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Auteur Alžběta Brychtová |
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The effect of spatial distance on the discriminability of colors in maps / Alžběta Brychtová in Cartography and Geographic Information Science, Vol 44 n° 3 (May 2017)
[article]
Titre : The effect of spatial distance on the discriminability of colors in maps Type de document : Article/Communication Auteurs : Alžběta Brychtová, Auteur ; Arzu Çöltekin, Auteur Année de publication : 2017 Article en page(s) : pp 229 - 245 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique
[Termes IGN] couleur (rédaction cartographique)
[Termes IGN] lecture de carte
[Termes IGN] lisibilité perceptive
[Termes IGN] symbole graphique
[Termes IGN] teinteRésumé : (auteur) The spatial distance (gap) between map symbols can have a great impact on their discriminability, however, there is little empirical evidence to establish spatial and attribute thresholds. In this paper, we examine the effect of the spatial gap in discriminability of color hue and value, that is, we conducted an online study to obtain performance metrics; then an eye-tracking study to understand participants’ strategies and cognitive processes. Participants completed two experimental tasks (compare two areas and decide if their color is the same; and compare three areas and rank them from the lightest to the darkest). The color distances and the spatial distances were strictly controlled for the compared areas. Our analyses confirmed that, overall, increasing the gap between colors has a consistent negative impact on the ability to differentiate them with both sequential and qualitative schemes. Furthermore, we observed that sequential schemes require larger color distances than qualitative schemes for discriminability. Finally, our results suggested that for qualitative colors, the largest tested color distance ∆E00 = 10 yields considerably higher levels of accuracy in color discrimination (even when the spatial gap between the two colors is large), thus we recommend ∆E00 = 10 to practicing cartographers and other information visualization designers. Numéro de notice : A2017-209 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2016.1140074 En ligne : http://dx.doi.org/10.1080/15230406.2016.1140074 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85046
in Cartography and Geographic Information Science > Vol 44 n° 3 (May 2017) . - pp 229 - 245[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-2017031 RAB Revue Centre de documentation En réserve L003 Disponible Discriminating classes of sequential and qualitative colour schemes / Alžběta Brychtová in International journal of cartography, vol 1 n° 1 (August 2015)
[article]
Titre : Discriminating classes of sequential and qualitative colour schemes Type de document : Article/Communication Auteurs : Alžběta Brychtová, Auteur ; Arzu Çöltekin, Auteur Année de publication : 2015 Article en page(s) : pp 62 - 78 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] carte choroplèthe
[Termes IGN] carte polychrome
[Termes IGN] convivialité
[Termes IGN] couleur (rédaction cartographique)
[Termes IGN] lecture de carte
[Termes IGN] lisibilité perceptive
[Termes IGN] oculométrie
[Vedettes matières IGN] CartologieRésumé : (auteur) We present an analysis of the influence of colour distance on the user experience with choropleth and chorochromatic maps. We systematically evaluated five sequential and five qualitative colour schemes in a two-stage user experiment. At first, we conducted an online study to obtain performance metrics accuracy and response time from a large, heterogeneous population. Following this, in a controlled lab study with eye-tracking, we re-examined the findings from the online study for a subset of experimental stimuli and further assessed the user experience through an analysis of their visual behaviour. In this process, along with accuracy and response time, eye-tracking metrics fixation frequency, fixation duration and scanpath speed as well as a gaze transition analysis were utilized. In both experiments, participants were asked to compare two areas with controlled colour distances between them, and decide whether these areas were of the same colour. Results suggest that we are able to discriminate narrower colour distances than commonly used in practice, however, not as narrow as suggested in previous literature. Numéro de notice : A2015-402 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/23729333.2015.1055643 En ligne : https://doi.org/10.1080/23729333.2015.1055643 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76888
in International journal of cartography > vol 1 n° 1 (August 2015) . - pp 62 - 78[article]