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Relation modelling within multiple representation databases and generalisation services / Dirk Burghardt in Cartographic journal (the), vol 47 n° 3 (August 2010)  

Public [article]  inCartographic journal (the) > vol 47 n° 3 (August 2010) . - pp 238 - 249 Titre : Relation modelling within multiple representation databases and generalisation services Type de document : Article/Communication Auteurs : Dirk Burghardt, Auteur ; I. Petzold, Auteur ; M. Bobzien, Auteur Année de publication : 2010 Article en page(s) : pp 238 - 249 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] architecture orientée services [Termes IGN] carte topographique [Termes IGN] généralisation automatique de données [Termes IGN] modèle relationnel [Termes IGN] représentation multiple [Termes IGN] système d'information géographique [Vedettes matières IGN] Généralisation Résumé : (Auteur) The process of topographic map production at the national mapping agencies is undergoing steady change. The pressure to reduce production cost in particular hassled to the development and use of new approaches. Traditionally, separate datasets and models have been used to produce topographic maps of different scales and even the sources of data often differ. As a consequence, the derived datasets on different scales are usually inconsistent and thus cannot be updated in a common process. With the transition to GIS-based cartography, these disadvantages will be overcome. The research and development presented here have been carried out within an application-oriented research project of the University of Zurich in cooperation with the company Axes Systems. The focus has been on improving automated generalisation for topographic map production. A multiple representation database with extended linkage information was first implemented. These so-called vertical relations enable the storage of meta-information, which is needed to make the generalisations used during incremental updates. Second, a data model of horizontal relations was developed, to model contextual information explicitly. Examples of applications are the subdivision and partition of datasets, and the modelling of feature groups. Third, a service-oriented architecture was established, enabling a platform-independent development and the provision of generalisation functionality. In addition, an embedded workflow management system was introduced, consisting of a workflow editor and workflow engine, to support the interactive configuration of the generalisation process and the automated execution of generalisation services. Numéro de notice : A2010-470 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870410X12699418769035 Date de publication en ligne : 18/07/2013 En ligne : https://doi.org/10.1179/000870410X12699418769035 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30663 [article]

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Multi-representation databases with explicitly modeled horizontal, vertical, and update relations / M. Bobzien in Cartography and Geographic Information Science, vol 35 n° 1 (January 2008)  

Public [article]  inCartography and Geographic Information Science > vol 35 n° 1 (January 2008) . - pp 3 - 16 Titre : Multi-representation databases with explicitly modeled horizontal, vertical, and update relations Type de document : Article/Communication Auteurs : M. Bobzien, Auteur ; Dirk Burghardt, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 3 - 16 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] données vectorielles [Termes IGN] généralisation automatique de données [Termes IGN] mise à jour de base de données [Termes IGN] modèle conceptuel de données localisées [Termes IGN] représentation multiple Résumé : (Auteur) This paper presents a new approach to combining multi-representation databases with the generalization and update processes. It leads to a tightly integrated model which is a part of the existing cartographic GIS expand. The approach is based on the mathematical concept of relations and, in particular, on three different types of relations: horizontal (within one resolution), vertical (between different resolutions), and update. Horizontal relations allow the representation of relationships between features within one resolution. Examples are partitions, neighborhoods, and topology. The vertical relation represents the relationship between features of different resolutions. This originates from a generalization or matching process. The update relation describes temporal changes of features. After a detailed theory about the relation types introduced, the paper continues with a discussion of their similarities and differences, with a focus on implementation in a multi-representation database. A prototype demonstrates the generalization of buildings and roads from vector data at 1: 25,000 to 1: 50,000 scales. The paper ends with conclusions and an outlook on further research tasks. Copyright CaGISociety Numéro de notice : A2008-061 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304008783475698 En ligne : https://doi.org/10.1559/152304008783475698 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29056 [article]

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