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Automatic classification of retail spaces from a large scale topographic database / William A Mackaness in Transactions in GIS, vol 15 n° 3 (July 2011)
[article]
Titre : Automatic classification of retail spaces from a large scale topographic database Type de document : Article/Communication Auteurs : William A Mackaness, Auteur ; Omair Chaudhry, Auteur Année de publication : 2011 Article en page(s) : pp 291 - 307 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] base de données topographiques
[Termes IGN] classification automatique
[Termes IGN] classification bayesienne
[Termes IGN] classification floue
[Termes IGN] commerce de détail
[Termes IGN] grande échelleRésumé : (Auteur) There is considerable interest in understanding the distribution patterns of different types of retail space, over time, and doing so at a national scale. Yet a lack of suitable data, coupled with poor classification schemas, has stymied efforts to create such a national perspective. This research reports on metrics and classification methodologies that have been applied to large scale topographic data, that afford a systematic classification of certain retail spaces potentially at the national coverage. By analysing the form, composition, extent and patterns of buildings within retail spaces, together with their degree of centrality and levels of access, we demonstrate that it is possible to classify different types of retail space. The research illustrates the utility of fine scale topographic data beyond mere mapping. The article compares three methodologies used for classification (Boolean, fuzzy logic and Bayesian modelling) and evaluates them through comparison with known locations of various retail types as a way of assessing the validity of these approaches. The quality of the results are good, though the work highlights the inconsistency in definitions that currently exist – reflecting, as much as anything, the shifting sands of definitions of various retail spaces that ebb and flow according to consumer needs, and the ambitions of urban planners. Numéro de notice : A2011-225 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2011.01259.x Date de publication en ligne : 06/06/2011 En ligne : https://doi.org/10.1111/j.1467-9671.2011.01259.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31003
in Transactions in GIS > vol 15 n° 3 (July 2011) . - pp 291 - 307[article]Building agent-based walking models by machine-learning on diverse databases of space-time trajectory samples / Paul M. Torrens in Transactions in GIS, vol 15 supplement s1 (July 2011)
[article]
Titre : Building agent-based walking models by machine-learning on diverse databases of space-time trajectory samples Type de document : Article/Communication Auteurs : Paul M. Torrens, Auteur ; W. Griffin, Auteur ; X. Li, Auteur Année de publication : 2011 Article en page(s) : pp 67 - 94 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] agent (intelligence artificielle)
[Termes IGN] analyse spatiale
[Termes IGN] apprentissage automatique
[Termes IGN] base de données spatiotemporelles
[Termes IGN] itinéraire
[Termes IGN] milieu urbain
[Termes IGN] navigation pédestre
[Termes IGN] piéton
[Termes IGN] service fondé sur la position
[Termes IGN] trajet (mobilité)Résumé : (Auteur) We introduce a novel scheme for automatically deriving synthetic walking (locomotion) and movement (steering and avoidance) behavior in simulation from simple trajectory samples. We use a combination of observed and recorded real-world movement trajectory samples in conjunction with synthetic, agent-generated, movement as inputs to a machine-learning scheme. This scheme produces movement behavior for non-sampled scenarios in simulation, for applications that can differ widely from the original collection settings. It does this by benchmarking a simulated pedestrian's relative behavioral geography, local physical environment, and neighboring agent-pedestrians; using spatial analysis, spatial data access, classification, and clustering. The scheme then weights, trains, and tunes likely synthetic movement behavior, per-agent, per-location, per-time-step, and per-scenario. To prove its usefulness, we demonstrate the task of generating synthetic, non-sampled, agent-based pedestrian movement in simulated urban environments, where the scheme proves to be a useful substitute for traditional transition-driven methods for determining agent behavior. The potential broader applications of the scheme are numerous and include the design and delivery of location-based services, evaluation of architectures for mobile communications technologies, what-if experimentation in agent-based models with hypotheses that are informed or translated from data, and the construction of algorithms for extracting and annotating space-time paths in massive data-sets. Numéro de notice : A2011-251 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2011.01261.x Date de publication en ligne : 09/06/2011 En ligne : https://doi.org/10.1111/j.1467-9671.2011.01261.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31029
