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Assessing data completeness of VGI through an automated matching procedure for linear data / T. Koukoletsos in Transactions in GIS, vol 16 n° 4 (August 2012)
[article]
Titre : Assessing data completeness of VGI through an automated matching procedure for linear data Type de document : Article/Communication Auteurs : T. Koukoletsos, Auteur ; Muki M. Haklay, Auteur ; Claire Ellul, Auteur Année de publication : 2012 Article en page(s) : pp 477 - 498 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] analyse comparative
[Termes IGN] appariement automatique
[Termes IGN] contrainte géométrique
[Termes IGN] données localisées de référence
[Termes IGN] données localisées des bénévoles
[Termes IGN] exhaustivité des données
[Termes IGN] Grande-Bretagne
[Termes IGN] objet géographique linéaire
[Termes IGN] OpenStreetMap
[Termes IGN] programmation par contraintesRésumé : (Auteur) New, free and fast growing spatial data sources have appeared online, based on Volunteered Geographic Information (VGI). OpenStreetMap (OSM) is one of the most representative projects of this trend. Its increasing popularity and density makes the study of its data quality an imperative. A common approach is to compare OSM with a reference dataset. In such cases, data matching is necessary for the comparison to be meaningful, and is usually performed manually at the data preparation stage. This article proposes an automated feature-based matching method specifically designed for VGI, based on a multi-stage approach that combines geometric and attribute constraints. It is applied to the OSM dataset using the official data from Ordnance Survey as the reference dataset. The results are then used to evaluate data completeness of OSM in several case studies in the UK. Numéro de notice : A2012-363 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01304.x Date de publication en ligne : 03/05/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01304.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31809
in Transactions in GIS > vol 16 n° 4 (August 2012) . - pp 477 - 498[article]Exploring geomorphometry through user generated content: Comparing an unsupervised geomorphometric classification with terms attached to georeferenced images in Great Britain / C. Gschwend in Transactions in GIS, vol 16 n° 4 (August 2012)
[article]
Titre : Exploring geomorphometry through user generated content: Comparing an unsupervised geomorphometric classification with terms attached to georeferenced images in Great Britain Type de document : Article/Communication Auteurs : C. Gschwend, Auteur ; Ross S. Purves, Auteur Année de publication : 2012 Article en page(s) : pp 499 - 522 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] analyse comparative
[Termes IGN] classification non dirigée
[Termes IGN] données localisées de référence
[Termes IGN] données localisées des bénévoles
[Termes IGN] géomorphométrie
[Termes IGN] Grande-Bretagne
[Termes IGN] modèle numérique de surface
[Termes IGN] reliefRésumé : (Auteur) User generated content such as the georeferenced images and their associated tags found in Flickr provides us with opportunities to explore how the world is described in the non-scientific, everyday language used by contributors. Geomorphometry, the quantitative study of landforms, provides methods to classify Digital Elevation Models (DEMs) according to attributes such as slope and convexity. In this article we compare the terms used in Flickr and Geograph in Great Britian to describe georeferenced images to a quantitative, unsupervised classification of a DEM, using a well established method, and explore the variation of terms across geomorphometric classes and space. Anthropogenic terms are primarily associated with more gentle slopes, while terms which refer to objects such as mountains and waterfalls are typical of steeper slopes. Terms vary both across and within classes, and the source of the user generated content has an influence on the type of term used with Geograph, a collection which aims to document the geography of Great Britain, dominated by features which might be observed on a map. Numéro de notice : A2012-364 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01307.x Date de publication en ligne : 03/05/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01307.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31810
in Transactions in GIS > vol 16 n° 4 (August 2012) . - pp 499 - 522[article]Geospatial information integration for authoritative and crowd sourced road vector data / H. Du in Transactions in GIS, vol 16 n° 4 (August 2012)
[article]
Titre : Geospatial information integration for authoritative and crowd sourced road vector data Type de document : Article/Communication Auteurs : H. Du, Auteur ; Natasha Alechina, Auteur ; G. Hart, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 455 - 476 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] appariement de données localisées
