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scientifique

GNSS metadata and data validation in the EUREF Permanent Network / Carine Bruyninx in GPS solutions, vol 23 n° 4 (October 2019)  

Public [article]  inGPS solutions > vol 23 n° 4 (October 2019) Titre : GNSS metadata and data validation in the EUREF Permanent Network Type de document : Article/Communication Auteurs : Carine Bruyninx, Auteur ; Juliette Legrand, Auteur ; András Fabian, Auteur ; Eric Pottiaux, Auteur Année de publication : 2019 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] métadonnées géographiques [Termes IGN] qualité des metadonnées [Termes IGN] récepteur GNSS [Termes IGN] réseau permanent EUREF [Termes IGN] station GNSS [Termes IGN] validation des données Résumé : (Auteur) The EUREF Permanent Network (EPN) is a network of continuously operating GNSS stations installed throughout the European continent. The EPN Central Bureau (CB) performs the day-to-day EPN coordination, acts as liaison between station operators, data centers, and analysis centers, and maintains the EPN Information System. Over the last years, the EPN CB has accommodated the enhancements required by the new EU General Data Protection Regulation, new multi-GNSS signals, new RINEX formats, increased usage of real-time GNSS data, and the new GeodesyML metadata exchange format. We will discuss how the EPN CB validates and provides access to EPN station metadata and monitors EPN data sets in terms of availability, latency, and quality to ensure they meet the user requirements. The analysis of 23 years of EPN GNSS data quality checks demonstrates some of the most frequently encountered tracking problems affecting EPN stations, and specific GNSS receiver types, throughout the years. Numéro de notice : A2019-332 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s10291-019-0880-9 Date de publication en ligne : 02/08/2019 En ligne : https://doi.org/10.1007/s10291-019-0880-9 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93420 [article]

A method for checking the quality of geographic metadata based on ISO 19157 / Manuel A. Ureña-Cámara in International journal of geographical information science IJGIS, Vol 33 n° 1-2 (January - February 2019)  

Public [article]  inInternational journal of geographical information science IJGIS > Vol 33 n° 1-2 (January - February 2019) . - pp 1 - 27 Titre : A method for checking the quality of geographic metadata based on ISO 19157 Type de document : Article/Communication Auteurs : Manuel A. Ureña-Cámara, Auteur ; Javier Nogueras-Iso, Auteur ; Javier Lacasta, Auteur ; Francisco Javier Ariza-López, Auteur Année de publication : 2019 Article en page(s) : pp 1 - 27 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] contrôle qualité automatique [Termes IGN] hétérogénéité sémantique [Termes IGN] interopérabilité [Termes IGN] Java (langage de programmation) [Termes IGN] métadonnées géographiques [Termes IGN] norme ISO [Termes IGN] qualité des metadonnées [Termes IGN] XML Résumé : (auteur) With recent advances in remote sensing, location-based services and other related technologies, the production of geospatial information has exponentially increased in the last decades. Furthermore, to facilitate discovery and efficient access to such information, spatial data infrastructures were promoted and standardized, with a consideration that metadata are essential to describing data and services. Standardization bodies such as the International Organization for Standardization have defined well-known metadata models such as ISO 19115. However, current metadata assets exhibit heterogeneous quality levels because they are created by different producers with different perspectives. To address quality-related concerns, several initiatives attempted to define a common framework and test the suitability of metadata through automatic controls. Nevertheless, these controls are focused on interoperability by testing the format of metadata and a set of controlled elements. In this paper, we propose a methodology of testing the quality of metadata by considering aspects other than interoperability. The proposal adapts ISO 19157 to the metadata case and has been applied to a corpus of the Spanish Spatial Data Infrastructure. The results demonstrate that our quality check helps determine different types of errors for all metadata elements and can be almost completely automated to enhance the significance of metadata. Numéro de notice : A2019-018 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2018.1515437 Date de publication en ligne : 17/09/2018 En ligne : https://doi.org/10.1080/13658816.2018.1515437 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91675 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2019011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A novel computational knowledge-base framework for visualization and quantification of geospatial metadata in spatial data infrastructures / Gangothri Rajaram in Geoinformatica, vol 22 n° 2 (April 2018)  

Public [article]  inGeoinformatica > vol 22 n° 2 (April 2018) . - pp 269 - 305 Titre : A novel computational knowledge-base framework for visualization and quantification of geospatial metadata in spatial data infrastructures Type de document : Article/Communication Auteurs : Gangothri Rajaram, Auteur ; Harish Chandra Karnatak, Auteur ; Swaminathan Venkatraman, Auteur ; et al., Auteur Année de publication : 2018 Article en page(s) : pp 269 - 305 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] cadre conceptuel [Termes IGN] métadonnées [Termes IGN] métadonnées géographiques [Termes IGN] pondération [Termes IGN] qualité des metadonnées [Termes IGN] service web Résumé : (Auteur) Advances in Metadata research have been instrumental in predictions and `fitness-of-use evaluation' for the effective Decision-making process. For the past two decades, the model has been developed to provide visual assistance for assessing the quality information in metadata and quantifying the degree of metadata population. Still, there is a need to develop a framework that can be generic to adopt all the standards available for Geospatial Metadata. The computational analysis of metadata for specific applications remains uncharted for investigations and studies. This work proposes a computational framework for Geospatial Metadata by integrating TopicMaps and Hypergraphs (HXTM) based on the elements and their dependency relationships. A purpose-built dataset extracted from schemas of various standardisation organisations and existing knowledge in the discipline is utilised to model the framework and thereby evaluate ranking strategies. Hypergraph-Helly Property based Weight-Assignment Algorithm (HHWA) have been proposed for HXTM framework to calculate Stable weights for Metadata Elements. Recursive use of Helly-property ensures predominant elements, while Rank Order Centroid (ROC) method is used to compute standard weights. A real corpus using case studies from FGDC's Standard for Geospatial Metadata, INSPIRE Metadata Standards, and ISRO Metadata Content Standard (NSDI 2.0) is used to validate the proposed framework. The observations show that the Information Gain (Entropy) of the proposed model along with the algorithm proves to be computationally smart for quantification purposes and visualises the strength of Metadata Elements for all applications. A prototype tool, `MetDEVViz- MetaData Editor, Validator &Visualization' is designed to exploit the benefits of the proposed algorithm for the case studies that acts as a web service to provide a user interface for editing, validating and visualizing metadata elements. Numéro de notice : A2018-365 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s10707-018-0317-6 Date de publication en ligne : 28/02/2018 En ligne : https://doi.org/10.1007/s10707-018-0317-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90730 [article]