in Transactions in GIS > vol 15 supplement s1 (July 2011) . - pp 67 - 94[article]Query-aware location anonymization for road networks / C. Chow in Geoinformatica, vol 15 n° 3 (July 2011)
[article]
Titre : Query-aware location anonymization for road networks Type de document : Article/Communication Auteurs : C. Chow, Auteur ; M. Mokbel, Auteur ; Jie Bao, Auteur ; X. Liu, Auteur Année de publication : 2011 Article en page(s) : pp 571 - 607 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] espace euclidien
[Termes IGN] requête spatiale
[Termes IGN] réseau routier
[Termes IGN] service fondé sur la positionRésumé : (Auteur) Recently, several techniques have been proposed to protect the user location privacy for location-based services in the Euclidean space. Applying these techniques directly to the road network environment would lead to privacy leakage and inefficient query processing. In this paper, we propose a new location anonymization algorithm that is designed specifically for the road network environment. Our algorithm relies on the commonly used concept of spatial cloaking, where a user location is cloaked into a set of connected road segments of a minimum total length L including at least K users. Our algorithm is “query-aware” as it takes into account the query execution cost at a database server and the query quality, i.e., the number of objects returned to users by the database server, during the location anonymization process. In particular, we develop a new cost function that balances between the query execution cost and the query quality. Then, we introduce two versions of our algorithm, namely, pure greedy and randomized greedy, that aim to minimize the developed cost function and satisfy the user specified privacy requirements. To accommodate intervals with a high workload, we introduce a shared execution paradigm that boosts the scalability of our location anonymization algorithm and the database server to support large numbers of queries received in a short time period. Extensive experimental results show that our algorithms are more efficient and scalable than the state-of-the-art technique, in terms of both query execution cost and query quality. The results also show that our algorithms have very strong resilience to two privacy attacks, namely, the replay attack and the center-of-cloaked-area attack. Numéro de notice : A2011-212 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-010-0117-0 Date de publication en ligne : 06/11/2010 En ligne : https://doi.org/10.1007/s10707-010-0117-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30990
in Geoinformatica > vol 15 n° 3 (July 2011) . - pp 571 - 607[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2011031 RAB Revue Centre de documentation En réserve L003 Disponible The partial sequenced route query with traveling rules in road networks / H. Chen in Geoinformatica, vol 15 n° 3 (July 2011)
[article]
Titre : The partial sequenced route query with traveling rules in road networks Type de document : Article/Communication Auteurs : H. Chen, Auteur ; W. Ku, Auteur ; M. Sun, Auteur ; R. Zimmermann, Auteur Année de publication : 2011 Article en page(s) : pp 541 - 569 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] calcul d'itinéraire
[Termes IGN] itinéraire
[Termes IGN] point d'intérêt
[Termes IGN] requête spatiale
[Termes IGN] réseau routier
