Descripteur
Termes IGN > sciences humaines et sociales > économie > macroéconomie > secteur tertiaire > secteur de l'information > média > internet > toile d'araignée mondiale > web sémantique
web sémantique |
Documents disponibles dans cette catégorie (369)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Computing and querying strict, approximate, and metrically refined topological relations in linked geographic data / Blake Regalia in Transactions in GIS, vol 23 n° 3 (June 2019)
[article]
Titre : Computing and querying strict, approximate, and metrically refined topological relations in linked geographic data Type de document : Article/Communication Auteurs : Blake Regalia, Auteur ; Krzysztof Janowicz, Auteur ; Grant McKenzie, Auteur Année de publication : 2019 Article en page(s) : pp 601 - 619 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] DBpedia
[Termes IGN] données localisées
[Termes IGN] entité géographique
[Termes IGN] graphe
[Termes IGN] relation topologique
[Termes IGN] requête spatiale
[Termes IGN] réseau sémantique
[Termes IGN] web des donnéesRésumé : (Auteur) Geographic entities and the information associated with them play a major role in Web‐scale knowledge graphs such as Linked Data. Interestingly, almost all major datasets represent places and even entire regions as point coordinates. There are two key reasons for this. First, complex geometries are difficult to store and query using the current Linked Data technology stack to a degree where many queries take minutes to return or will simply time out. Second, the absence of complex geometries confirms a common suspicion among GIScientists, namely that for many everyday queries place‐based relational knowledge is more relevant than raw geometries alone. To give an illustrative example, the statement that the White House is in Washington, DC is more important for gaining an understating of the city than the exact geometries of both entities. This does not imply that complex geometries are unimportant but that (topological) relations should also be extracted from them. As Egenhofer and Mark (1995b) put it in their landmark paper on naive geography, topology matters, metric refines. In this work we demonstrate how to compute and utilize strict, approximate, and metrically refined topological relations between several geographic feature types in DBpedia and compare our results to approaches that compute result sets for topological queries on the fly. Numéro de notice : A2019-256 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12548 Date de publication en ligne : 26/06/2019 En ligne : https://doi.org/10.1111/tgis.12548 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93014
in Transactions in GIS > vol 23 n° 3 (June 2019) . - pp 601 - 619[article]Deeply integrating linked data with geographic information systems / Gengchen Mai in Transactions in GIS, vol 23 n° 3 (June 2019)
[article]
Titre : Deeply integrating linked data with geographic information systems Type de document : Article/Communication Auteurs : Gengchen Mai, Auteur ; Krzysztof Janowicz, Auteur ; Bo Yan, Auteur ; Simon Scheider, Auteur Année de publication : 2019 Article en page(s) : pp 579 - 600 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] connecteur logiciel
[Termes IGN] graphe
[Termes IGN] ontologie
[Termes IGN] réseau sémantique
[Termes IGN] système d'information géographique
[Termes IGN] web des donnéesRésumé : (Auteur) The realization that knowledge often forms a densely interconnected graph has fueled the development of graph databases, Web‐scale knowledge graphs and query languages for them, novel visualization and query paradigms, as well as new machine learning methods tailored to graphs as data structures. One such example is the densely connected and global Linked Data cloud that contains billions of statements about numerous domains, including life science and geography. While Linked Data has found its way into everyday applications such as search engines and question answering systems, there is a growing disconnect between the classical ways in which Geographic Information Systems (GIS) are still used today and the open‐ended, exploratory approaches used to retrieve and consume data from knowledge graphs such as Linked Data. In this work, we conceptualize and prototypically implement a Linked Data connector framework as a set of toolboxes for Esri's ArcGIS to close this gap and enable the retrieval, integration, and analysis of Linked Data from within GIS. We discuss how to connect to Linked Data endpoints, how to use ontologies to probe data and derive appropriate GIS representations on the fly, how to make use of reasoning, how to derive data that are ready for spatial analysis out of RDF triples, and, most importantly, how to utilize the link structure of Linked Data to enable analysis. The proposed Linked Data connector framework can also be regarded as the first step toward a guided geographic question answering system over geographic knowledge graphs. Numéro de notice : A2019-255 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12538 Date de publication en ligne : 11/06/2019 En ligne : https://doi.org/10.1111/tgis.12538 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93013
