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Titre : Managing generalisation updates in IGN map production Type de document : Chapitre/Contribution Auteurs : François Lecordix , Auteur ; Cécile Lemarié
, Auteur
Editeur : Amsterdam [Pays Bas] : Elsevier Année de publication : 01/01/2007 Importance : 16 p. ; pp 285 - 300 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] 1:100.000
[Termes IGN] base de données cartographiques
[Termes IGN] base de données dérivée
[Termes IGN] BD TOP 100
[Termes IGN] conflit d'espace
[Termes IGN] généralisation de réseaux
[Termes IGN] Institut géographique national (France)
[Termes IGN] mise à jour de base de données
[Termes IGN] propagation amortie des déplacements
[Termes IGN] réseau routier
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) This chapter reviews practical experience gained from the application of generalisation tech-nologies in the production environment of the French National Mapping Agency (IGN). Two main stages in production that require generalisation solutions are presented. The first step con-cerns the process of creating from a geographic database a first version of a cartographic database in which generalisation conflicts have been solved. This allows us to print a first map edition. This complex derivation step is made only once for a map which will be published over many years after updating. The second step focuses on the repetitive process to propagate updating in a cartographic database in order to provide new map editions with a less expensive solution than via a new derivation process. In this chapter, generalisation solutions to produce a 1 : 100000 topo-graphic map series are presented in detail and illustrated with a number of examples illustrating road generalisation. These solutions come from different research projects on generalisation. The benefits of such new solutions are discussed. Numéro de notice : H2007-004 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : GEOMATIQUE/INFORMATIQUE Nature : Chapître / contribution Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65896 Outflow preservation of the hydrographic network on the relief in map generalisation / Julien Gaffuri (2007)
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Titre : Outflow preservation of the hydrographic network on the relief in map generalisation Type de document : Article/Communication Auteurs : Julien Gaffuri , Auteur
Editeur : Paris : Institut Géographique National - IGN (1940-2007) Année de publication : 2007 Conférence : ICC 2007, 23rd International Cartographic Conference ICA 04/08/2007 10/08/2007 Moscou Russie OA Proceedings Importance : 12 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] écoulement des eaux
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] réseau hydrographique
[Vedettes matières IGN] GénéralisationRésumé : (auteur) [introduction] In most GIS softwares, geographical data are often stored and managed using a set of independent layers. Many important relationships existing between objects of these layers are not explicit and can therefore be broken by some treatments on the data (such as generalisation) and create inconsistencies. In this paper, we focus on the relationship existing between relief and hydrographic network. This relationship is particularly important: in the real world, the hydrographic network flows down on the relief. Many rivers are located inside deep thalwegs, which have been hollowed out by the rivers themselves. The geographic data representing the relief and the hydrographic network should therefore respect this outflow relationship. This relationship is sometimes not respected in geographic datasets. A cause of this inconstancy is that the elevation and hydrographic data are often collected separately (with different acquisition processes and levels of detail) without taking into account this relationship. An other cause is the use of some treatments on either the relief or the hydrographic network or even both, which can alter the outflow relationship. For example, in map generalisation, hydrographic sections are often displaced in order to avoid an overlapping with other objects, such as a road parallel to a river. As a consequence, the outflow relationship between hydrographic sections and the relief can be broken. Our goal is to give a method to correct these inconsistencies Numéro de notice : C2007-052 Affiliation des auteurs : COGIT (1988-2011) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://icaci.org/files/documents/ICC_proceedings/ICC2007/documents/doc/THEME%20 [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102595 Documents numériques
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Outflow preservation ... - pdf auteurAdobe Acrobat PDFA prototype generalisation system based on the multi-agent system paradigm / Cécile Duchêne (01/01/2007)
Titre : A prototype generalisation system based on the multi-agent system paradigm Type de document : Chapitre/Contribution Auteurs : Cécile Duchêne , Auteur ; Anne Ruas
, Auteur
Editeur : Amsterdam [Pays Bas] : Elsevier Année de publication : 01/01/2007 Importance : pp 269 - 284 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] AGENT
[Termes IGN] CartACom
[Termes IGN] meso échelle
[Termes IGN] programmation par contraintes
[Termes IGN] système multi-agentsRésumé : (Auteur) Automation of the generalisation process is one of the main research subjects of the COGIT laboratory. The automation of this process is a real challenge for a NMA that in the short term wishes to reduce costs and time taken to produce series mapping, and in the longer term wants to be able to deliver maps over the internet, providing generalisation on demand. Research in this area, undertaken at the COGIT laboratory has resulted in the1 award of nine PhDs and a further two that are ongoing. This chapter presents various results with a particular focus on two generalisation engines conceived at the COGIT laboratory and based on the Multi-Agent System paradigm. The first one is based on the concept of constraints, ideas of autonomy and levels of details. It models the micro- and meso-generalisation of roads and urban areas. This model has been reused during the Agent project and has been commercialised in the form of "Clarity" -a Laser-Scan product. The other engine is based on interactions between micro-agents and has been optimised for the generalisation of rural areas. This recent development has produced some promising results. Work is ongoing to develop linkages between the two models. Numéro de notice : H2007-003 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : GEOMATIQUE/INFORMATIQUE Nature : Chapître / contribution Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65895
Titre : River network selection based on structure and pattern recognition Type de document : Article/Communication Auteurs : Guillaume Touya , Auteur
Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2007 Conférence : ICC 2007, 23rd International Cartographic Conference ICA 04/08/2007 10/08/2007 Moscou Russie OA Proceedings Importance : 17 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] continuité cartographique
[Termes IGN] modèle (conceptuel) de généralisation
[Termes IGN] reconnaissance de formes
[Termes IGN] réseau hydrographique
[Vedettes matières IGN] GénéralisationRésumé : (auteur) [introduction] Generalisation aims at reducing the level of detail of a database in order to meet new specifications. A lot of work have dealt with automated generalisation for many years. Most of them concerned cartographic generalisation that aims at producing maps but this paper focuses on purely database (or model) generalisation. This paper addresses a specific and important problem of database generalisation, the generalisation of river network data. The paper emphasizes on the problem of selection: which stream is important enough to be part of the generalized dataset? River network selection has already been treated in the past by [12,9]. The solution presented here particularly employs the principle of "good continuation" to enrich the database with "river strokes". The second part of the paper presents a state of the art of river network generalisation. The third part explains the problems, the hypotheses and the pre-processes necessary for selection. The fourth part describes the generalisation process proposed to solve the problem. The fifth part presents the results obtained with this process on actual French datasets. Finally, this paper is concluded with leads for further research. Numéro de notice : C2007-015 Affiliation des auteurs : COGIT (1988-2011) Thématique : GEOMATIQUE Nature : Communication DOI : 10.13140/RG.2.1.1594.4167 En ligne : http://dx.doi.org/10.13140/RG.2.1.1594.4167 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89964 Documents numériques
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River network selection ... - post-printAdobe Acrobat PDFEffect of generalization on area features: a comparative study of two strategies / T. Cheng in Cartographic journal (the), vol 43 n° 2 (July 2006)
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Titre : Effect of generalization on area features: a comparative study of two strategies Type de document : Article/Communication Auteurs : T. Cheng, Auteur ; Z. Li, Auteur Année de publication : 2006 Article en page(s) : pp 157 - 170 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] agrégation de détails
[Termes IGN] analyse comparative
[Termes IGN] carte thématique
[Termes IGN] fusion de données
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] mesure de la qualité
[Termes IGN] objet géographique zonal
[Termes IGN] qualité des données
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) The generalization of area features is a very important topic in digital map generalization, particularly in thematic map generalization. The operations used in area generalization, will cause changes in the geometry and thematic attributes of area features and the topological relationships between them. Very limited quantitative measures, especially for semantics, are available to describe the effect of generalization when multiple objects are involved or when the entire map needs to be characterized. Therefore, the aim of this study is to provide some quantitative measures for the changes (especially in semantics) that have occurred during generalization. A set of quantitative measures of data quality, i.e. accuracy, consistency, and completeness, has been developed to assess such effects. The effect of generalization on area features are compared between two approaches, geometry-based merging and theme-based aggregation. An experimental test has also been carried out to illustrate their differences in terms of the proposed quality measures, which demonstrates the practical usefulness of these measures. Numéro de notice : A2006-610 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870406X114649 En ligne : https://doi.org/10.1179/000870406X114649 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28333
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Code-barres Cote Support Localisation Section Disponibilité 030-06021 RAB Revue Centre de documentation En réserve L003 Disponible Deformation using agents for map generalization : application to the preservation of relationships between fields and objects / Julien Gaffuri (01/06/2006)
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PermalinkToward quantitative measures for the semantic quality of polygon generalization / T. Cheng in Cartographica, vol 41 n° 2 (June 2006)
PermalinkPermalinkDynamic simplification and visualization of large maps / N. Mustafa in International journal of geographical information science IJGIS, vol 20 n° 3 (march 2006)
PermalinkOutils et méthodes de généralisation du bâti pour la fabrication des cartes au 1:25.000 et au 1:50.000 / Jenny Trévisan in Bulletin d'information scientifique et technique de l'IGN, n° 75 (mars 2006)
PermalinkAutoCarto 2006, Vancouver, Washington, Volume 1. Papers / Cartography and geographic information society (2006)
PermalinkAutomatisation de l'orientation des pointeurs kilométriques & indicateurs de qualité de la généralisation pour la Top 100 / Sylvain Lafay (2006)
PermalinkCAC 105, Cartographie des activités de recherche du laboratoire COGIT 2001 - 2005 / Anne Ruas (2006)
PermalinkPermalinkConception et développement d'un processus d'intégration des mises à jour de données géographiques dans une base de données multi-échelles / F. Goulamhoussen (2006)
PermalinkConflict removal between B-spline curves for isobathymetric line generalization using a snake model / E. Guilbert in Cartography and Geographic Information Science, vol 33 n° 1 (January 2006)
PermalinkFourier series and the cartographic line / G.J. Lawford in International journal of geographical information science IJGIS, vol 20 n° 1 (january 2006)
PermalinkGeographic Information Science, Fourth International Conference, GIScience 2006, Münster, Germany, September 2006 / Martin Raubal (2006)
PermalinkHow to merge optimization and agent-based techniques in a single generalization model? / Julien Gaffuri (2006)
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PermalinkA method for generalisation of river networks based on "strokes" and database enrichment [extended abstract] / Guillaume Touya (2006)
PermalinkPermalinkProceedings of the GIS Research UK, 14th Annual Conference, GISRUK 2006, School of Geography, the University of Nottingham, 5-7 April 2006 / Gary Priestnall (2006)
PermalinkProgress in Spatial Data Handling : 12th International Symposium on Spatial Data Handling / Andreas Riedl (2006)
PermalinkSystème multi-agent pour la déformation en généralisation cartographique : un problème multi niveau / Julien Gaffuri (2006)
PermalinkPropagation des déplacements pendant un processus de généralisation / Cristel Legrand in Le monde des cartes, n° 186 (décembre 2005 - février 2006)
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