[Termes IGN] service fondé sur la positionRésumé : (Auteur) In modern geographic information systems, route search represents an important class of queries. In route search related applications, users may want to define a number of traveling rules (traveling preferences) when they plan their trips. However, these traveling rules are not considered in most existing techniques. In this paper, we propose a novel spatial query type, the multi-rule partial sequenced route (MRPSR) query, which enables efficient trip planning with user defined traveling rules. The MRPSR query provides a unified framework that subsumes the well-known trip planning query (TPQ) and the optimal sequenced route (OSR) query. The difficulty in answering MRPSR queries lies in how to integrate multiple choices of points-of-interest (POI) with traveling rules when searching for satisfying routes. We prove that MRPSR query is NP-hard and then provide three algorithms by mapping traveling rules to an activity on vertex network. Afterwards, we extend all the proposed algorithms to road networks. By utilizing both real and synthetic POI datasets, we investigate the performance of our algorithms. The results of extensive simulations show that our algorithms are able to answer MRPSR queries effectively and efficiently with underlying road networks. Compared to the Light Optimal Route Discoverer (LORD) based brute-force solution, the response time of our algorithms is significantly reduced while the distances of the computed routes are only slightly longer than the shortest route. Numéro de notice : A2011-211 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-010-0115-2 Date de publication en ligne : 03/09/2010 En ligne : https://doi.org/10.1007/s10707-010-0115-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30989
in Geoinformatica > vol 15 n° 3 (July 2011) . - pp 541 - 569[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2011031 RAB Revue Centre de documentation En réserve L003 Disponible MARTS, Conception d’un système mobile de réalité augmentée dédié au tourisme / Nehla Ghouaiel (06/06/2011)
Titre : MARTS, Conception d’un système mobile de réalité augmentée dédié au tourisme Type de document : Article/Communication Auteurs : Nehla Ghouaiel, Auteur ; Jean-Marc Cieutat, Auteur ; Jean-Pierre Jessel, Auteur Editeur : Toulouse [France] : Institut de Recherche en Informatique de Toulouse IRIT Année de publication : 06/06/2011 Conférence : Ubimob 2011, Mobilité et Ubiquité 06/06/2011 08/06/2011 Toulouse France Importance : 5 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] informatique ubiquitaire
[Termes IGN] interface mobile
[Termes IGN] milieu urbain
[Termes IGN] navigation pédestre
[Termes IGN] point d'intérêt
[Termes IGN] réalité augmentée
[Termes IGN] téléphone intelligent
[Termes IGN] tourismeRésumé : (Auteur) Le but de cet article est de montrer comment les interfaces mobiles et la Réalité Augmentée (RA) peuvent s'avérer être une assistance précieuse à la navigation piétonne. Le support de l'étude est tout naturellement le Smartphone qui est devenu en quelques années l'appareil qui nous est le plus familier, qui nous accompagne quotidiennement partout où nous nous déplaçons. Après avoir examiné les différentes situations auxquelles peut être confronté un touriste qui visite un environnement urbain pour la première fois, nous proposons le concept d'un nouveau système multimodal, le système MARTS [Mobile Augmented Reality Touring System], d'aide à la navigation piétonne que nous prévoyons réaliser. Numéro de notice : C2011-057 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : https://hal.archives-ouvertes.fr/hal-00609999 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64313 Navigation the indoor/outdoor location standards maze / Steven Ramage in Geoinformatics, vol 14 n° 4 (01/06/2011)PermalinkPermalinkToward seamless indoor-outdoor applications : developing stakeholder-oriented location-based services / K. Ogawa in Geo-spatial Information Science, vol 14 n° 2 (01/06/2011)PermalinkPermalinkCartoMundi, collectio chartarum orbe terrae / Jean-Luc Arnaud in Géomatique expert, n° 80 (01/05/2011)PermalinkGeom@tice : le point sur l'enseignement à distance de la géomatique / Fabien Guerreiro in Géomatique expert, n° 80 (01/05/2011)PermalinkAAM modelling aids Brisbane floods crisis / J. Blackburn in GEO: Geoconnexion international, vol 10 n° 4 (april 2011)PermalinkCapitalisation d´expériences pour la mise en place d´observatoires de pratiques agricoles : Une approche fondée sur l´exploitation de narrations / Florence Le Ber in Revue internationale de géomatique, vol 21 n° 1 (mars – mai 2011)PermalinkCollaborative web-GIS design: a case study for road risk analysis and monitoring / Francesco Pirotti in Transactions in GIS, vol 15 n° 2 (April 2011)PermalinkPotentialité du géoweb : l’Internet sémantique géographique / Robert Laurini in Espace géographique, vol 40 n° 2 (avril - juin 2011)Permalink