[Termes IGN] conflation
[Termes IGN] données localisées de référence
[Termes IGN] données localisées des bénévoles
[Termes IGN] données routières
[Termes IGN] données vectorielles
[Termes IGN] intégration de données
[Termes IGN] ontologieRésumé : (Auteur) This article describes results from a research project undertaken to explore the technical issues associated with integrating unstructured crowd sourced data with authoritative national mapping data. The ultimate objective is to develop methodologies to ensure the feature enrichment of authoritative data, using crowd sourced data. Users increasingly find that they wish to use data from both kinds of geographic data sources. Different techniques and methodologies can be developed to solve this problem. In our previous research, a position map matching algorithm was developed for integrating authoritative and crowd sourced road vector data, and showed promising results (Anand et al. 2010). However, especially when integrating different forms of data at the feature level, these techniques are often time consuming and are more computationally intensive than other techniques available. To tackle these problems, this project aims at developing a methodology for automated conflict resolution, linking and merging of geographical information from disparate authoritative and crowd-sourced data sources. This article describes research undertaken by the authors on the design, implementation, and evaluation of algorithms and procedures for producing a coherent ontology from disparate geospatial data sources. To integrate road vector data from disparate sources, the method presented in this article first converts input data sets to ontologies, and then merges these ontologies into a new ontology. This new ontology is then checked and modified to ensure that it is consistent. The developed methodology can deal with topological and geometry inconsistency and provide more flexibility for geospatial information merging. Numéro de notice : A2012-362 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01303.x Date de publication en ligne : 03/05/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01303.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31808
in Transactions in GIS > vol 16 n° 4 (August 2012) . - pp 455 - 476[article]The annotation process in OpenStreetMap / P. Mooney in Transactions in GIS, vol 16 n° 4 (August 2012)
[article]
Titre : The annotation process in OpenStreetMap Type de document : Article/Communication Auteurs : P. Mooney, Auteur ; P. Corcoran, Auteur Année de publication : 2012 Article en page(s) : pp 561 - 579 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] analyse comparative
[Termes IGN] attribut
[Termes IGN] données localisées des bénévoles
[Termes IGN] objet géographique
[Termes IGN] ontologie
[Termes IGN] OpenStreetMapRésumé : (Auteur) In this article we describe the analysis of 25,000 objects from the OpenStreetMap (OSM) databases of Ireland, United Kingdom, Germany, and Austria. The objects are selected as exhibiting the characteristics of “heavily edited” objects. We consider “heavily edited” objects as having 15 or more versions over the object's lifetime. Our results indicate that there are some serious issues arising from the way contributors tag or annotate objects in OSM. Values assigned to the “name” and “highway” attributes are often subject to frequent and unexpected change. However, this “tag flip-flopping” is not found to be strongly correlated with increasing numbers of contributors. We also show problems with usage of the OSM ontology/controlled vocabularly. The majority of errors occurring were caused by contributors choosing values from the ontology “by hand” and spelling these values incorrectly. These issues could have a potentially detrimental effect on the quality of OSM data while at the same time damaging the perception of OSM in the GIS community. The current state of tagging and annotation in OSM is not perfect. We feel that the problems identified are a combination of the flexibility of the tagging process in OSM and the lack of a strict mechanism for checking adherence to the OSM ontology for specific core attributes. More studies related to comparing the names of features in OSM to recognized ground-truth datasets are required. Numéro de notice : A2012-366 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01306.x Date de publication en ligne : 03/05/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01306.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31812
