{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T05:38:19Z","timestamp":1773812299108,"version":"3.50.1"},"reference-count":66,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2023,7,20]],"date-time":"2023-07-20T00:00:00Z","timestamp":1689811200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China (NSFC)","doi-asserted-by":"publisher","award":["42071399"],"award-info":[{"award-number":["42071399"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China (NSFC)","doi-asserted-by":"publisher","award":["GDNRC[2022]21"],"award-info":[{"award-number":["GDNRC[2022]21"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Marine Economy Development Foundation of Guangdong Province","award":["42071399"],"award-info":[{"award-number":["42071399"]}]},{"name":"Marine Economy Development Foundation of Guangdong Province","award":["GDNRC[2022]21"],"award-info":[{"award-number":["GDNRC[2022]21"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>Spatial equality of medical services refers to equal access to medical services in all regions. Currently, research on medical facility planning focuses mainly on efficiency, and less on methods for achieving medical facility access equality. In this study, we propose a medical service equality optimization method considering facility grade and Gaode actual travel time data. First, we use the maximum coverage location problem (MCLP) model to locate new medical facilities. Then, we incorporate a service capacity weight matrix reflecting medical facility grade into the quadratic programming (QP) model, with the objective of optimizing the bed configuration of each facility to maximize the spatial equality of medical accessibility. By measuring and optimizing medical accessibility in Guangzhou under different travel time thresholds, we analyzed the optimization results of central, peripheral, and edge areas. The results show that (1) the model significantly improves the spatial equality of medical accessibility. After optimization, fewer locations have very low (or low) and very high (or high) accessibility, while more locations have moderate accessibility. When the travel time threshold is 22 min, the number of locations with medium accessibility level increases by about 18.86%. (2) The higher the travel time threshold, the greater is the overall optimization effect. (3) Different regions have different optimization effects and a larger travel time threshold can improve the optimization effect of the peripheral areas more significantly. It is recommended that new medical facilities be built in the peripheral and edge areas, along with improvements to the transport system.<\/jats:p>","DOI":"10.3390\/ijgi12070292","type":"journal-article","created":{"date-parts":[[2023,7,21]],"date-time":"2023-07-21T01:58:38Z","timestamp":1689904718000},"page":"292","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["An Optimization Method for Equalizing the Spatial Accessibility of Medical Services in Guangzhou"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-6221-0798","authenticated-orcid":false,"given":"Mingkai","family":"Yu","sequence":"first","affiliation":[{"name":"School of Geography, South China Normal University, Guangzhou 510631, China"}]},{"given":"Yingchun","family":"Fu","sequence":"additional","affiliation":[{"name":"School of Geography, South China Normal University, Guangzhou 510631, China"}]},{"given":"Wenkai","family":"Liu","sequence":"additional","affiliation":[{"name":"Beidou Research Institute, Faculty of Engineering, South China Normal University, Guangzhou 510631, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"767","DOI":"10.2747\/1539-7216.51.6.767","article-title":"A Spatial-Temporal Analysis of Health Care and Mortality Inequalities in China","volume":"51","author":"Li","year":"2010","journal-title":"Eurasian Geogr. Econ."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"418","DOI":"10.1177\/0020731419893058","article-title":"Distribution of Health Care Resources in Austria\u2013Inequality Assessment of Different Health Care Resources at Different Points in Time","volume":"50","author":"Reichmann","year":"2020","journal-title":"Int. J. Health Serv."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"478","DOI":"10.1080\/00343404.2018.1462481","article-title":"Spatial Inequality in Access to Healthcare: Evidence from an Italian Alpine Region","volume":"53","author":"Perucca","year":"2019","journal-title":"Reg. Stud."