Journal cover Journal topic
Proceedings of the ICA
Journal topic
Volume 1
Proc. Int. Cartogr. Assoc., 1, 86, 2018
https://doi.org/10.5194/ica-proc-1-86-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Proc. Int. Cartogr. Assoc., 1, 86, 2018
https://doi.org/10.5194/ica-proc-1-86-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  16 May 2018

16 May 2018

Efficiency and effectiveness in case of disaster: a visual damage assessment test

Kristien Ooms1, Julia Åhlén2, and Stefan Seipel2 Kristien Ooms et al.
  • 1Department of Geography, Ghent University, Ghent, Belgium
  • 2Department of Industrial Development, IT and Land Management, Gävle University College, Gävle, Sweden

Keywords: User study, mouse & key logging, eye tracking, emergency response, damage assessment

Abstract. A user study is conducted to evaluate the efficiency and effectiveness of two types of visualizations to identify damages sites in case of disaster. The test consists out 36 trials (18 for each visualisation) and in each trial an area of 1×1km, located in Ghent, is displayed on a screen. This image shows the combined height information from before and after the disaster. The first visualisation, page flipping, is based on greyscale images with height information from the pre- and post-disaster situation between which users can switch manually. The second visualisation, difference image, is a result of subtracting the heights (before versus after) and assigning a blue-white-red colour ramp. In order to simulate the urgency with which the data is captured, systematic and random imperfections are introduced in the post-disaster data. All participants’ mouse and key interactions are logged, which is further complemented by the registration of their eye movements. This give insights the visualizations’ efficiency, effectiveness and the overall search strategies of the participants.

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