in Transactions in GIS > vol 16 n° 4 (August 2012) . - pp 561 - 579[article]Towards usability engineering for online editors of Volunteered Geographic Information: A perspective on learnability / Catherine E. Jones in Transactions in GIS, vol 16 n° 4 (August 2012)
[article]
Titre : Towards usability engineering for online editors of Volunteered Geographic Information: A perspective on learnability Type de document : Article/Communication Auteurs : Catherine E. Jones, Auteur ; Patrick Weber, Auteur Année de publication : 2012 Article en page(s) : pp 523 - 544 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] apprentissage (cognition)
[Termes IGN] convivialité
[Termes IGN] données localisées des bénévoles
[Termes IGN] interface web
[Termes IGN] logiciel d'éditique web
[Termes IGN] OpenStreetMap
[Termes IGN] optimisation (mathématiques)
[Termes IGN] participation du publicRésumé : (Auteur) This article presents one of the first systematic usability investigations for a Volunteered Geographic Information (VGI) editor. This research is motivated by the fact that although VGI is now widely consumed, contribution rates are lagging considerably. Compared to traditional GIS interfaces, with complex interfaces resulting in high cognitive loads and barriers to participation, VGI tools and interfaces need to be easy to use and learn to encourage and facilitate contributions. This article develops a case study of OpenStreetMap, one of the most successful VGI projects, and its default editor, Potlatch2. Ten participants with no prior experience of VGI contribution, were instructed to contribute data to OSM in a structured exercise, while being monitored using an eye tracker and audio/video screen capture software. Each participant was asked to Think Aloud, i.e. describe what they were thinking and doing as they completed the tasks. The results highlight significant usability issues impacting learnability, especially from the perspective of a new contributor: hidden functionality, lack of user feedback between interactions and the inefficient and inconsistent placement of functionality and map controls. The facilitation of VGI contributions clearly depends on designing targeted interfaces, optimized to the needs of specific levels of contributors with defined goals and expectations. Numéro de notice : A2012-365 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01319.x En ligne : https://doi.org/10.1111/j.1467-9671.2012.01319.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31811
in Transactions in GIS > vol 16 n° 4 (August 2012) . - pp 523 - 544[article]Understanding design with VGI using an information relevance framework / C. Parker in Transactions in GIS, vol 16 n° 4 (August 2012)PermalinkEvaluation de la qualité des données OpenStreetMap sur la Sarthe et réflexion sur le processus de contribution / Ophélie Petit in XYZ, n° 131 (juin - août 2012)PermalinkObservation-driven geo-ontology engineering / Krzysztof Janowicz in Transactions in GIS, vol 16 n° 3 (June 2012)PermalinkThe rise of OpenStreetMap / E. Van Rees in Geoinformatics, vol 15 n° 4 (01/06/2012)PermalinkSupporting accessibility for blind and vision-impaired people with a localized gazetteer and open source geotechnology / M. Rice in Transactions in GIS, vol 16 n° 2 (April 2012)PermalinkVGI as big data: a new but delicate geographic data-source / F. Fischer in Geoinformatics, vol 15 n° 3 (01/04/2012)PermalinkUn maniement accessible à tout un chacun / T. Emery in Géomètre, n° 2090 (mars 2012)PermalinkMapping the indoor world: towards crowdsourcing geographic information about indoor spaces / M. Goetz in GIM international, vol 26 n° 3 (March 2012)PermalinkLe portail géofoncier va en rajouter une couche ! / P. Touzard in Géomètre, n° 2090 (mars 2012)PermalinkQuatre étudiants, deux vélos, une commune ... / P. Touzard in Géomètre, n° 2090 (mars 2012)PermalinkRe-centring geoinformation in secondary education: Toward a spatial citizenship approach / I. Gryl in Cartographica, vol 47 n° 1 (March 2012)PermalinkAn evaluation of internet versus paper-based methods for public participation geographic information Systems (PPGIS) / A. Pocewicz in Transactions in GIS, vol 16 n° 1 (February 2012)PermalinkMapping the world: GIM international interviews Steve Coast / Anonyme in GIM international, vol 26 n° 2 (February 2012)PermalinkPermalinkPermalinkPermalinkLe SITG fête ses vingt ans / Françoise de Blomac in SIG la lettre, n° 129 (septembre 2011)PermalinkDiscovery and integration of Web 2.0 content into Geospatial Information Infrastructures : a use case in wild fire monitoring / M. Nunez-Redo (22/08/2011)Permalinkvol 25 n° 8-9 - august - september 2011 - Data-Intensive Geospatial Computing (Bulletin de International journal of geographical information science IJGIS) / Jiang BinPermalinkMatching INSPIRE quality of service requirements with hybrid clouds / B. Baranski in Transactions in GIS, vol 15 supplement s1 (July 2011)Permalink