKNN) query are two important types of spatio-temporal queries. Given a time interval [ts , te ] and a moving query object q, a CR query is to find the moving objects whose Euclidean distances to q are within a user-given distance at each time instant within [ts , te ]. A CKNN query is to retrieve the K-Nearest Neighbors (KNNs) of this query object q at each time instant within [ts , te ]. In this paper, we investigate how to process these spatio-temporal queries efficiently under the situation that the velocity of each object is not fixed. This uncertainty on the velocity of object inevitably results in high complexity in processing spatio-temporal queries. We will discuss the complications incurred by this uncertainty and propose two algorithms, namely the Possibility-based possible within objects searching algorithm and the Possibility-based possible KNN searching algorithm, for the CR query and the CKNN query, respectively. A Possibility-based model is designed accordingly to quantify the possibility of each object being the result of a CR query or a CKNN query. Comprehensive experiments are performed to demonstrate the effectiveness and the efficiency of the proposed approaches. Copyright Springer Numéro de notice : A2010-064 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-009-0081-8 Date de publication en ligne : 23/04/2009 En ligne : https://doi.org/10.1007/s10707-009-0081-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30260
in Geoinformatica > vol 14 n° 2 (April 2010) . - pp 163 - 200[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Semantic enablement for Spatial Data Infrastructures / Krzysztof Janowicz in Transactions in GIS, vol 14 n° 2 (April 2010)
PermalinkPermalinkThe space package : tight integration between space and semantics / W. Van Hage in Transactions in GIS, vol 14 n° 2 (April 2010)
PermalinkVague spatio-thematic query processing: a qualitative approach to spatial closeness / R. Grütter in Transactions in GIS, vol 14 n° 2 (April 2010)
PermalinkUn graphe génératif pour la classification semi-supervisée / P. Gaillard in Ingénierie des systèmes d'information, ISI : Revue des sciences et technologies de l'information, RSTI, vol 15 n° 2 (mars - avril 2010)
PermalinkModèle et langage pour la manipulation de trajectoires spatio-temporelles / D. Zheni Triki in Revue internationale de géomatique, vol 20 n° 1 (mars - mai 2010)
PermalinkVolunteered geographic information to authoritative databases: linking contributor motivations to program characteristics / David Coleman in Geomatica, vol 64 n° 1 (March 2010)
PermalinkWater impoundment location: approach using GIS multicriteria decision making / Abdelkader Mendas in Revue internationale de géomatique, vol 20 n° 1 (mars - mai 2010)
PermalinkCreating and validating Object-Oriented Geographic Data Models: modeling flow within GIS / A. Glennon in Transactions in GIS, vol 14 n° 1 (February 2010)
PermalinkMultidimensional Map Algebra: design and implementation of a spatio-temporal GIS processing language / J. Mennis in Transactions in GIS, vol 14 n° 1 (February 2010)
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