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Reaching a compromise between contextual constraints and cartographic rules : application to sustainable maps / Charlotte Hoarau in Cartography and Geographic Information Science, Vol 38 n° 2 (March 2011)
[article]
Titre : Reaching a compromise between contextual constraints and cartographic rules : application to sustainable maps Type de document : Article/Communication Auteurs : Charlotte Hoarau , Auteur Année de publication : 2011 Projets : 1-Pas de projet / Article en page(s) : pp 79 - 88 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] cartographie pour écran mobile
[Termes IGN] cohérence des couleurs
[Termes IGN] couleur à l'écran
[Termes IGN] énergie
[Termes IGN] légende cartographique
[Termes IGN] prise en compte du contexte
[Termes IGN] qualité cartographique
[Termes IGN] sémiologie graphique
[Termes IGN] visualisation cartographique
[Vedettes matières IGN] GéovisualisationRésumé : (Auteur) Emerging mobile mapping applications create new constraints for cartographers. These constraints should be considered in addition to the traditional cartographic rules used to design maps. Legend colors could be optimized regarding those constraints. A challenge for optimization concerns the preservation of map semiotic quality. In our research, we propose a quantification of the cartographic quality of a map, regarding a given reference map that considers semantic rules of association, differentiation and order conveyed by map colors. Some mobile devices require less energy to display dark colors than lighter ones. In this paper we consider the energy consumption as the contextual constraint to optimize. Map samples are designed, while taking into account some conventional uses of colors for relevant themes: hydrography, vegetation and the background layer. We discuss how to find the best compromise between a contextual constraint (the energy required to display a map on a screen of a mobile device in our example) and the cartographic consistency on colors regarding the initial semantic relationships in the legend. We answer the question of how much can cartographic rules be altered while still preserving semiotic quality. Numéro de notice : A2011-597 Affiliation des auteurs : COGIT (1988-2011) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1559/1523040638279 Date de publication en ligne : 14/03/2013 En ligne : https://doi.org/10.1559/1523040638279 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91532
in Cartography and Geographic Information Science > Vol 38 n° 2 (March 2011) . - pp 79 - 88[article]Mastering map : scale balancing workloads display and geometry change in multi-scale mapping / Cynthia A. Brewer in Geoinformatica, vol 14 n° 2 (April 2010)
[article]
Titre : Mastering map : scale balancing workloads display and geometry change in multi-scale mapping Type de document : Article/Communication Auteurs : Cynthia A. Brewer, Auteur ; Barbara P. Buttenfield, Auteur Année de publication : 2010 Article en page(s) : pp 221 - 239 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] base de données cartographiques
[Termes IGN] base de données multi-représentation
[Termes IGN] conception cartographique
[Termes IGN] données multiéchelles
[Termes IGN] échelle cartographique
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] précision des données
[Termes IGN] qualité cartographiqueRésumé : (Auteur) This paper builds on a body of European research on multiple resolution data bases (MRDBs), defining a conceptual framework for managing tasks in a multi-scale mapping project. The framework establishes a workload incorporating task difficulty, time to complete a task, required level of expertise, required resources, etc. Project managers must balance the workload among tasks with lower and higher complexity to produce a high quality cartographic product on time and within budget. We argue for increased emphasis on the role of symbol design, which often carries a lower workload than multi-scale mapping based primarily on geometry change. Countering expectations that combining symbol change with geometry change will increase workloads, we argue that in many cases, integration of the two can reduce workloads overall. To demonstrate our points, we describe two case studies drawn from a recent multi-scale mapping and database building project for Ada County, Idaho. We extend the concept of workload balancing, demonstrating that insertion of Level of Detail (LoD) datasets at intermediate scales can further reduce the workload. Previous work proposing LoDs has not reported empirical assessment, and we encourage small and large mapping organizations to contribute to such an effort. Copyright Springer Numéro de notice : A2010-066 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-009-0083-6 Date de publication en ligne : 06/05/2009 En ligne : https://doi.org/10.1007/s10707-009-0083-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30262
in Geoinformatica > vol 14 n° 2 (April 2010) . - pp 221 - 239[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Colors of the past: color image segmentation in historical topographic maps based on homogeneity / S. Leyk in Geoinformatica, vol 14 n° 1 (January 2010)
[article]
Titre : Colors of the past: color image segmentation in historical topographic maps based on homogeneity Type de document : Article/Communication Auteurs : S. Leyk, Auteur ; R. Boesch, Auteur Année de publication : 2010 Article en page(s) : pp 1 - 21 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] archives