in Transactions in GIS > vol 23 n° 3 (June 2019) . - pp 579 - 600[article]A framework for connecting two interoperability universes: OGC Web Feature Services and Linked Data / Luis Vilches-Blazquez in Transactions in GIS, vol 23 n° 1 (February 2019)
[article]
Titre : A framework for connecting two interoperability universes: OGC Web Feature Services and Linked Data Type de document : Article/Communication Auteurs : Luis Vilches-Blazquez, Auteur ; Jhonny Saavedra, Auteur Année de publication : 2019 Article en page(s) : pp 22 - 47 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] biodiversité
[Termes IGN] cadre conceptuel
[Termes IGN] données localisées
[Termes IGN] données multisources
[Termes IGN] GML
[Termes IGN] interopérabilité
[Termes IGN] partage de données localisées
[Termes IGN] RDF
[Termes IGN] regroupement de données
[Termes IGN] web des données
[Termes IGN] Web Feature Service
[Termes IGN] web sémantiqueRésumé : (auteur) Diverse studies have shown that about 80% of all available data are related to a spatial location. Most of these geospatial data are available as structured and semi‐structured datasets, and often use distinct data models, are encoded using ad‐hoc vocabularies, and sometimes are being published in non‐standard formats. Hence, these data are isolated within silos and cannot be shared and integrated across organizations and communities. Spatial Data Infrastructures (SDIs) have emerged and contributed to significantly enhance data discovery and accessibility based on OGC (Open Geospatial Consortium) Web services. However, finding, accessing, and using data disseminated through SDIs are still difficult for non‐expert users. Overcoming the current geospatial data challenges involves adopting the best practices to expose, share, and integrate data on the Web, that is, Linked Data. In this article, we have developed a framework for generating, enriching, and exploiting geospatial Linked Data from multiple and heterogeneous geospatial data sources. This proposal allows connecting two interoperability universes (SDIs, more specifically Web Feature Services, WFS, and Semantic Web technologies), which is evaluated through a study case in the (geo)biodiversity domain. Numéro de notice : A2019-089 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12496 Date de publication en ligne : 28/11/2018 En ligne : https://doi.org/10.1111/tgis.12496 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92236
in Transactions in GIS > vol 23 n° 1 (February 2019) . - pp 22 - 47[article]Data linking by indirect spatial referencing systems, [report of] EuroSDR - EuroGeographics seminar, September 5th - 6th, 2018 - Paris, France / Bénédicte Bucher (2019)
Titre : Data linking by indirect spatial referencing systems, [report of] EuroSDR - EuroGeographics seminar, September 5th - 6th, 2018 - Paris, France Type de document : Actes de congrès Auteurs : Bénédicte Bucher , Auteur ; Esa Tiainen, Auteur ; Thomas Ellett von Brasch, Auteur ; Elise Acheson, Auteur ; Dominique Laurent , Auteur ; Sylvain Boissel, Auteur Editeur : Dublin : European Spatial Data Research EuroSDR Année de publication : 2019 Collection : EuroSDR Workshop report Projets : 1-Pas de projet / Conférence : EuroSDR & EuroGeographics 2018, Seminar Data Linking by Indirect Spatial Referencing Systems 05/09/2018 06/09/2018 Paris France Importance : 26 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] cohérence des données
[Termes IGN] ontologie
[Termes IGN] répertoire toponymique
[Termes IGN] toponyme
[Termes IGN] web des donnéesNote de contenu : 1 INTRODUCTION
2 PRESENTATIONS SUMMARY
2.1 Gazetteers for linking text tospace: experiences with contrasting corpora, Elise Acheson, University of Zurich
2.2 Georef - Service and Development platform:Research data pilot overview, Esa Tiainen, National Land Survey of Finland
2.3 Assessing the importance of named places: benefits and difficulties, Dominique Laurent, IGN France
2.4 Designing Data projects, how to value geographical heritage data with state of the art solutions?, Julien Homo, Kévin Darty, Foxcub
2.5 Finnish Linked Data pilots, Kai Koistinen, National Land Survey of Finland
2.6 The challenge of linking or integrating data on Buildings, Dominique Laurent, IGN France
2.7 Administrative Units as Linked Open Data – A case study from the Norwegian Mapping Authority, Thomas Ellett, Kartverket
2.8 Wikidata, a short introduction, Julien Boissel, Wikimedia foundation
2.9 Linear indirect reference systems to interconnect data in transportation applications, Alain Chaumet, ENSG-Valilab
3 COMMON FINDINGS ISSUED FROM WRAP UP SESSIONS
3.1 Need for ontologies of places and of digital assets
3.2 Consistency in an open world
3.3 Computing, maintaining and sharing links
3.4 Communities, commitments, authorities
4 CONCLUSION AND FURTHER AREAS OF RESEARCHAND DEVELOPMENTS
