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OpenStreetMap in GIScience : experiences, research, and applications. Inferring the Scale of OpenStreetMap Features / Guillaume Touya (2015)  

Public contenu dans OpenStreetMap in GIScience / Jamal Jokar Arsanjani (2015) Titre de série : OpenStreetMap in GIScience : experiences, research, and applications Titre : Inferring the Scale of OpenStreetMap Features Type de document : Chapitre/Contribution Auteurs : Guillaume Touya , Auteur ; Andreas W. Reimer, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2015 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Importance : pp 81 - 99 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] cartographie collaborative [Termes IGN] données localisées des bénévoles [Termes IGN] généralisation [Termes IGN] niveau de détail [Termes IGN] OpenStreetMap [Termes IGN] qualité des données Index. décimale : 37.00 Géomatique - information géographique - infrastructure de données Résumé : (auteur) Traditionally, national mapping agencies produced datasets and map products for a low number of specified and internally consistent scales, i.e. at a common level of detail (LoD). With the advent of projects like OpenStreetMap, data users are increasingly confronted with the task of dealing with heterogeneously detailed and scaled geodata. Knowing the scale of geodata is very important for mapping processes such as for generalization of label placement or land-cover studies for instance. In the following chapter, we review and compare two concurrent approaches at automatically assigning scale to OSM objects. The first approach is based on a multi-criteria decision making model, with a rationalist approach for defining and parameterizing the respective criteria, yielding five broad LoD classes. The second approach attempts to identifiy a single metric from an analysis process, which is then used to interpolate a scale equivalence. Both approaches are combined and tested against well-known Corine data, resulting in an improvement of the scale inference process. The chapter closes with a presentation of the most pressing open problems. Numéro de notice : H2015-001 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1007/978-3-319-14280-7_5 Date de publication en ligne : 04/03/2015 En ligne : https://doi.org/10.1007/978-3-319-14280-7_5 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79443

Pairwise line labeling of geographic boundaries: An efficient and practical algorithm / Maxim A. Rylov in Cartographic perspectives, n° 79 (September 2014)  

Public [article]  inCartographic perspectives > n° 79 (September 2014) . - pp 5 - 21 Titre : Pairwise line labeling of geographic boundaries: An efficient and practical algorithm Type de document : Article/Communication Auteurs : Maxim A. Rylov, Auteur ; Andreas W. Reimer, Auteur Année de publication : 2014 Article en page(s) : pp 5 - 21 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] cartographie automatique [Termes IGN] géomètrie algorithmique [Termes IGN] objet géographique linéaire [Termes IGN] placement automatique des écritures Résumé : (auteur) We present an algorithm that labels linear features with two matched toponyms describing the left and the right side of a line, respectively. Such a pairwise line labeling strategy is commonly used in manually produced maps to differentiate administrative or other geographic divisions. Our approach solves two basic tasks of the automated map labeling problem, namely candidate-position generation and position evaluation for a given scale. The quality of the name placement is evaluated by comparison to a set of established cartographic principles and guidelines for linear features. We give some results of our experiments based on real datasets. The implementation of our algorithm shows that it is simple and robust, and the resulting sample maps demonstrate its practical efficiency. Numéro de notice : A2014-770 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.14714/CP79.1212 En ligne : https://doi.org/10.14714/CP79.1212 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77002 [article]

A comprehensive multi-criteria model for high cartographic quality point-feature label placement / Maxim A. Rylov in Cartographica, vol 49 n° 1 (March 2014)  

