“…Accessibility assessment is one of the main methods of research on the rationality of the spatial distribution [26][27][28], which is widely used in the layout evaluation of public service facilities, such as education, medical treatment, elderly care facilities, parks, and green spaces [29,30]. Countries that also face serious aging problems, such as Japan [31,32], South Korea [33], Finland [34], and the United States [35,36], have also attracted extensive attention from scholars to study the accessibility of public service facilities. With the development of new urban science, multi-source data provide important support for evaluating the accessibility of elderly care facilities [37], such as POI (point of interest) [38][39][40], street-view images [41][42][43][44], smart cards [45], and mobile phones [46].…”