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Adding intermediate representations in a multi-scale map to enable a smooth zooming / Marion Dumont (2015)    

Public contenu dans AGILE PhD School 2015, PhD School of the Association of Geographic Information Laboratories for Europe / Stefan Ivanovic (2015)   Titre : Adding intermediate representations in a multi-scale map to enable a smooth zooming Type de document : Article/Communication Auteurs : Marion Dumont , Auteur ; Guillaume Touya , Auteur ; Cécile Duchêne , Auteur Editeur : Aix-la-Chapelle [Allemagne] : CEUR-WS Année de publication : 2015 Collection : CEUR Workshop Proceedings, ISSN 1613-0073 Conférence : AGILE PhD-School 2015 15/09/2015 18/09/2015 Champs-sur-Marne France open access proceedings Importance : 5 p. Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] données multiéchelles [Termes IGN] échelle cartographique [Termes IGN] généralisation cartographique automatisée [Termes IGN] représentation intermédiaire [Vedettes matières IGN] Généralisation Résumé : (auteur) [introduction] Mapping applications, i.e. websites where a multi-scale navigation in topographic maps is available, may be used for wayfinding purpose for instance. Such mapping applications display multi-scale maps, i.e. set of maps at different scale. However, the displayed representations can present large differences. To recognize the different representations of the same real world entity across scales, users sometimes have to make a quite important cognitive effort. We make the assumption that adding intermediate representations may be one way to reduce the gaps between the existing levels and thus to ease the user navigation. [...] Numéro de notice : C2015-010 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans Date de publication en ligne : 02/06/2016 En ligne : http://ceur-ws.org/Vol-1598/paper17.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81039

Documents numériques

en open access Adding intermediate representations Adobe Acrobat PDF

Automated generalisation of intermediate levels in a multi-scale pyramid / Marion Dumont (2015)  

Public Titre : Automated generalisation of intermediate levels in a multi-scale pyramid Type de document : Article/Communication Auteurs : Marion Dumont , Auteur ; Guillaume Touya , Auteur ; Cécile Duchêne , Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2015 Projets : MapMuxing / Christophe, Sidonie Conférence : ICA 2015, 18th workshop, Commission on Generalisation and Multiple Representation 21/08/2015 18/09/2015 Rio de Janeiro Brésil open access proceedings Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse multiéchelle [Termes IGN] généralisation cartographique automatisée [Termes IGN] niveau de détail [Termes IGN] représentation multiple [Vedettes matières IGN] Généralisation Résumé : (auteur) [introduction] For planning some trip or localising an area of interest, people can use mapping applications such as Google Maps, OpenStreetMap or the governmental Geoportals. These tasks involve navigating through data by panning, zooming in a scale range or switching between different types of geographic information (topographical map, satellite imagery, thematic data, etc.). It uses a large set of data, from various sources and with different representations or resolutions. A mapping application displays a multi-scale map (or pyramid), where each scale (or level) represents a specific level of detail. These levels can present large differences in terms of content and representation (Figure 1), owed to the data heterogeneity, the generalization processes or the symbolization choices. These gaps may disturb or even lose the user while zooming in and out, making sometimes the map navigation cognitively difficult. Numéro de notice : C2015-029 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://generalisation.icaci.org/index.php/prevevents/11-previous-events-details/ [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83181

Documents numériques

en open access Automated generalisation - communication Adobe Acrobat PDF

en open access Automated generalisation - slides Adobe Acrobat PDF

The fractal nature of maps and mapping / Bin Jiang in International journal of geographical information science IJGIS, vol 29 n° 1 (January 2015)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 29 n° 1 (January 2015) . - pp 159 - 174 Titre : The fractal nature of maps and mapping Type de document : Article/Communication Auteurs : Bin Jiang, Auteur Année de publication : 2015 Article en page(s) : pp 159 - 174 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] cartographie statistique [Termes IGN] échelle cartographique [Termes IGN] généralisation cartographique automatisée [Termes IGN] objet fractal [Vedettes matières IGN] Cartologie Résumé : (Auteur) A fractal can be simply understood as a set or pattern in which there are far more small things than large ones, for example, far more small geographic features than large ones on the earth surface, or far more large-scale maps than small-scale maps for a geographic region. This article attempts to argue and provide evidence for the fractal nature of maps and mapping. It is the underlying fractal structure of geographic features, either natural or man-made, that make reality mappable, large-scale maps generalizable, and cities imageable. The fractal nature is also what underlies the beauty of maps. After introducing some key fractal concepts such as recursion, self-similarity, scaling ratio, and scaling exponent, this article demonstrates that fractal thought is rooted in long-standing map-making practices such as series maps subdivision, visual hierarchy, and Töpfer’s radical law. Drawing on previous studies on head/tail breaks, mapping can be considered a head/tail breaks process; that is to divide things around an average, according to their geometric, topological and/or semantic properties, into the head (for those above the average) and the tail (for those below the average), and recursively continue the dividing process for the head for map generalization, statistical mapping, and cognitive mapping. Given the fractal nature of maps and mapping, cartography should be considered a perfect combination of science and art, and scaling must be formulated as a law of cartography or that of geography in general. Numéro de notice : A2015-576 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2014.953165 En ligne : http://www.tandfonline.com/doi/full/10.1080/13658816.2014.953165 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77838 [article]