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"602","DOI":"10.1111\/tgis.12333","article-title":"Mapping the Spatial Disparities in Urban Health Care Services Using Taxi Trajectories Data","volume":"22","author":"Chen","year":"2018","journal-title":"Trans. GIS"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Ruktanonchai, C., Nilsen, K., Alegana, V., Bosco, C., Ayiko, R., Seven Kajeguka, A., Matthews, Z., and Tatem, A. (2018). Temporal Trends in Spatial Inequalities of Maternal and Newborn Health Services among Four East African Countries, 1999\u20132015. BMC Public Health, 18.","DOI":"10.1186\/s12889-018-6241-8"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1261","DOI":"10.1007\/s11205-022-02877-x","article-title":"An Integrated Analysis of Social, Economic, and Environmental Indicators\u2019 Effects on Public Health and Health Inequality Globally: From the Perspective of Vulnerability","volume":"162","author":"Yang","year":"2022","journal-title":"Soc. Indic. Res."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"102644","DOI":"10.1016\/j.apgeog.2022.102644","article-title":"Associations between Spatial Access to Medical Facilities and Health-Seeking Behaviors: A Mixed Geographically Weighted Regression Analysis in Shanghai, China","volume":"139","author":"Shen","year":"2022","journal-title":"Appl. Geogr."},{"key":"ref_8","first-page":"568","article-title":"Mapping the Inequalities of Medical Resource Provision in China","volume":"7","author":"Liu","year":"2020","journal-title":"Reg. Stud. Reg. Sci."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.ejor.2018.02.055","article-title":"Recent Optimization Models and Trends in Location, Relocation, and Dispatching of Emergency Medical Vehicles","volume":"272","author":"Ruiz","year":"2019","journal-title":"Eur. J. Oper. Res."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1016\/j.cor.2016.09.016","article-title":"Emergency Medical Services and beyond: Addressing New Challenges through a Wide Literature Review","volume":"78","author":"Aringhieri","year":"2017","journal-title":"Comput. Oper. Res."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"101205","DOI":"10.1016\/j.ijdrr.2019.101205","article-title":"Allocation of Emergency Response Centres in Response to Pluvial Flooding-Prone Demand Points Using Integrated Multiple Layer Perceptron and Maximum Coverage Location Problem Models","volume":"38","author":"Rizeei","year":"2019","journal-title":"Int. J. Disaster Risk Reduct."},{"key":"ref_12","first-page":"25","article-title":"Why Inequality Matters","volume":"Volume 15","author":"Krugman","year":"2013","journal-title":"New York Times"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1363","DOI":"10.1287\/opre.19.6.1363","article-title":"The Location of Emergency Service Facilities","volume":"19","author":"Toregas","year":"1971","journal-title":"Oper. Res."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1007\/BF01942293","article-title":"The Maximal Covering Location Problem","volume":"32","author":"Church","year":"1974","journal-title":"Pap. Reg. Sci. Assoc."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"955","DOI":"10.1287\/opre.16.5.955","article-title":"Heuristic Methods for Estimating the Generalized Vertex Median of a Weighted Graph","volume":"16","author":"Teitz","year":"1968","journal-title":"Oper. Res."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1016\/S0966-8349(97)00015-6","article-title":"Solving an Ambulance Location Model by Tabu Search","volume":"5","author":"Gendreau","year":"1997","journal-title":"Location Sci."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1287\/trsc.17.1.48","article-title":"A Maximum Expected Covering Location Model: Formulation, Properties and Heuristic Solution","volume":"17","author":"Daskin","year":"1983","journal-title":"Transp. Sci."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"192","DOI":"10.1287\/trsc.23.3.192","article-title":"The Maximum Availability Location Problem","volume":"23","author":"ReVelle","year":"1989","journal-title":"Transp. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"814","DOI":"10.1016\/j.cor.2006.04.003","article-title":"A Multiperiod Set Covering Location Model for Dynamic Redeployment of Ambulances","volume":"35","author":"Rajagopalan","year":"2008","journal-title":"Comput. Oper. Res."