Visual Quality Evaluation of Historic and Cultural City Landscapes: A Case Study of the Tai’erzhuang Ancient City

As a World Cultural Heritage site, the Beijing–Hangzhou Grand Canal is lined with historic and cultural cities that bear abundant historical and cultural connotations. It is of vital importance to address the issues of landscape homogenization, the disconnect between conservation measures and public needs, and other related challenges in the development of these cities. This study adopts a mixed-methods approach combining qualitative and quantitative research. By integrating subjective landscape evaluation with eye tracking analysis, the ancient city of Taierzhuang along the Beijing–Hangzhou Grand Canal was selected as the research subject to conduct an in-depth investigation into the visual experience and preferences for different types of landscapes in this area. The study yielded the following findings: There are significant differences in visual experiences among various types of landscapes in Taierzhuang Ancient City. Among them, participants exhibited the highest level of attention toward canal landscapes and the lowest toward heritage site landscapes. In terms of visual distribution differences, eye tracking heatmaps revealed that attention was primarily concentrated on architectural structures and water surface reflections. In the subjective evaluation analysis, canal cultural landscapes received the highest comprehensive score (4.39 points), followed by historical architectural landscapes (4.02 points), historical street landscapes (3.93 points), modern commemorative landscapes (3.72 points), and heritage site landscapes (3.69 points). Additionally, a significant correlation was found between eye tracking data and subjective evaluation results, validating the scientifically effective relationship between subjective assessments of historical cultural landscapes and eye tracking analysis. The findings of this study not only provide a scientific basis for landscape improvement and optimization in other canal-related historical and cultural cities but also offer new research methods and perspectives for the protection and development of other heritage landscapes.