Characterisation of building alignments with new measures using C4.5 decision tree algorithm / Sinan Cetinkaya in Geodetski vestnik, vol 58 n° 3 ([01/09/2014])  

Public [article]  inGeodetski vestnik > vol 58 n° 3 [01/09/2014] . - pp 552 - 567 Titre : Characterisation of building alignments with new measures using C4.5 decision tree algorithm Type de document : Article/Communication Auteurs : Sinan Cetinkaya, Auteur ; Melih Basaraner, Auteur Année de publication : 2014 Article en page(s) : pp 552 - 567 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] alignement [Termes IGN] arbre de décision [Termes IGN] bati [Termes IGN] caractérisation [Termes IGN] classification dirigée [Termes IGN] généralisation cartographique automatisée [Termes IGN] régression [Termes IGN] triangulation de Delaunay Résumé : (auteur) Detection and characterisation of spatial patterns is crucial for cartographic generalisation since it entails preserving the patterns as much as possible within scale limits. Building alignments are commonly confronted patterns in the topographic maps/databases. They are perceptually recognised in accordance with relevant Gestalt factors, namely proximity, similarity, common orientation and continuity. This study is concentrated on how to characterise building alignments detected by automated or manual methods. To this end, new measures based on Delaunay triangulation and regression line/curve are established to correspond to the Gestalt factors. The relationship between the measures and Gestalt principles has been illustrated with a decision tree. An index value was computed by total sum of measures’ values to compare and order alignments from quality aspect. Additionally, a supervised classification was performed with C4.5 algorithm thus a decision tree was obtained to be able to both associate the quality categories with the measure values and automatically assign alignments into a quality class. The findings demonstrate that proposed measures are substantially effective for representing Gestalt factors. The proposed methods can potentially enhance and ease the characterisation of building alignments in topographic map generalization. Numéro de notice : A2014-560 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.15292/geodetski-vestnik.2014.03.552-567 En ligne : http://dx.doi.org/10.15292/geodetski-vestnik.2014.03.552-567 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74701 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
139-2014031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Road network selection for medium scales using an extended stroke-mesh combination algorithm / Stefan A. Benz in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)  

Public [article]  inCartography and Geographic Information Science > vol 41 n° 4 (September 2014) . - pp 323 - 339 Titre : Road network selection for medium scales using an extended stroke-mesh combination algorithm Type de document : Article/Communication Auteurs : Stefan A. Benz, Auteur ; Robert Weibel, Auteur Année de publication : 2014 Article en page(s) : pp 323 - 339 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] 1:10.000 [Termes IGN] 1:50.000 [Termes IGN] chaîne de production [Termes IGN] généralisation cartographique automatisée [Termes IGN] maillage [Termes IGN] point d'intérêt [Termes IGN] réseau routier [Termes IGN] Swisstopo Résumé : (auteur) The road network is an essential feature class in topographic maps and databases. Road network selection for smaller scales forms a prerequisite for all other generalization operators and is thus a fundamental operation in the overall process of topographic map and database production. The objective of this paper was to develop an algorithm for automated road network selection from a large-scale (1:10,000) to a medium-scale database (1:50,000). The project was pursued in collaboration with swisstopo, the national mapping agency of Switzerland. Three algorithms (a stroke-based, a mesh-based, and a combined stroke-mesh algorithm) were implemented from the literature and analyzed using swisstopo’s large-scale TLM3D spatial database, with requirements set forth by expert cartographers. Initial experiments showed that the combination algorithm performed best, yet still it could not meet all requirements. Therefore, extensions to the basic stroke-mesh algorithm were developed, significantly improving the selection result with real-world, large test databases. Three extensions introduce modifications to the stroke-mesh combination algorithm. Furthermore, two extensions include external feature classes, ensuring accessibility of points of interest and appropriate network density representation in settlement areas, respectively. The results were evaluated by expert cartographers, who concluded that the proposed approach is ready to be deployed in production at swisstopo. Numéro de notice : A2014-428 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.928482 En ligne : https://doi.org/10.1080/15230406.2014.928482 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73965 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Urban structure generalization in multi-agent process by use of reactional agents / Jérémy Renard in Transactions in GIS, vol 18 n° 2 (April 2014)    

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Use of artificial neural networks for selective omission in updating road networks / Qi Zhou in Cartographic journal (the), vol 51 n° 1 (February 2014)  

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Abstracting geographic information in a data rich world, ch. 1. Map generalisation: fundamental to the modelling and understanding of geographic space / William A Mackaness (2014)  

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Abstracting geographic information in a data rich world, ch. 11. Generalisation in practice within national mapping agencies / Cécile Duchêne (2014)  

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Abstracting geographic information in a data rich world, ch. 12. Conclusion: major achievements and research challenges in generalisation / Dirk Burghardt (2014)  

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Abstracting geographic information in a data rich world, ch. 2. Map specifications and user requirements / Sandrine Balley (2014)  

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Abstracting geographic information in a data rich world, ch. 7. Process modelling, web services and geoprocessing / Nicolas Regnauld (2014)  

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Abstracting geographic information in a data rich world / Dirk Burghardt (2014)

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Cartographic generalisation aware of multiple representations / Jean-François Girres (2014) 

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Collaboration on an ontology for generalisation / Nick Gould (2014)    

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