Public [article]  inCartographica > vol 49 n° 1 (March 2014) . - pp 52 - 68 Titre : A comprehensive multi-criteria model for high cartographic quality point-feature label placement Type de document : Article/Communication Auteurs : Maxim A. Rylov, Auteur ; Andreas W. Reimer, Auteur Année de publication : 2014 Article en page(s) : pp 52 - 68 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] lisibilité perceptive [Termes IGN] objet géographique ponctuel [Termes IGN] placement automatique des écritures [Termes IGN] qualité cartographique Résumé : (Auteur) The lettering process, including assigning names to point features, is an essential part of map production. While there have been numerous and varied research efforts to automate point-feature label placement (PFLP), none of them seems to have taken into account the many well-established cartographic precepts for point-feature annotation used by human cartographers. As a result, current fully automated solutions are limited in their expressive power. The PFLP problem is still vital, therefore, and solving it is a compelling challenge. This article presents a comprehensive multi-criterion model that complies with almost all well-defined cartographic placement principles and requirements for PFLP, allowing for a significant increase in toponym density without affecting legibility. The proposed model, expressed as a quality-evaluation function, can be used by any mathematical optimization algorithm to resolve the automated label-placement problem. Through an application of the proposed model tested on volunteered geographic (VGI) data and the creation of sample parameter settings, the article illustrates that a high level of cartographic quality for PFLP can be achieved through the integrated approach, comparable to the lettering produced by an expert cartographer. Numéro de notice : A2014-186 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.49.1.2137 En ligne : http://www.utpjournals.press/doi/pdf/10.3138/carto.49.1.2137 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33091 [article]

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Topologically safe curved schematisation / Arthur Van Goethem in Cartographic journal (the), vol 50 n° 3 (August 2013)  

Public [article]  inCartographic journal (the) > vol 50 n° 3 (August 2013) . - pp 276 - 285 Titre : Topologically safe curved schematisation Type de document : Article/Communication Auteurs : Arthur Van Goethem, Auteur ; Wouter Meulemans, Auteur ; Andreas W. Reimer, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 276 - 285 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] courbe [Termes IGN] courbe de Bézier [Termes IGN] diagramme de Voronoï [Termes IGN] généralisation automatique de données [Termes IGN] généralisation cartographique automatisée [Termes IGN] intégrité topologique [Termes IGN] simplification de contour Résumé : (Auteur) Traditionally schematised maps make extensive use of curves. However, automated methods for schematisation are mostly restricted to straight lines. We present a generic framework for topology-preserving curved schematisation that allows a choice of quality measures and curve types. The framework fits a curve to every part of the input. It uses Voronoi diagrams to ensure that curves fitted to disjoint parts do not intersect. The framework then employs a dynamic program to find an optimal schematisation using the fitted curves. Our fully-automated approach does not need critical points or salient features. We illustrate our framework with Bézier curves and circular arcs. Numéro de notice : A2013-467 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000066 En ligne : https://doi.org/10.1179/1743277413Y.0000000066 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32605 [article]

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Understanding chorematic diagrams : towards a taxonomy / Andreas W. Reimer in Cartographic journal (the), vol 47 n° 4 (November 2010)  

Public [article]  inCartographic journal (the) > vol 47 n° 4 (November 2010) . - pp 330 - 350 Titre : Understanding chorematic diagrams : towards a taxonomy Type de document : Article/Communication Auteurs : Andreas W. Reimer, Auteur Année de publication : 2010 Article en page(s) : pp 330 - 350 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes IGN] cartogramme [Termes IGN] cartologie [Termes IGN] chorème [Termes IGN] conception cartographique [Termes IGN] histoire de la cartographie [Termes IGN] schéma conceptuel de données [Termes IGN] taxinomie [Termes IGN] zone d'intérêt Résumé : (Auteur) Chorematic diagrams are prospective candidates for communicating highly generalised geographic information about a given region of interest. Chorematic diagrams were popularized in France as the graphical artefacts of a specific school of geographic thought established by Roger Brunet, with GIP-RECLUS as his institutional backing. Although many maps were created and a lively debate ensued, only few consolidated cartographic findings were generated and even less were made known to the international scientific community. This article presents a contextualizing review and proposes a cartographic taxonomy aimed at being a first step towards efforts for the automated generation of chorematic diagrams. Numéro de notice : A2010-542 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870410X12825500202896 Date de publication en ligne : 29/11/2013 En ligne : https://doi.org/10.1179/000870410X12825500202896 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30734 [article]

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