[Termes IGN] carte numérisée
[Termes IGN] carte topographique
[Termes IGN] détection de changement
[Termes IGN] image en couleur
[Termes IGN] qualité cartographique
[Termes IGN] segmentation d'image
[Termes IGN] système d'information géographiqueRésumé : (Auteur) A novel approach to color image segmentation (CIS) in scanned archival topographic maps of the 19th century is presented. Archival maps provide unique information for GIS-based change detection and are the only spatially contiguous data sources prior to the establishment of remote sensing. Processing such documents is challenging due to their very low graphical quality caused by ageing, manual production and scanning. Typical artifacts are high degrees of mixed and false coloring, as well as blurring in the images. Existing approaches for segmentation in cartographic documents are normally presented using well-conditioned maps. The CIS approach presented here uses information from the local image plane, the frequency domain and color space. As a first step, iterative clustering is based on local homogeneity, frequency of homogeneity-tested pixels and similarity. By defining a peak-finding rule, “hidden” color layer prototypes can be identified without prior knowledge. Based on these prototypes a constrained seeded region growing (SRG) process is carried out to find connected regions of color layers using color similarity and spatial connectivity. The method was tested on map pages with different graphical properties with robust results as derived from an accuracy assessment. Copyright Springer Numéro de notice : A2010-009 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-008-0074-z Date de publication en ligne : 16/01/2009 En ligne : https://doi.org/10.1007/s10707-008-0074-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30205
in Geoinformatica > vol 14 n° 1 (January 2010) . - pp 1 - 21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2010011 RAB Revue Centre de documentation En réserve L003 Disponible Utilising urban context recognition and machine learning to improve the generalisation of buildings / Stefan Steiniger in International journal of geographical information science IJGIS, vol 24 n°1-2 (january 2010)
[article]
Titre : Utilising urban context recognition and machine learning to improve the generalisation of buildings Type de document : Article/Communication Auteurs : Stefan Steiniger, Auteur ; Patrick Taillandier , Auteur ; Robert Weibel, Auteur Année de publication : 2010 Article en page(s) : pp 253 - 282 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] apprentissage automatique
[Termes IGN] généralisation du bâti
[Termes IGN] prise en compte du contexte
[Termes IGN] qualité cartographique
[Termes IGN] système expert
[Termes IGN] système multi-agents
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) The introduction of automated generalisation procedures in map production systems requires that generalisation systems are capable of processing large amounts of map data in acceptable time and that cartographic quality is similar to traditional map products. With respect to these requirements, we examine two complementary approaches that should improve generalisation systems currently in use by national topographic mapping agencies. Our focus is particularly on self-evaluating systems, taking as an example those systems that build on the multi-agent paradigm. The first approach aims to improve the cartographic quality by utilising cartographic expert knowledge relating to spatial context. More specifically, we introduce expert rules for the selection of generalisation operations based on a classification of buildings into five urban structure types, including inner city, urban, suburban, rural, and industrial and commercial areas. The second approach aims to utilise machine learning techniques to extract heuristics that allow us to reduce the search space and hence the time in which a good cartographical solution is reached. Both approaches are tested individually and in combination for the generalisation of buildings from map scale 1:5000 to the target map scale of 1:25 000. Our experiments show improvements in terms of efficiency and effectiveness. We provide evidence that both approaches complement each other and that a combination of expert and machine learnt rules give better results than the individual approaches. Both approaches are sufficiently general to be applicable to other forms of self-evaluating, constraint-based systems than multi-agent systems, and to other feature classes than buildings. Problems have been identified resulting from difficulties to formalise cartographic quality by means of constraints for the control of the generalisation process. Copyright Taylor & Francis Numéro de notice : A2010-117 Affiliation des auteurs : COGIT+Ext (1988-2011) Autre URL associée : vers HAL Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658810902798099 Date de publication en ligne : 01/03/2010 En ligne : http://dx.doi.org/10.1080/13658810902798099 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30313
in International journal of geographical information science IJGIS > vol 24 n°1-2 (january 2010) . - pp 253 - 282[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-2010012 RAB Revue Centre de documentation En réserve L003 Disponible 079-2010011 RAB Revue Centre de documentation En réserve L003 Disponible Naïve Cartography : how intuitions about display configuration can hurt performance / M. Hegarty in Cartographica, vol 44 n° 3 (September 2009)
