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Auteur Guillaume Touya
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Documents disponibles écrits par cet auteur (158)
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DIOGEN, a multi-level oriented model for cartographic generalization / Adrien Maudet in International journal of cartography, vol 3 n° 1 (June 2017)
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Titre : DIOGEN, a multi-level oriented model for cartographic generalization Type de document : Article/Communication Auteurs : Adrien Maudet , Auteur ; Guillaume Touya
, Auteur ; Cécile Duchêne
, Auteur ; Sébastien Picault, Auteur
Année de publication : 2017 Projets : 1-Pas de projet / Article en page(s) : pp 121 - 133 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] AGENT
[Termes IGN] agent (intelligence artificielle)
[Termes IGN] CartACom
[Termes IGN] carte thématique
[Termes IGN] contrainte relationnelle
[Termes IGN] DIOGEN
[Termes IGN] données vectorielles
[Termes IGN] GAEL
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] modèle (conceptuel) de généralisation
[Termes IGN] programmation par contraintes
[Termes IGN] système multi-agents
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Among approaches for automated generalization of vector data, we focus on the multi-agent paradigm: cartographic objects are modeled as agents (autonomous objects) that apply generalization algorithms to themselves to satisfy cartographic constraints. Several agent levels are considered, for example, individual agents, such as a building, and agents representing a group of agents, such as an urban block composed of the surrounding roads and contained buildings. Several multi-agent models were proposed to automate the orchestration of map generalization processes. Existing multi-agent generalization models have different approaches to manage the relations between agent levels. In this paper, we unify existing models, adapting a multi-level simulation model, to simplify interactions between agents in different levels. We propose the DIOGEN model, in which the principle of interactions between agents of different levels is adapted to constraint-driven cartographic generalization. DIOGEN unifies three existing multi-agent generalization models (AGENT, CartACom and GAEL), combine their behaviors and take advantage of their skills. Our proposal is evaluated on different use cases: instances of topographic mapping, and mapping of hiking routes over topographic data as an example of thematic mapping. Numéro de notice : A2017-321 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/23729333.2017.1300997 Date de publication en ligne : 20/04/2017 En ligne : http://dx.doi.org/10.1080/23729333.2017.1300997 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85379
in International journal of cartography > vol 3 n° 1 (June 2017) . - pp 121 - 133[article]Assessing crowdsourced POI quality: combining methods based on reference data, history, and spatial relations / Guillaume Touya in ISPRS International journal of geo-information, vol 6 n° 3 (March 2017)
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Titre : Assessing crowdsourced POI quality: combining methods based on reference data, history, and spatial relations Type de document : Article/Communication Auteurs : Guillaume Touya , Auteur ; Vyron Antoniou, Auteur ; Ana-Maria Olteanu-Raimond
, Auteur ; Marie-Dominique Van Damme
, Auteur
Année de publication : 2017 Projets : ENERGIC / Capineri, Cristina Article en page(s) : pp 1 - 29 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] analyse multicritère
[Termes IGN] changement temporel
[Termes IGN] données localisées des bénévoles
[Termes IGN] évaluation des données
[Termes IGN] OpenStreetMap
[Termes IGN] point d'intérêt
[Termes IGN] production participative
[Termes IGN] qualité des donnéesRésumé : (Auteur) With the development of location-aware devices and the success and high use of Web 2.0 techniques, citizens are able to act as sensors by contributing geographic information. In this context, data quality is an important aspect that should be taken into account when using this source of data for different purposes. The goal of the paper is to analyze the quality of crowdsourced data and to study its evolution over time. We propose two types of approaches: (1) use the intrinsic characteristics of the crowdsourced datasets; or (2) evaluate crowdsourced Points of Interest (POIs) using external datasets (i.e., authoritative reference or other crowdsourced datasets), and two different methods for each approach. The potential of the combination of these approaches is then demonstrated, to overcome the limitations associated with each individual method. In this paper, we focus on POIs and places coming from the very successful crowdsourcing project: OpenStreetMap. The results show that the proposed approaches are complementary in assessing data quality. The positive results obtained for data matching show that the analysis of data quality through automatic data matching is possible but considerable effort and attention are needed for schema matching given the heterogeneity of OSM and the representation of authoritative datasets. For the features studied, it can be noted that change over time is sometimes due to disagreements between contributors, but in most cases the change improves the quality of the data. Numéro de notice : A2017-188 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/ijgi6030080 Date de publication en ligne : 14/03/2017 En ligne : http://dx.doi.org/10.3390/ijgi6030080 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84796
in ISPRS International journal of geo-information > vol 6 n° 3 (March 2017) . - pp 1 - 29[article]The scale of VGI in map production: A perspective on European national mapping agencies / Ana-Maria Olteanu-Raimond in Transactions in GIS, vol 21 n° 1 (February 2017)
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[article]
Titre : The scale of VGI in map production: A perspective on European national mapping agencies Type de document : Article/Communication Auteurs : Ana-Maria Olteanu-Raimond , Auteur ; Glen Hart, Auteur ; Giles M. Foody, Auteur ; Guillaume Touya
, Auteur ; et al., Auteur
Année de publication : 2017 Projets : 3-projet - voir note / Capineri, Cristina Article en page(s) : pp 74 – 90 Note générale : bibliographie
This study was supported by the COST Action TD1202 Mapping and the Citizen Sensor funded by the European Union Seventh Framework Programme and the European Science Foundation.Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] complètement
[Termes IGN] données localisées des bénévoles
[Termes IGN] mise à jour
[Termes IGN] organisme cartographique national
