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Quality assessment of the French OpenStreetMap dataset / Jean-François Girres in Transactions in GIS, vol 14 n° 4 (August 2010)  

Public [article]  inTransactions in GIS > vol 14 n° 4 (August 2010) . - pp 435 - 459 Titre : Quality assessment of the French OpenStreetMap dataset Type de document : Article/Communication Auteurs : Jean-François Girres , Auteur ; Guillaume Touya , Auteur Année de publication : 2010 Article en page(s) : pp 435 - 459 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] base de données routières [Termes IGN] données localisées des bénévoles [Termes IGN] données localisées libres [Termes IGN] France (administrative) [Termes IGN] géomatique web [Termes IGN] OpenStreetMap [Termes IGN] participation du public [Termes IGN] production participative [Termes IGN] qualité des données Résumé : (Auteur) The concept of Volunteered Geographic Information (VGI) has recently emerged from the new Web 2.0 technologies. The OpenStreetMap project is currently the most significant example of a system based on VGI. It aims at producing free vector geographic databases using contributions from Internet users. Spatial data quality becomes a key consideration in this context of freely downloadable geographic databases. This article studies the quality of French OpenStreetMap data. It extends the work of Haklay to France, provides a larger set of spatial data quality element assessments (i.e. geometric, attribute, semantic and temporal accuracy, logical consistency, completeness, lineage, and usage), and uses different methods of quality control. The outcome of the study raises questions such as the heterogeneity of processes, scales of production, and the compliance to standardized and accepted specifications. In order to improve data quality, a balance has to be struck between the contributors' freedom and their respect of specifications. The development of appropriate solutions to provide this balance is an important research issue in the domain of user-generated content. Numéro de notice : A2010-454 Affiliation des auteurs : COGIT (1988-2011) Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2010.01203.x Date de publication en ligne : 21/10/2010 En ligne : https://doi.org/10.1111/j.1467-9671.2010.01203.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30647 [article]

Digital urban morphometrics : Automatic extraction and assessment of morphological properties of buildings / Claudio Carneiro in Transactions in GIS, vol 14 n° 4 (August 2010)  

Public [article]  inTransactions in GIS > vol 14 n° 4 (August 2010) . - pp 497 - 531 Titre : Digital urban morphometrics : Automatic extraction and assessment of morphological properties of buildings Type de document : Article/Communication Auteurs : Claudio Carneiro, Auteur ; Eugenio Morello, Auteur ; Thomas Voegtle, Auteur ; François Golay, Auteur Année de publication : 2010 Article en page(s) : pp 497 - 531 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] base de données localisées [Termes IGN] données lidar [Termes IGN] extraction automatique [Termes IGN] Genève [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] morphologie urbaine Résumé : (Auteur) The aim of this article is to present a method to calculate the morphological properties of the built environment using LiDAR (light detection and ranging) data, geographic information systems (GIS) data and three-dimensional (3D) models of cities as a source of information. A hybrid approach that takes into account different types of inputs and consequently evaluates the accuracy of each type of used data is presented. This work is intended to give a first response to the lack of a comprehensive and accurate procedure that uses LiDAR data in order to automatically derive precise morphological properties, such as volumes and surfaces (façades and roofs) of buildings. The method was tested on two case-study areas in the Geneva region with different characteristics, one in the old town along the Rhone River and the other on the CERN campus. A statistical analysis that compares the results of the computation with the 3D model of the built environment was used to validate the results, complemented by significance statistical tests. Outcomes showed that the proposed method to derive morphological properties can reach high levels of accuracy, thus enhancing the potential uses of LiDAR data for numerous applications, typically for the assessment of the urban environmental quality (UEQ) at the city and district scale, such as the estimation of the potential deployment of renewable energies in the built environment and the determination and monitoring of several urban indicators. Numéro de notice : A2010-455 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2010.01218.x Date de publication en ligne : 21/10/2010 En ligne : https://doi.org/10.1111/j.1467-9671.2010.01218.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30648 [article]