Proceedings of the International Symposium on Spatial Data Quality '99, ISSDQ 1999, 18th to 20th March 1999, The Hong Kong Polytechnic University, Hong Kong / Wenzhong Shi (1999)

Public Titre : Proceedings of the International Symposium on Spatial Data Quality '99, ISSDQ 1999, 18th to 20th March 1999, The Hong Kong Polytechnic University, Hong Kong Type de document : Actes de congrès Auteurs : Wenzhong Shi, Éditeur scientifique ; Michael F. Goodchild, Éditeur scientifique ; Peter F. Fisher, Éditeur scientifique Editeur : Hong Kong [China] : The Hong Kong Polytechnic University Année de publication : 1999 Conférence : ISSDQ 1999, 1st International Symposium on Spatial Data Quality 18/07/1999 20/07/1999 Hong-Kong Hong-Kong Importance : 628 p. Format : 17 x 25 cm ISBN/ISSN/EAN : 978-962-367-253-5 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] analyse d'image numérique [Termes IGN] base de données localisées [Termes IGN] contrôle qualité [Termes IGN] incertitude des données [Termes IGN] incertitude géométrique [Termes IGN] modèle numérique de surface [Termes IGN] qualité des données [Termes IGN] qualité des metadonnées Index. décimale : CG1999 Actes de congrès en 1999 Note de contenu : 1- Error in registration and matching 2- Communicating uncertaintly and resolution 3- Spatial data quality control 4- Quality management 5- Accuracy of DEM 6- Visualization of uncertainty 7- Positionnal error models 8- Reporting Spatial data quality 9- Errors in thematic data 10- Errors in forest applications 11- Model spatial objects with uncertainty 12- Uncertainty in spatial analysis 13- Reasoning & decision making with uncertainty 14- Uncertainty in image analysis 15- Pre-symposium workshops 16- Panel discussion Numéro de notice : 24663 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Actes DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92369

Contient

• Geometrical matching of polygons in GISs and assessment of geometrical quality of polygons / Atef Bel Hadj Ali (1999) 
• A practical study on precision and resolution in vector geographical databases / François Vauglin (1999) 
• Quality management, data quality and users metadata for geographical information / Laure Dassonville (1999)

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24663-01	CG.99	Livre	Centre de documentation	Congrès	Disponible

Quality management, data quality and users metadata for geographical information / Laure Dassonville (1999)

Public contenu dans Proceedings of the International Symposium on Spatial Data Quality '99, ISSDQ 1999, 18th to 20th March 1999, The Hong Kong Polytechnic University, Hong Kong / Wenzhong Shi (1999) Titre : Quality management, data quality and users metadata for geographical information Type de document : Article/Communication Auteurs : Laure Dassonville, Auteur Editeur : Hong Kong [China] : The Hong Kong Polytechnic University Année de publication : 1999 Conférence : ISSDQ 1999, 1st International Symposium on Spatial Data Quality 18/07/1999 20/07/1999 Hong-Kong Hong-Kong Importance : pp 130 - 143 Format : 17 x 25 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] Comité européen des responsables de la cartographie officielle [Termes IGN] gestion de la qualité [Termes IGN] norme ISO 9000 [Termes IGN] qualité des données [Termes IGN] qualité des metadonnées Résumé : (auteur) CERCO (Comite Europeen des Responsables de la Cartographie Officielle) gathers participants from European National Mapping Agencies. It has created several working groups for exchanging information and for discussing geographical information issues. One of them, the Working Group on Quality was created in September 1997 and is working on three main subjects: "Quality management and ISO 9000", "Data quality issues" and "Standards". This paper presents elements which have been given to the questions raised up to now and emphasizes common and different points of view of the National Map Agencies. The first subject consists of analysing the opportunity to implement ISO 9000 for National Map Agencies. A questionnaire has been written and this paper presents the results. The second subject aims to share experience about geographical data quality during the entire life cycle of a product such as cadastre, topographic products or orthophotography. A lot of topics raised: methodologies for identifying users requirements or processes to evaluate the fitness for use. The point is to identify relevant questions among all these issues. The third subject concerns experience in applying the two CEN/TC 287 standards: Metadata and Quality. Metadata standards give very useful common structures for geographical dataset description. This group decided to focus on a subset of the most comprehensive standards at a level named "core-metadata", presented in this paper. Numéro de notice : C1999-072 Affiliation des auteurs : IGN (1940-2011) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92372