[Termes IGN] qualité des donnéesRésumé : (auteur) The perspective of European National Mapping Agencies (NMA) on the role of citizen sensing in map production was explored. The NMAs varied greatly in their engagement with the community generating volunteered geographic information (VGI) and in their future plans. From an assessment of NMA standard practices, it was evident that much VGI was acquired with a positional accuracy that, while less than that typically acquired by NMAs, actually exceeded the requirements of the nominal data capture scale used by most NMAs. Opportunities for VGI use in map revision and updating were evident, especially for agencies that use a continuous rather than cyclical updating policy. Some NMAs had also developed systems to engage with citizen sensors and examples are discussed. Only rarely was VGI used to collect data on features beyond the standard set used by the NMAs. The potential role of citizen sensing and so its current scale of use by NMAs is limited by a series of concerns, notably relating to issues of data quality, the nature and motivation of the contributors, legal issues, the sustainability of data source, and employment fears of NMA staff. Possible priorities for future research and development are identified to help ensure that the potential of VGI in mapping is realized. Numéro de notice : A2017-161 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Autre URL associée : vers HAL ouvert Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12189 Date de publication en ligne : 25/06/2016 En ligne : http://dx.doi.org/10.1111/tgis.12189 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84685
in Transactions in GIS > vol 21 n° 1 (February 2017) . - pp 74 – 90[article]
contenu dans ICC 2017, the 28th International Cartographic Conference, à Washington, USA, 2–7 July 2017, proceedings / International cartographic association = association cartographique internationale (2017)![]()
Titre : Alternative transitions between existing representations in multi-scale maps Type de document : Article/Communication Auteurs : Marion Dumont , Auteur ; Guillaume Touya
, Auteur ; Cécile Duchêne
, Auteur
Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2017 Autre Editeur : Göttingen : Copernicus publications Collection : Proceedings of the ICA num. 1 Conférence : ICC 2017, 28th International Cartographic Conference ICA 02/07/2017 07/07/2017 Washington DC Etats-Unis OA Proceedings of the ICA Importance : 6 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] continuité cartographique
[Termes IGN] généralisation automatique de données
[Termes IGN] représentation multiple
[Termes IGN] zoom
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Map users may have issues to achieve multi-scale navigation tasks, as cartographic objects may have various representations across scales. We assume that adding intermediate representations could be one way to reduce the differences between existing representations, and to ease the transitions across scales. We consider an existing multi-scale map on the scale range from 1:25k to 1:100k scales. Based on hypotheses about intermediate representations design, we build custom multi-scale maps with alternative transitions. We will conduct in a next future a user evaluation to compare the efficiency of these alternative maps for multi-scale navigation. This paper discusses the hypotheses and production process of these alternative maps. Numéro de notice : C2017-009 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/ica-proc-1-33-2018 Date de publication en ligne : 31/07/2017 En ligne : http://dx.doi.org/10.5194/ica-proc-1-33-2018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86221 Building social networks in volunteered geographic information communities: What contributor behaviours reveal about crowdsourced data quality / Quy Thy Truong (2017)
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contenu dans Proceedings of workshops and posters at the 13th international conference on spatial information theory (COSIT 2017) / Paolo Fogliaroni (2017)
Titre : Building social networks in volunteered geographic information communities: What contributor behaviours reveal about crowdsourced data quality Type de document : Article/Communication Auteurs : Quy Thy Truong , Auteur ; Guillaume Touya
, Auteur ; Cyril de Runz, Auteur
Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2017 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Conférence : COSIT 2017, 13th international conference on spatial information theory 04/09/2017 08/09/2017 L'Aquila Italie Proceedings Springer Importance : pp 125 - 131 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] données localisées des bénévoles
[Termes IGN] OpenStreetMap
[Termes IGN] qualité des données
[Termes IGN] réseau socialRésumé : (auteur) Modelling social interactions in volunteered geographic information projects requires defining what binds contributors together. In order to be as realistic as possible, instead of choosing one social aspect to study, we choose to build a multi-layered social network that contains several types of interaction between VGI contributors. The analysis of such a multigraph should allow the detection of communities and the definition of typical profiles of contributors. A use case on OpenStreetMap illustrates what inferences can be made about contributions based on their authors. Numéro de notice : C2017-017 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-319-63946-8_25 Date de publication en ligne : 30/09/2017 En ligne : https://doi.org/10.1007/978-3-319-63946-8_25 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88224 Citizen empowered mapping, ch. 1. Level of details harmonization operations in OpenStreetMap based large scale maps / Guillaume Touya (2017)
PermalinkContinuously generalizing buildings to built-up areas by aggregating and growing / Dongliang Peng (2017)
PermalinkPermalinkPermalinkHow to design a cartographic continuum to help users to navigate between two topographic styles? / Jérémie Ory (2017)
PermalinkMapping and the citizen sensor, ch 4. Production of topographic maps with VGI: quality management and automation / Guillaume Touya (2017)
PermalinkMapping and the citizen sensor, ch 6. Considerations of privacy, ethics and legal issues in volunteered geographic information / Peter Mooney (2017)
PermalinkPotentiel des données géolocalisées issues de la foule pour les questions de mobilité et tourisme : quelques exemples issus de la littérature / Laurence Jolivet (2017)
PermalinkProgressive block graying and landmarks enhancing as intermediate representations between buildings and urban areas / Guillaume Touya (2017)
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HDR defense in 2017
Research fellow in CRENAU research team from AAU lab in Nantes