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Titre : Naïve Cartography : how intuitions about display configuration can hurt performance Type de document : Article/Communication Auteurs : M. Hegarty, Auteur ; H. Smallman, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 171 - 186 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] animation graphique
[Termes IGN] communication cartographique
[Termes IGN] conception cartographique
[Termes IGN] désinformation
[Termes IGN] langage cartographique
[Termes IGN] lecture de carte
[Termes IGN] performance
[Termes IGN] qualité cartographique
[Termes IGN] représentation cartographique
[Termes IGN] représentation mentale spatiale
[Termes IGN] visualisation cartographique
[Vedettes matières IGN] CartologieRésumé : (Auteur) Map-making has traditionally been the domain of professional cartographers, but with the advent of interactive display systems, users now have the flexibility to create and configure their own digital maps and other visual displays. This flexibility can be beneficial only if users have good intuitions about which display configurations are effective or ineffective for different tasks. Here we examine people's intuitions about display effectiveness and whether these intuitions match the actual effectiveness of different displays. Surveys of undergraduate students and post-graduate meteorology students reveal that they consistently prefer enhanced displays, especially those that add animation and realism. These naïve intuitions contrast with the principles of cartography, which emphasize the importance of abstracting from the real world to create simple displays that make task-relevant information salient. Both a review of objective studies and a new study presented here support traditional principles of cartography and are inconsistent with naïve intuitions. We interpret these studies in relation to new theoretical notions of users' folk fallacies about how perception works, and derive implications for the design of interactive display systems and education. Copyright University of Toronto Press Numéro de notice : A2009-409 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.44.3.171 Date de publication en ligne : 02/10/2009 En ligne : https://doi.org/10.3138/carto.44.3.171 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30040
in Cartographica > vol 44 n° 3 (September 2009) . - pp 171 - 186[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 031-09031 RAB Revue Centre de documentation En réserve L003 Disponible Analysis of planimetric accuracy of airborne laser scanning surveys / M. George Vosselman in Bulletin des sciences géographiques, n° 22 (octobre 2008)PermalinkEvaluation et amélioration des performances de la chaine MNT P+XS SPOT5 / Jean Figuerola (2008)PermalinkLa généralisation avance à petits pas / Françoise de Blomac in SIG la lettre, n° 46 (avril 2003)PermalinkL'évaluation de la généralisation / Sylvain Bard in Géomatique expert, n° 22 (01/01/2003)PermalinkPreserving cartographic quality in DTM interpolation from contour lines / Gil Rito-Gonçalves in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 3 (April - June 2002)PermalinkImproving the quality of mass produced maps / J. Simley in Cartography and Geographic Information Science, vol 28 n° 2 (April 2001)PermalinkSensitivity analysis of various influences on the planimetric displacement of commercial high-resolution satellite imagery / Yun Zhang in Geomatica, vol 54 n° 4 (December 2000)PermalinkThe influence of map design on resource management decision making / J. Mc Kendry in Cartographica, vol 37 n° 2 (June 2000)PermalinkEvaluation de la qualité des données généralisées / Sébastien Cochard (2000)PermalinkUne méthode de placement automatique des écritures des objets linéaires avec une qualité cartographique / Mathieu Barrault in Bulletin du comité français de cartographie, n° 146 - 147 (mars - août 1996)PermalinkAmélioration de la qualité du placement automatique des toponymes horizontaux / Jenny Trévisan (1996)PermalinkUne méthode de placement automatique des écritures des objets linéaires avec une qualité cartographique / Mathieu Barrault (01/07/1995)Permalink3D reconstruction of buildings from stereo images using both monocular analysis and stereo matching: an assessment within the context of cartographic production / Olivier Dissard (1995)PermalinkContrôle de la planimétrie d'une base de données vectorielles : une nouvelle méthode basée sur la distance de Hausdorff, la méthode du contrôle linéaire / Iyad Abbas in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 137 (Janvier 1995)PermalinkUn algorithme rapide de mise en correspondance de cartes / Olivier Jamet (1989)PermalinkEvaluation métrique et sémantique des images SPOT / G. Togliatti in Bulletin d'information de l'Institut géographique national, n° 56 (décembre 1988)PermalinkExpériences franco-canadiennes sur la spatiotriangulation, la précision planimétrique et altimétrique / Isabelle Veillet (13/10/1988)PermalinkStereocorrelation of Landsat TM images / Manfred Ehlers in Photogrammetric Engineering & Remote Sensing, PERS, vol 53 n° 9 (september 1987)PermalinkEvaluating a map’s image / Michael P. Peterson in American cartographer (the), vol 12 n° 1 (April 1985)Permalink[Selected papers presented at international symposia] / Kennert Torlegard (1983)Permalink