Perceptual complexity of soil-landscape maps: a user evaluation of color organization in legend designs using eye tracking

Coltekin, A, Brychtova, A, Griffin, A, Robinson, A, Imhof, M and Pettit, C 2017, 'Perceptual complexity of soil-landscape maps: a user evaluation of color organization in legend designs using eye tracking', International Journal of Digital Earth, vol. 10, no. 6, pp. 560-581.


Document type: Journal Article
Collection: Journal Articles

Title Perceptual complexity of soil-landscape maps: a user evaluation of color organization in legend designs using eye tracking
Author(s) Coltekin, A
Brychtova, A
Griffin, A
Robinson, A
Imhof, M
Pettit, C
Year 2017
Journal name International Journal of Digital Earth
Volume number 10
Issue number 6
Start page 560
End page 581
Total pages 22
Publisher Taylor and Francis
Abstract We compared the ability of two legend designs on a soil-landscape map to efficiently and effectively support map reading tasks with the goal of better understanding how the design choices affect user performance. Developing such knowledge is essential to design effective interfaces for digital earth systems. One of the two legends contained an alphabetical ordering of categories, while the other used a perceptual grouping based on the Munsell color space. We tested the two legends for 4 tasks with 20 experts (in geography-related domains). We analyzed traditional usability metrics and participants' eye movements to identify the possible reasons behind their success and failure in the experimental tasks. Surprisingly, an overwhelming majority of the participants failed to arrive at the correct responses for two of the four tasks, irrespective of the legend design. Furthermore, participants' prior knowledge of soils and map interpretation abilities led to interesting performance differences between the two legend types. We discuss how participant background might have played a role in performance and why some tasks were particularly hard to solve despite participants' relatively high levels of experience in map reading. Based on our observations, we caution soil cartographers to be aware of the perceptual complexity of soil-landscape maps.
Subject Cartography
Visual Communication Design (incl. Graphic Design)
Keyword(s) color
empirical study
eye tracking
legend design
Soil-landscape maps
visual complexity
DOI - identifier 10.1080/17538947.2016.1234007
Copyright notice © 2016 Informa UK Limited, trading as Taylor & Francis Group.
ISSN 1753-8947
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