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Analytical estimation of map readability / Lars Harrie in ISPRS International journal of geo-information, vol 4 n°2 (June 2015)  

Public [article]  inISPRS International journal of geo-information > vol 4 n°2 (June 2015) . - pp 418 - 446 Titre : Analytical estimation of map readability Type de document : Article/Communication Auteurs : Lars Harrie, Auteur ; Hanna Stigmar, Auteur ; Milan Djordjevic, Auteur Année de publication : 2015 Article en page(s) : pp 418 - 446 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] apprentissage dirigé [Termes IGN] distribution spatiale [Termes IGN] généralisation cartographique automatisée [Termes IGN] lisibilité perceptive [Termes IGN] régression multiple [Termes IGN] séparateur à vaste marge [Termes IGN] seuillage [Termes IGN] test de performance [Termes IGN] utilisateur [Vedettes matières IGN] Cartologie Résumé : (auteur) Readability is a major issue with all maps. In this study, we evaluated whether we can predict map readability using analytical measures, both single measures and composites of measures. A user test was conducted regarding the perceived readability of a number of test map samples. Evaluations were then performed to determine how well single measures and composites of measures could describe the map readability. The evaluation of single measures showed that the amount of information was most important, followed by the spatial distribution of information. The measures of object complexity and graphical resolution were not useful for explaining the map readability of our test data. The evaluations of composites of measures included three methods: threshold evaluation, multiple linear regression and support vector machine. We found that the use of composites of measures was better for describing map readability than single measures, but we could not identify any major differences in the results of the three composite methods. The results of this study can be used to recommend readability measures for triggering and controlling the map generalization process of online maps. Numéro de notice : A2015-701 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/ijgi4020418 En ligne : https://doi.org/10.3390/ijgi4020418 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78343 [article]

Cartographic quality issues for view services in geoportals / Lars Harrie in Cartographica, vol 46 n° 2 (June 2011)  

Public [article]  inCartographica > vol 46 n° 2 (June 2011) . - pp 92 - 100 Titre : Cartographic quality issues for view services in geoportals Type de document : Article/Communication Auteurs : Lars Harrie, Auteur ; Sébastien Mustière , Auteur ; Hanna Stigmar, Auteur Année de publication : 2011 Article en page(s) : pp 92 - 100 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] géoportail [Termes IGN] qualité cartographique [Termes IGN] rédaction cartographique [Termes IGN] visualisation cartographique [Termes IGN] web mapping Résumé : (Auteur) Following the INSPIRE directive, several countries are now setting up geoportals. These geoportals have view services that offer new opportunities for users to easily display rich and personalized geographic data. However, they also raise new challenges. One challenge is the absence of the traditional cartographer, which sets requirements for the development of automatic methods that optimize the presentation of the data. This article discusses five issues for the improvement of map presentation —semantics, geometries, levels of detail, labels, and symbols— and reviews some related methods. The development of this type of method is essential for the success of view services in the future. Numéro de notice : A2011-231 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.46.2.92 Date de publication en ligne : 01/06/2011 En ligne : https://doi.org/10.3138/carto.46.2.92 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31009 [article]

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Evaluation of analytical measures of map legibility / Hanna Stigmar in Cartographic journal (the), vol 48 n° 1 (February 2011)  

Public [article]  inCartographic journal (the) > vol 48 n° 1 (February 2011) . - pp 41 - 53 Titre : Evaluation of analytical measures of map legibility Type de document : Article/Communication Auteurs : Hanna Stigmar, Auteur ; Lars Harrie, Auteur Année de publication : 2011 Article en page(s) : pp 41 - 53 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] distribution spatiale [Termes IGN] lisibilité perceptive [Termes IGN] objet cartographique [Termes IGN] objet géographique complexe [Termes IGN] service web géographique [Termes IGN] temps réel Résumé : (Auteur) The generation of maps in real-time web-services introduces challenges concerning map legibility. As these services lack the important input of a traditional cartographer, analytical measures of the legibility are called for. The aim of this study was to develop such legibility measures, and to evaluate them with the help of expert users. Measures of the amount of information, spatial distribution and object complexity were developed and evaluated. The results indicated that some of the measures could be used to describe map legibility. Numéro de notice : A2011-259 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277410Y.0000000002 Date de publication en ligne : 22/11/2013 En ligne : https://doi.org/10.1179/1743277410Y.0000000002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31037 [article]

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An evaluation of measures for quantifying map information / Lars Harrie in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 266 - 274 Titre : An evaluation of measures for quantifying map information Type de document : Article/Communication Auteurs : Lars Harrie, Auteur ; Hanna Stigmar, Auteur Année de publication : 2010 Article en page(s) : pp 266 - 274 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] diagramme de Voronoï [Termes IGN] évaluation des données [Termes IGN] généralisation à la volée [Termes IGN] objet cartographique Résumé : (Auteur) A real-time map must not contain too much information. Therefore, we need measures of map information that could be guidelines for the selection of data layers and the real-time generalisation process. In this paper we evaluate measures of the amount of information and the distribution of information. The evaluation is performed by (1) defining measures, (2) implementing the measures, (3) computing the measures for some test maps, and finally (4) comparing the values of the measures with human judgement of the map information. For amount of information, we found that the measures number of objects, number of points and object line length had better correspondence with human judgement than object area. We also found that measures based on the size of Voronoi regions of objects (respectively points) can be used for identifying the distribution of information. The results are based on the testing of only building objects. Future work should extend the test, using all object types. Numéro de notice : A2010-175 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.05.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.05.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30370 [article]

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Cartographic aspects of geoportals / Lars Harrie (2009) 

Public Titre : Cartographic aspects of geoportals Type de document : Article/Communication Auteurs : Lars Harrie, Auteur ; Sébastien Mustière , Auteur ; Heiner Stuckenschmidt, Auteur ; Hanna Stigmar, Auteur Editeur : Lund [Suède] : Lund University Année de publication : 2009 Conférence : COSIT 2009, Workshop on Presenting Spatial Information 22/09/2009 Aber Wrac'h France Importance : 12 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] conflation [Termes IGN] géoportail [Termes IGN] lisibilité optique [Termes IGN] lisibilité perceptive [Termes IGN] sémiologie graphique [Termes IGN] service web géographique Résumé : (auteur) Following the Inspire directive, several countries are now setting up geoportals. This paper focuses on the cartographic issues raised by view services in these geoportals. The problem with view services, from a cartographic perspective, is the absence of the traditional cartographer who optimizes the presentation of the cartographic data. In order to enhance the readability of the maps automatic methods should be used. The paper presents four types of methods for improving the readability: semantic, conflation generalization and symbolization methods, as well as some ideas of how the technical implementation of these methods could be performed. Numéro de notice : C2009-060 Affiliation des auteurs : COGIT+Ext (1988-2011) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComSansActesPubliés-Unpublished DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101996

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