基于改进两步移动搜索法的南京市养老机构空间可达性研究

Research on spatial accessibility of elderly care institutions in Nanjing City based on improved two step mobile search method

空间可达性是评价一个城市养老服务设施配置科学性的关键指标之一,精准衡量城市养老机构的空间异质性、合理规划养老公共空间,是实现城市稳定健康发展的重要保障。以南京市为例,基于多源数据构建随机森林模型将南京市2022年常住人口格网化,结合改进的两步移动搜索法进行养老服务设施的可达性分级测算,通过构建养老机构空间自相关探究其空间分异特征。结果表明:南京市养老机构空间可达性整体较好,但区域配置差异明显;主城区和副中心城区的可达性高,城乡结合部和边缘农村区域可达性较差。

Spatial accessibility is one of the key indicators for evaluating the scientific configuration of urban elderly care service facilities.Accurately measuring the spatial heterogeneity of urban elderly care institutions and planning public spaces for elderly care is an important guarantee for achieving stable and healthy urban development.Taking Nanjing as an example,a random forest model was constructed based on multi-source data to grid the resident population in Nanjing in 2022.The improved two-step mobile search method was used to calculate the accessibility classification of elderly care service facilities.The spatial autocorrelation of elderly care institutions was constructed to explore their spatial differentiation characteristics.The results indicate that the overall accessibility of elderly care institutions in Nanjing is good,but there are significant differences in regional allocation.The accessibility of the main urban area and sub central urban area is high,while the accessibility of the urban-rural fringe and peripheral rural areas is poor.