3D Point Clouds and Eye Tracking for Investigating the Perception and Acceptance of Power Lines in Different Landscapes

Abstract

The perception of the visual landscape impact is a significant factor explaining the public’s acceptance of energy infrastructure developments. Yet, there is lack of knowledge how people perceive and accept power lines in certain landscape types and in combination with wind turbines, a required setting to achieve goals of the energy turnaround. The goal of this work was to demonstrate how 3D point cloud visualizations could be used for an eye tracking study to systematically investigate the perception of landscape scenarios with power lines. 3D visualizations of near-natural and urban landscapes were prepared based on data from airborne and terrestrial laser scanning. These scenes were altered with varying amounts of the respective infrastructure, and they provided the stimuli in a laboratory experiment with 49 participants. Eye tracking and questionnaires served for measuring the participants’ responses. The results show that the point cloud-based simulations offered suitable stimuli for the eye tracking study. Particularly for the analysis of guided perceptions, the approach fostered an understanding of disturbing landscape elements. A comparative in situ eye tracking study is recommended to further evaluate the quality of the point cloud simulations, whether they produce similar responses as in the real world.

Mapping Landscape Spaces

“…A heat map (or dynamic heat map video) displays focus points of observation and indicates dominant visual elements in the field. A fixation map (or eye-tracking video) catches and records eye movements which can visualise the visual queue and affordances for wayfinding in a landscape scene (de Lucio et al, 1996;Massaro et al, 2012;Popelka & Brychtova, 2013;Ren & Kang, 2015;Junker & Nollen, 2018;Wissen Hayek et al, 2019).…”