5 ACKNOWLEDGEMENTSNuméro de notice : 15197 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Rapport sur congrès nature-HAL : DirectOuvrColl/Actes DOI : sans En ligne : http://www.eurosdr.net/sites/default/files/uploaded_files/eurosdr_data_linking_b [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93762 Fostering the use of methods for geosimulation models sensitivity analysis and validation / Romain Reuillon (2019)
Titre : Fostering the use of methods for geosimulation models sensitivity analysis and validation Type de document : Article/Communication Auteurs : Romain Reuillon, Auteur ; Mathieu Leclaire, Auteur ; Juste Raimbault, Auteur ; Hélène Arduin, Auteur ; Paul Chapron , Auteur ; Guillaume Chérel, Auteur ; Etienne Delay, Auteur ; Pierre-François Lavallée, Auteur ; Jonathan Passerat-Palmbach, Auteur ; Pierre Peigne, Auteur ; Julien Perret , Auteur ; Sébastien Rey-Coyrehourcq, Auteur Editeur : Paris : Institut des systèmes complexes Année de publication : 2019 Conférence : ECTQG 2019, 21st European Colloquium on Theoretical and Quantitative Geography 05/09/2019 09/09/2019 Mondorf-Les-Bains Luxembourg Open Access Abstracts Langues : Anglais (eng) Descripteur : [Termes IGN] analyse de sensibilité
[Termes IGN] données localisées
[Termes IGN] estimation bayesienne
[Termes IGN] modèle de simulation
[Termes IGN] ontologie
[Termes IGN] plateforme logicielleMots-clés libres : OpenMOLE Résumé : (auteur) In recent years, there has been a significant increase in the development of methods to explore, validate, calibrate and optimize geosimulation models. These methods and tools remain, however, underused by simulation communities, despite an ever improved and easier access to high performance computation facilities. The OpenMOLE model exploration software (Reuillon et al., 2013) is one of the reliable approaches fully dedicated to promote these techniques. This presentation offers some feedback on the recent initiative of a researcher school in model validation, focused around models and practices linked to the OpenMOLE platform. We present the iterative exploration and validation protocol developed during the school, with methods of increasing refinement deployed on a toy geosimulation model (spatialized prey-predator agent-based model of a zombie infection, with multi-modeling paradigms to include diverse processes for agent behavior). First, we illustrate classical sensitivity analysis methods (stochasticity, design of experiments, global sensitivity indices), and then specific methods to study spatial configuration sensitivity, evolutionary computation methods for calibration and diversity search, and Bayesian calibration methods. They are applied on diverse specific submodels, highlighting specific mechanisms of the model, in order to answer associated thematic questions. We also illustrate the comparison with competing model ontologies by calibrating an ODE-based model on data generated by the simulation model. We finally synthesize lessons learned in the final challenge part of the school, consisting of the autonomous exploration of a new model instance by participants, including defining a thematic question and applying appropriate validation methods. This experiment both introduces a broad overview of new geosimulation model methods, and suggests ways to disseminate these into the modeling communities through similar pedagogical implementations. Numéro de notice : C2019-048 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE/INFORMATIQUE/MATHEMATIQUE Nature : Communication nature-HAL : ComSansActesPubliés-Unpublished DOI : sans En ligne : https://hal.archives-ouvertes.fr/halshs-02283730 Format de la ressource électronique : vers HAL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95760 Numérique et territoires / Philippe Cohard (2019)PermalinkPreserving Semantics, Tractability and Evolution on a multi-scale Geographic Information Infrastructure : Cases for extending INSPIRE Data Specifications / Bénédicte Bucher (2019)PermalinkSpatial decision support in urban environments using machine learning, 3D geo-visualization and semantic integration of multi-source data / Nikolaos Sideris (2019)PermalinkPermalinkThe world, the computer, and the mind : how Andrew Frank helped make human language and cognition cornerstones of geographic information science / Daniel R. Montello in International journal of geographical information science IJGIS, vol 32 n° 11-12 (November - December 2018)PermalinkOntologies pour représenter l’évolution des découpages territoriaux statistiques / Camille Bernard in Revue internationale de géomatique, vol 28 n° 4 (octobre - décembre 2018)PermalinkServices web pour l’annotation sémantique d’information spatiale à partir de corpus textuels / Ludovic Moncla in Revue internationale de géomatique, vol 28 n° 4 (octobre - décembre 2018)PermalinkVoronoi tessellation on the ellipsoidal earth for vector data / Christos Kastrisios in International journal of geographical information science IJGIS, vol 32 n° 7-8 (July - August 2018)PermalinkPermalinkThe map as knowledge base / Dalia E. Varanka in International journal of cartography, vol 4 n° 2 (June 2018)Permalink