Determining the Weightage of Visual Aesthetic Variables for Permanent Urban Forest Reserves Based on the Converging Approach

Abstract

Permanent urban forest reserves are aesthetic assets within cities. Consequently, their aesthetic quality must be continuously preserved and visually assessed. Even though numerous studies have utilized multiple variables to characterize visual aesthetics, they have lacked information on the importance and weightage of each variable, making it very challenging to assess this. Therefore, this study aimed to determine the relative weightage of the visual aesthetic variables for permanent urban forest reserves in Malaysia. We used a converging approach assessment method to determine the ranked preferences for the visual aesthetic variables of permanent urban forest reserves by selecting multiple variables based on public preferences and expert survey assessments of these. In addition, we utilized the converging approach results as a guide for the analytic hierarchy process in order to determine the weights of the visual aesthetic variables. We identified 14 variables, derived from six main variables, as multiple visual aesthetic variables for permanent urban forest reserves based on the content of photos taken by 12 public participants. The expert survey confirmed the validity of the classification of the variables and the importance of their linear sequencing. It was revealed that the greatest weight normalization (W = 10) was achieved from the variables “openness with city view”, “uniqueness of water with natural elements”, and “openness with water view”, while the least weight normalization (W = 1) was obtained from the variables “legibility with natural path”, “uniqueness with man-made elements”, and “uniqueness with natural elements”. Our findings provide a foundation for assessing the visual aesthetic quality of permanent urban forest reserves.