title: An Enhanced Variable Two-Step Floating Catchment Area Method for Measuring Spatial Accessibility to Residential Care Facilities in Nanjing.
abstract: Civil administration departments require reliable measures of accessibility so that residential care facility shortage areas can be accurately identified. Building on previous research, this paper proposes an enhanced variable two-step floating catchment area (EV2SFCA) method that determines facility catchment sizes by dynamically summing the population around the facility until the facility-to-population ratio (FPR) is less than the FPR threshold (FPRT). To minimize the errors from the supply and demand catchments being mismatched, this paper proposes that the facility and population catchment areas must both contain the other location in calculating accessibility. A case study evaluating spatial accessibility to residential care facilities in Nanjing demonstrates that the proposed method is effective in accurately determining catchment sizes and identifying details in the variation of spatial accessibility. The proposed method can be easily applied to assess other public healthcare facilities, and can provide guidance to government departments on issues of spatial planning and identification of shortage and excess areas.
authors.affiliation: Department of Geographic Information Science, Nanjing University, Nanjing 210093, China. neejianhua@126.com.|Department of Resources Environment and Tourism Management, West Anhui University, Anhui Luan 237012, China. neejianhua@126.com.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Ni
authors.affiliation: Department of Geographic Information Science, Nanjing University, Nanjing 210093, China. jywang0301@163.com.
authors.forename: Jinyin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Geographic Information Science, Nanjing University, Nanjing 210093, China. ruiyikang@gmail.com.|Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing 210093, China. ruiyikang@gmail.com.
authors.forename: Yikang
authors.initials: Y
authors.lastname: Rui
authors.affiliation: Department of Geographic Information Science, Nanjing University, Nanjing 210093, China. qiantianlu_nju@126.com.
authors.forename: Tianlu
authors.initials: T
authors.lastname: Qian
authors.affiliation: Department of Geographic Information Science, Nanjing University, Nanjing 210093, China. wangjiechen@nju.edu.cn.|Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing 210093, China. wangjiechen@nju.edu.cn.|Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China. wangjiechen@nju.edu.cn.
authors.forename: Jiechen
authors.initials: J
authors.lastname: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002391:Catchment Area, Health; D002681:China; D005260:Female; D006297:Health Services Accessibility / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D012112:Residential Facilities / Q000600:supply & distribution*
keywords: catchment size; residential care facility; spatial accessibility; two-step floating catchment area (2FCA) method