A Study on the Quality Measurement of the 15-Minute Community Life Circle Based on Multisource Data in Qingdao

With the shift of urbanization from large-scale expansion to high-quality transformation, the 15-minute community life circle (15-minute CLC) has emerged as a significant research focus. Enhancing the quality of 15-minute CLCs has become a critical issue requiring immediate attention. Based on the humanistic perspective, this study systematically analyzes the concept of 15-minute CLC and deeply analyzes the actual demands of residents. In this way, it constructs a 15-minute CLC quality measurement system covering three dimensions: public service facility allocation, public space quality, and pedestrian environment quality. The study takes the central area of Qingdao as the research object. It uses GIS spatial analysis, big data mining, and deep learning to measure the quality of 25 15-minute CLCs in the study area. The results reveal significant spatial heterogeneity in quality metrics across different 15-minute CLCs. This study advances a scientific approach to measuring 15-minute CLC quality and provides evidence-based decision support for targeted urban renewal strategies. Its findings hold substantial practical implications for fostering high-quality 15-minute CLC development.