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1068\/b37096","article-title":"Planning toward Equal Accessibility to Services: A Quadratic Programming Approach","volume":"40","author":"Wang","year":"2013","journal-title":"Environ. Plan. B-Plan. Des."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"270","DOI":"10.1177\/1355819619837292","article-title":"How Can the Spatial Equity of Health Services Be Defined and Measured? A Systematic Review of Spatial Equity Definitions and Methods","volume":"24","author":"Whitehead","year":"2019","journal-title":"J. Health Serv. Res. Policy"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1016\/j.cities.2015.12.007","article-title":"Is Inequality in the Distribution of Urban Facilities Inequitable? Exploring a Method for Identifying Spatial Inequity in an Iranian City","volume":"52","author":"Dadashpoor","year":"2016","journal-title":"Cities"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"276","DOI":"10.1016\/j.compenvurbsys.2011.02.005","article-title":"The Impact of Opening Hours on the Equity of Individual Space\u2013Time Accessibility","volume":"35","author":"Delafontaine","year":"2011","journal-title":"Comput. Environ. Urban Syst."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Liu, L., Yu, H., Zhao, J., Wu, H., Peng, Z., and Wang, R. (2022). Multiscale Effects of Multimodal Public Facilities Accessibility on Housing Prices Based on MGWR: A Case Study of Wuhan, China. ISPRS Int. J. Geo-Inf., 11.","DOI":"10.3390\/ijgi11010057"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"102583","DOI":"10.1016\/j.apgeog.2021.102583","article-title":"Geographical Accessibility to Primary Health Care in Finland\u2013Grid-Based Multimodal Assessment","volume":"136","author":"Kotavaara","year":"2021","journal-title":"Appl. Geogr."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"106778","DOI":"10.1016\/j.envint.2021.106778","article-title":"Observed inequality in urban greenspace exposure in China","volume":"156","author":"Song","year":"2021","journal-title":"Environ. Int."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"103369","DOI":"10.1016\/j.jtrangeo.2022.103369","article-title":"A Hierarchical Two-Step Floating Catchment Area Analysis for High-Tier Hospital Accessibility in an Urban Agglomeration Region","volume":"102","author":"Li","year":"2022","journal-title":"J. Transp. Geogr."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1104","DOI":"10.1080\/00045608.2012.657146","article-title":"Measurement, Optimization, and Impact of Health Care Accessibility: A Methodological Review","volume":"102","author":"Wang","year":"2012","journal-title":"Ann. Assoc. Am. Geogr."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1186\/1476-072X-3-3","article-title":"Spatial Accessibility of Primary Care: Concepts, Methods and Challenges","volume":"3","author":"Guagliardo","year":"2004","journal-title":"Int. J. Health Geogr."},{"key":"ref_30","unstructured":"Srinivasan, N., and Sathisan, S.K. (1998). Transportation, Land Use, and Air Quality: Making the Connection, American Society of Civil Engineers."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"102706","DOI":"10.1016\/j.jtrangeo.2020.102706","article-title":"Measuring the Accessibility and Spatial Equity of Urban Services under Competition Using the Cumulative Opportunities Measure","volume":"85","author":"Kelobonye","year":"2020","journal-title":"J. Transp. Geogr."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"102924","DOI":"10.1016\/j.jtrangeo.2020.102924","article-title":"Balancing Time: Using a New Accessibility Measure in Rio de Janeiro","volume":"90","author":"Barboza","year":"2021","journal-title":"J. Transp. Geogr."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1016\/j.habitatint.2017.03.010","article-title":"Spatial Effects of Accessibility to Parks on Housing Prices in Shenzhen, China","volume":"63","author":"Wu","year":"2017","journal-title":"Habitat Int."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/j.retrec.2014.09.005","article-title":"A Regional Model of Road Accessibility in Mexico: Accessibility Surfaces and Robustness Analysis","volume":"46","author":"Santos","year":"2014","journal-title":"Res. Transp. Econ."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Ding, Z., Dong, H., Yang, L., Xue, N., He, L., and Yao, X. (2022). A Study on the Emergency Shelter Spatial Accessibility Based on the Adaptive Catchment Size 2SFCA Method. ISPRS Int. J. