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Empirical studies on the visual perception of spatial patterns in choropleth maps / Jochen Schiewe in KN, Journal of Cartography and Geographic Information, vol 69 n° 3 (September 2019)
[article]
Titre : Empirical studies on the visual perception of spatial patterns in choropleth maps Type de document : Article/Communication Auteurs : Jochen Schiewe, Auteur Année de publication : 2019 Article en page(s) : pp 217 - 228 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse de données
[Termes IGN] carte choroplèthe
[Termes IGN] couleur (rédaction cartographique)
[Termes IGN] enquête
[Termes IGN] erreur systématique
[Termes IGN] rédaction cartographique
[Termes IGN] vision
[Vedettes matières IGN] CartologieRésumé : (Auteur) An essential purpose of choropleth maps is the visual perception of spatial patterns (such as the detection of hot spots or extreme values). This requires an effective and as intuitive as possible comparison of color values between different regions. Accordingly, a number of design requirements must be considered. Due to the lack of empirical evidence regarding some elementary design aspects, an online study with 260 participants was conducted. Three closely related effects were examined: the “dark-is-more bias” (i.e., the intuitive ranking of color lightness), the “area-size bias” (i.e., the neglect of small areas, since these are less dominant in perception than larger ones) and the “data-classification effect” (i.e., attention to data classification when interpreting spatial patterns). For each hypothesis, one or more maps in connection with single or multiple choice questions were presented. Users should detect extreme values, central tendencies or homogeneities of values as well as comment on their task solving certainty. In general, the hypotheses regarding the mentioned effects could be confirmed by statistical analysis. The results are used to derive conclusions and topics for future research. In particular, further comparative empirical studies are recommended to determine the best possible map types for given applications, also considering alternatives to choropleth maps. Numéro de notice : A2019-459 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s42489-019-00026-y Date de publication en ligne : 13/08/2019 En ligne : https://doi.org/10.1007/s42489-019-00026-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93550
in KN, Journal of Cartography and Geographic Information > vol 69 n° 3 (September 2019) . - pp 217 - 228[article]Exploring the synergy between Landsat and ASAR towards improving thematic mapping accuracy of optical EO data / Alexander Cass in Applied geomatics, vol 11 n° 3 (September 2019)
[article]
Titre : Exploring the synergy between Landsat and ASAR towards improving thematic mapping accuracy of optical EO data Type de document : Article/Communication Auteurs : Alexander Cass, Auteur ; George P. Petropoulos, Auteur ; Konstantinos P. Ferentinos, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 277 - 288 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image mixte
[Termes IGN] carte d'occupation du sol
[Termes IGN] cartographie thématique
[Termes IGN] classification orientée objet
[Termes IGN] image Envisat-ASAR
[Termes IGN] image Landsat-TM
[Termes IGN] image optique
[Termes IGN] image radar
[Termes IGN] Pays de Galles
[Termes IGN] surface cultivéeRésumé : (Auteur) Earth Observation (EO) provides a unique means of obtaining information on land use/cover and of its changes, which is of key importance in many scientific and practical applications. EO data is already widely used, for example, in environmental practices or decision-making related to food availability and security. As such, it is imperative to examine the suitability of different EO datasets, including their synergies, in respect to their ability to create products and tools for such practices and to guide effectively such decisions. This work aims at exploring the added value of the synergistic use of optical and radar data (from the Landsat TM and Advanced Synthetic Aperture Radar (ASAR) sensors respectively). Such information can help towards improving the accuracy of land cover classifications from EO datasets. As a case study, the region of Wales in the UK has been used. Two classifications—one based on optical data alone and another one developed from the synergy of optical and RADAR datasets acquired nearly, concurrently were developed for the studied region. Evaluation of the derived land/use cover maps was performed on the basis of the confusion matrix using validation points derived from a Phase 1 habitat map of Wales. The results showed 15% increase in overall accuracy (84% from 69%) and kappa coefficient (0.81 from 0.65) using the synergistic approach over the scenario where only optical data were used in the classification. In addition, McNemar’s test was used to assess the statistical significance of the obtained results. Results of this test provided further confirmed that the use of optical data synergistically with the radar data provides more accurate land use/cover maps in comparison with the use of optical data alone. Numéro de notice : A2019-461 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s12518-019-00258-7 Date de publication en ligne : 13/04/2019 En ligne : https://doi.org/10.1007/s12518-019-00258-7 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93601
in Applied geomatics > vol 11 n° 3 (September 2019) . - pp 277 - 288[article]Hexagonal map grids – an experimental study on the performance in memory of object locations / Dennis Edler in Cartography and Geographic Information Science, Vol 46 n° 5 (September 2019)
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Titre : Hexagonal map grids – an experimental study on the performance in memory of object locations Type de document : Article/Communication Auteurs : Dennis Edler, Auteur ; Julian Keil, Auteur ; Anne-Kathrin Bestgen, Auteur ; Lars Kuchinke, Auteur ; Frank Dickmann, Auteur Année de publication : 2019 Article en page(s) : pp 401 - 411 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] carroyage
[Termes IGN] carte cognitive
[Termes IGN] cognition
[Termes IGN] grille
[Termes IGN] mémoire
[Termes IGN] représentation mentale spatiale
[Termes IGN] système de grille globale discrète
[Vedettes matières IGN] CartologieRésumé : (auteur) In various every day contexts, maps are used as media supporting orientation, wayfinding, and navigation tasks. To create highly accurate and reliable maps, cartographers must be aware of cognitive effects that occur when people process map information. Interdisciplinary research from cognitive psychologists showed that map graphics lead to spatial distortions in human spatial memory. These distortions can influence human orientation capacities. Recently, it was discovered that grid structures overlaid on maps help to correct spatial distortions in cognitive representations of geographic space. Square grids chunk a map into smaller units (regions). They guide map-viewing behavior, and their regular structure helps map users to recall learned locations of objects more accurately. The effects caused by square grids may also occur when overlaying other common kinds of geometries, such as hexagonal structures. The effects of hexagonal grid structures on memory of object locations were investigated in this map-experimental study. The study design is based on a recall-memory-paradigm, an established method of experimental psychology to measure performance in memory. The results show that hexagonal grid patterns can improve the performance. Numéro de notice : A2019-425 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/15230406.2018.1496035 Date de publication en ligne : 03/08/2018 En ligne : https://doi.org/10.1080/15230406.2018.1496035 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93557
in Cartography and Geographic Information Science > Vol 46 n° 5 (September 2019) . - pp 401 - 411[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-2019051 RAB Revue Centre de documentation En réserve L003 Disponible A method for drawing vertical curve in longitudinal profile in road project / Hüseyin İnce in Survey review, vol 51 n° 368 (September 2019)
[article]
Titre : A method for drawing vertical curve in longitudinal profile in road project Type de document : Article/Communication Auteurs : Hüseyin İnce, Auteur ; Nuri Erdem, Auteur Année de publication : 2019 Article en page(s) : pp 413 - 421 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse numérique
[Termes IGN] courbe
[Termes IGN] échelle cartographique
[Termes IGN] gradient de pente
[Termes IGN] profil en long
[Termes IGN] projet routierRésumé : (Auteur) In road projects, there is a difficulty in drawing tangent points of the calculated vertical curve, turning point and intermediate points due to horizontal and vertical scale differences. This problem is brought about by the fact that proportional relationship between the two different scales is not known for a length with a certain slope in longitudinal profile. This study proposes a method to eliminate this problem. It also gives an example and discusses the findings. Numéro de notice : A2019-367 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00396265.2018.1470071 Date de publication en ligne : 15/05/2018 En ligne : https://doi.org/10.1080/00396265.2018.1470071 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93473
in Survey review > vol 51 n° 368 (September 2019) . - pp 413 - 421[article]Topographie et archéologie, du cordeau au tout numérique : plus de 40 ans d'interactions / Bertrand Chazaly in XYZ, n° 160 (septembre 2019)
[article]
Titre : Topographie et archéologie, du cordeau au tout numérique : plus de 40 ans d'interactions Type de document : Article/Communication Auteurs : Bertrand Chazaly, Auteur Année de publication : 2019 Article en page(s) : pp 89 - 95 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Topographie
[Termes IGN] analyse diachronique
[Termes IGN] archéologie
[Termes IGN] bâtiment
[Termes IGN] carroyage
[Termes IGN] carte archéologique
[Termes IGN] cartographie automatique
[Termes IGN] données localisées 3D
[Termes IGN] Egypte
[Termes IGN] évolution technologique
[Termes IGN] fouille archéologique
[Termes IGN] grotte
[Termes IGN] image aérienne
[Termes IGN] orthoimage
[Termes IGN] photogrammétrie numérique
[Termes IGN] télédétection par lidar
[Termes IGN] triangulationRésumé : (Auteur) La topographie et l’archéologie sont intimement liées depuis des décennies. De la station totale au scanner laser 3D, du redressement simple d’images à la photogrammétrie numérique et au drone lidar, les progrès dans les moyens et les méthodes de mesure ont accompagné le développement des stratégies de fouille et apporté à l’archéologue de plus en plus de solutions pour analyser et restituer le site qu’il étudie. Numéro de notice : A2019-481 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtSansCL DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93656
in XYZ > n° 160 (septembre 2019) . - pp 89 - 95[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 112-2019031 RAB Revue Centre de documentation En réserve L003 Disponible “Mapping-with”: The Politics of (Counter-)classification in OpenStreetMap / Clancy Wilmott in Cartographic perspectives, n° 92 (2019)PermalinkAnalysis of collaboration networks in OpenStreetMap through weighted social multigraph mining / Quy Thy Truong in International journal of geographical information science IJGIS, vol 33 n° 7 - 8 (July - August 2019)PermalinkGraphically supported evaluation of mapping techniques used in presenting spatial accessibility / Lukasz Wielebski in Cartography and Geographic Information Science, Vol 46 n° 4 (July 2019)PermalinkMultiscale cartographic visualization of harmonized datasets / Peter Kunz in International journal of cartography, vol 5 n° 2-3 (July - November 2019)PermalinkVGI contributors’ awareness of geographic information quality and its effect on data quality: a case study from Japan / Jun Yamashita in International journal of cartography, vol 5 n° 2-3 (July - November 2019)PermalinkVisual clutter reduction in zoomable proportional point symbol maps / Tomasz Opach in Cartography and Geographic Information Science, Vol 46 n° 4 (July 2019)PermalinkCartographic symbol design considerations for the space–time cube / Christopher League in Cartographic journal (the), Vol 56 n° 2 (May 2019)PermalinkMeasuring the influence of map label density on perceived complexity: a user study using eye tracking / Liao Hua in Cartography and Geographic Information Science, vol 46 n° 3 (May 2019)PermalinkQuand l'URSS inventait OpenStreetMap ... / Olivier Razemon in Géomètre, n° 2169 (mai 2019)Permalinkn° 94 - Avril 2019 - Cartographie 4.0 : naviguer avec les cartes du XXIème siècle (Bulletin de Responsabilité et environnement) / Françoise RourePermalinkChamps et objets pour mieux représenter les phénomènes dans leur contexte géographique / Anne Ruas in Revue internationale de géomatique, vol 29 n° 2 (avril - juin 2019)PermalinkBertin’s matrix concepts reconsidered: transformations of semantics and semiotics to support geovisualization use / Francis Harvey in Cartography and Geographic Information Science, vol 46 n° 2 (March 2019)PermalinkBuilding detection and regularisation using DSM and imagery information / Yousif A. Mousa in Photogrammetric record, vol 34 n° 165 (March 2019)PermalinkComparing finite and infinitesimal map distortion measures / Krisztian Kerkovits in International journal of cartography, vol 5 n° 1 (March 2019)PermalinkExpanding the Sémiologie Graphique for contemporary cartography, some ideas from visual semiotics, art history and design / Laurent Jégou in Cartography and Geographic Information Science, vol 46 n° 2 (March 2019)PermalinkGeographic space as a living structure for predicting human activities using big data / Bin Jiang in International journal of geographical information science IJGIS, Vol 33 n° 3-4 (March - April 2019)PermalinkInferring user tasks in pedestrian navigation from eye movement data in real-world environments / Hua Liao in International journal of geographical information science IJGIS, Vol 33 n° 3-4 (March - April 2019)Permalink(re)Considering Bertin in the age of big data and visual analytics / Alan M. MacEachren in Cartography and Geographic Information Science, vol 46 n° 2 (March 2019)PermalinkThe effect of topography and elevation on viewsheds in mountain landscapes using geovisualization / Loukas-Moysis Misthos in International journal of cartography, vol 5 n° 1 (March 2019)PermalinkThe Equal Earth map projection / Bojan Šavrič in International journal of geographical information science IJGIS, Vol 33 n° 3-4 (March - April 2019)Permalink