Descripteur
Documents disponibles dans cette catégorie (2504)
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
A review of volunteered geographic information quality assessment methods / Hansi Senaratne in International journal of geographical information science IJGIS, vol 31 n° 1-2 (January - February 2017)
[article]
Titre : A review of volunteered geographic information quality assessment methods Type de document : Article/Communication Auteurs : Hansi Senaratne, Auteur ; Amin Mobasheri, Auteur ; Ahmed Loai Ali, Auteur ; et al., Auteur Année de publication : 2017 Article en page(s) : pp 139 - 167 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] acquisition de données
[Termes IGN] données localisées des bénévoles
[Termes IGN] exploration de données géographiques
[Termes IGN] qualité des donnéesRésumé : (auteur) With the ubiquity of advanced web technologies and location-sensing hand held devices, citizens regardless of their knowledge or expertise, are able to produce spatial information. This phenomenon is known as volunteered geographic information (VGI). During the past decade VGI has been used as a data source supporting a wide range of services, such as environmental monitoring, events reporting, human movement analysis, disaster management, etc. However, these volunteer-contributed data also come with varying quality. Reasons for this are: data is produced by heterogeneous contributors, using various technologies and tools, having different level of details and precision, serving heterogeneous purposes, and a lack of gatekeepers. Crowd-sourcing, social, and geographic approaches have been proposed and later followed to develop appropriate methods to assess the quality measures and indicators of VGI. In this article, we review various quality measures and indicators for selected types of VGI and existing quality assessment methods. As an outcome, the article presents a classification of VGI with current methods utilized to assess the quality of selected types of VGI. Through these findings, we introduce data mining as an additional approach for quality handling in VGI. Numéro de notice : A2017-030 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2016.1189556 En ligne : http://dx.doi.org/10.1080/13658816.2016.1189556 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84023
in International journal of geographical information science IJGIS > vol 31 n° 1-2 (January - February 2017) . - pp 139 - 167[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-2017011 RAB Revue Centre de documentation En réserve L003 Disponible 079-2017012 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Social networks with rich edge semantics Type de document : Monographie Auteurs : Quan Zheng, Auteur ; David Skillicorn, Auteur Editeur : Boca Raton, New York, ... : CRC Press Année de publication : 2017 Importance : 230 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-1-315-39062-8 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Société de l'information
[Termes IGN] intégration de données
[Termes IGN] modèle relationnel
[Termes IGN] modélisation sémantique
[Termes IGN] réseau social
[Termes IGN] réseautage social
[Termes IGN] science des donnéesRésumé : (éditeur) Social Networks with Rich Edge Semantics introduces a new mechanism for representing social networks in which pairwise relationships can be drawn from a range of realistic possibilities, including different types of relationships, different strengths in the directions of a pair, positive and negative relationships, and relationships whose intensities change with time. For each possibility, the book shows how to model the social network using spectral embedding. It also shows how to compose the techniques so that multiple edge semantics can be modeled together, and the modeling techniques are then applied to a range of datasets.
