Abstract
A result of a visibility analysis on GIS can indicate landscape factors objectively. However, subjective views of individuals are also required in landscape design processes. To analyze a landscape subjectively, eye tracking systems have been drawing research interest because of their potentials in quantification. The development of hardware technology and software technology of eye tracking system has offered a new perspective and study platform for the study on landscape visual perception. Under these circumstances, the authors are trying to utilize the eye tracking system to analyze interests of participants, and trying to compare with the result of the visibility analysis on GIS. A screen-based eye-tracking system was selected because of its short calibration time. The railway overpass project in Neyagawa city has been selected as a case study.
In this study, the authors proposed the method that can generate wide-area model efficiently by utilizing GIS functions and various spatial data. Then, two types of landscape analyses were carried out on GIS. Precisely, the visibility analysis was performed by using representative points of the railway viaduct and DSM which was converted from the urban model. As the result, the influence of the viaduct on the landscape and the future landscape from the railway viaduct were clarified quantitatively by visibility analysis. In addition, the difference between the result of visibility analysis on GIS and the actual gaze trend were confirmed by utilizing the eye tracking system. From the results of this study, it can be said that there is not much relation between the visibility (calculated on GIS) and the actual gaze trend (analyzed by eye tracking system). Buildings located near the viewpoint are not gazed at well, even if their visual size are large. In addition, Objects obstructing the skyline are paid attention to.