Features:
- Introduces the reader to difficulties with current social network analysis, and the need for richer representations of relationships among nodes, including accounting for intensity, direction, type, positive/negative, and changing intensities over time
- Presents a novel mechanism to allow social networks with qualitatively different kinds of relationships to be described and analyzed
- Includes extensions to the important technique of spectral embedding, shows that they are mathematically well motivated and proves that their results are appropriate
- Shows how to exploit embeddings to understand structures within social networks, including subgroups, positional significance, link or edge prediction, consistency of role in different contexts, and net flow of properties through a node
- Illustrates the use of the approach for real-world problems for online social networks, criminal and drug smuggling networks, and networks where the nodes are themselves groups
Suitable for researchers and students in social network research, data science, statistical learning, and related areas, this book will help to provide a deeper understanding of real-world social networks.Note de contenu : 1- Introduction
2- The core model
3- Background
4- Modelling relationships of different types
5- Modelling asymmetric relationships
6- Modelling asymmetric relationships with multiple types
7- Modelling relationships that change over time
8- Modelling positive and negative relationships
9- Signed graph-based semi-supervised learning
10- Combining directed and signed embeddings
11- SummaryNuméro de notice : 25843 Affiliation des auteurs : non IGN Thématique : SOCIETE NUMERIQUE Nature : Monographie En ligne : https://www.taylorfrancis.com/books/9781315390628 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95250
Titre : Synthèse [de la] journée d’information et d’échanges « Copernicus » Type de document : Article/Communication Auteurs : Anonyme, Auteur Editeur : Paris [France] : Centre national de l'information géographique CNIG Année de publication : 2017 Conférence : Journée 2017 Copernicus - Kopernikus 30/03/2017 30/03/2017 Champs-sur-Marne France Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] données Copernicus
[Termes IGN] données satellitaires
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] INSPIRE
[Termes IGN] occupation du sol
[Termes IGN] surveillanceNuméro de notice : C2017-002 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComSansActesPubliés-Unpublished DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84674 Documents numériques
en open access
C2017-002_Synthèse journée d’information et d’échanges « Copernicus »Adobe Acrobat PDF The location swapping method for geomasking / Su Zhang in Cartography and Geographic Information Science, Vol 44 n° 1 (January 2017)
[article]
Titre : The location swapping method for geomasking Type de document : Article/Communication Auteurs : Su Zhang, Auteur ; Scott M. Freundschuh, Auteur ; Kate Lenzer, Auteur ; Paul A. Zandbergen, Auteur Année de publication : 2017 Article en page(s) : pp 22 - 34 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] accès aux données localisées
[Termes IGN] ArcGIS
[Termes IGN] carte à puce
[Termes IGN] données médicales
[Termes IGN] échange de données informatisé
[Termes IGN] géocodage inverse
[Termes IGN] masque géographique
[Termes IGN] protection de la vie privéeRésumé : (auteur) When locations of individual-level health data are released in the form of published maps, the identity of these individuals could be identified through reverse geocoding. Spatial data can, therefore, not be released unless the locations have been modified, for example, using aggregation or geographic masking. Geographic masking techniques apply translation or perturbations to decrease the likelihood of re-identification of individuals through reverse geocoding. The current study proposes a new geographic masking technique referred to as “location swapping.” Location swapping replaces an original location with a masked location selected from all possible locations with similar geographic characteristics within a specified neighborhood. Strengths and weaknesses of location swapping will be discussed relative to existing geographic masking techniques. The approach will be illustrated using several example data sets and a custom toolset developed for ArcGIS to automate the location swapping algorithm. Numéro de notice : A2017-099 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2015.1095655 En ligne : https://doi.org/10.1080/15230406.2015.1095655 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84478
in Cartography and Geographic Information Science > Vol 44 n° 1 (January 2017) . - pp 22 - 34[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-2017011 RAB Revue Centre de documentation En réserve L003 Disponible Volunteered geographic information and the future of geospatial data / Claudio Elizio Calazans Campelo (2017)
Titre : Volunteered geographic information and the future of geospatial data Type de document : Monographie Auteurs : Claudio Elizio Calazans Campelo, Éditeur scientifique ; Michela Bertolotto, Éditeur scientifique ; Padraig Corcoran, Éditeur scientifique Editeur : Hershey [USA] : IGI Global Année de publication : 2017 Collection : Advances in Geospatial Technologies (AGT) Book Series, ISSN 2327-5715 Importance : 357 p. Format : 22 x 29 cm ISBN/ISSN/EAN : 978-1-5225-2446-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] cartographie collaborative
[Termes IGN] données localisées des bénévoles
[Termes IGN] qualité des donnéesIndex. décimale : 37.50 Géomatique web Résumé : (Editeur) Geographic data is a valuable source of information in modern society. By utilizing alternative sources of this data, the availability and potential applications of geographic information systems can be increased. This book is a pivotal reference source for the latest scholarly research on information gathering from volunteers, as opposed to official agencies and private companies, to compile geospatial data. Highlighting a range of pertinent topics such as regional landscape mapping, road safety, and land usage, this book is ideally designed for researchers, academics, students, professionals, and practitioners interested in the growing area of volunteered geographic information. Note de contenu : Chapter 1 - Engaging With the Participatory Geoweb: Experiential Learning From Practice / Jon M. Corbett, Logan Cochrane
Chapter 2 - Quality Evaluation of Volunteered Geographic Information: The Case of OpenStreetMap / Hongyu Zhang, Jacek Malczewski
Chapter 3 - Traditional vs. Machine-Learning Techniques for OSM Quality Assessment / Musfira Jilani, Michela Bertolotto, Padraig Corcoran, Amerah Alghanim
Chapter 4 - VGI in the Geoweb: An Experiment to Test Data Reliability / Michael Buzzelli, David Brown, Kenwoo Lee, Justin Mullan
Chapter 5 - Quality Assessment of Volunteered Geographic Information for Educational Planning / Hafiz Muhammad Muzaffar, Ali Tahir, Asmat Ali, Munir Ahmad, Gavin McArdle
Chapter 6 - Emotional and Subjective Volunteered Geographical Information / Jiri Panek
Chapter 7 - Using OpenStreetMap to Create Land Use and Land Cover Maps: Development of an Application / Cidália Costa Fonte, Joaquim António Patriarca, Marco Minghini, Vyron Antoniou, Linda See, Maria Antonia Brovelli
Chapter 8 - Mapping Regional Landscape by Using OpenstreetMap (OSM): A Case Study to Understand Forest Patterns in Maya Zone, Mexico / Di Yang
Chapter 9 - Leveraging Volunteered Geographic Information to Improve Disaster Resilience: Lessons Learned From AGORA and Future Research Directions / João Porto de Albuquerque, Flávio Eduardo Aoki Horita, Livia Castro Degrossi, Roberto dos Santos Rocha, Sidgley Camargo de Andrade, Camilo Restrepo-Estrada, Werner Leyh
Chapter 10 - Quality of Urban Life Index From Location-Based Social Networks Data: A Case Study in Belo Horizonte, Brazil / Rodrigo Smarzaro, Tiago França Melo de Lima, Clodoveu Augusto Davis Jr.
Chapter 11 - Improving Accessibility Through VGI and Crowdsourcing / Igor Gomes Cruz, Claudio E.C. Campelo
Chapter 12 - Gathering Road Safety Critical Information From Users / Ahmet Yıldız
Chapter 13 - Generation of a Data Model for Indoor Navigation Based on Volunteered Geospatial Information (VGI) / Rahim Ali Abbaspour, Simin S. Mirvahabi
Chapter 14 - Adaptive Acquisition of VGI to Fill Out Gaps in Biological Observation Metadata / Daniel Cintra Cugler, Claudia Bauzer Medeiros
Chapter 15 - Geospatial Digital Rights Management: Challenge to Global Spatial Data Infrastructure / Titus M. Ng'ang'a, Peter M. Wachira, Tim J. L. Wango, Joseph M. Ndung'u, Margaret N. NdungoNuméro de notice : 22767 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86708 Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 22767-01 37.50 Livre Centre de documentation Géomatique Disponible 3D change detection – Approaches and applications / Rongjun Qin in ISPRS Journal of photogrammetry and remote sensing, vol 122 (December 2016)PermalinkAn attempt to determine the effect of increase of observation correlations on detectability and identifiability of a single gross error / Witold Proszynski in Geodesy and cartography, vol 65 n° 2 (December 2016)PermalinkEstimates of stem wood increments in forest resources: comparison of different approaches in forest inventory: consequences for international reporting: case study of European forests / Andrius Kuliesis in Annals of Forest Science, vol 73 n° 4 (December 2016)PermalinkBounding the integer bootstrapped GNSS baseline’s tail probability in the presence of stochastic uncertainty / Steven E. Langel in Journal of geodesy, vol 90 n° 11 (November 2016)PermalinkThe limits of free / Alistair Maclenan in GEO: Geoconnexion international, vol 15 n° 10 (November - December 2016)PermalinkTowards a protocol for the collection of VGI vector data / Peter Mooney in ISPRS International journal of geo-information, vol 5 n° 11 (November 2016)PermalinkEtalab booste la géo / Françoise de Blomac in DécryptaGéo le mag, n° 180 (octobre 2016)PermalinkFast and accurate target detection based on multiscale saliency and active contour model for high-resolution SAR images / Song Tu in IEEE Transactions on geoscience and remote sensing, vol 54 n° 10 (October 2016)PermalinkLes forêts, une affaire de professionnels / Michel Padel in Géomètre, n° 2140 (octobre 2016)PermalinkGreen shoots / Roger Longhorn in GEO: Geoconnexion international, vol 15 n° 9 (October 2016)Permalink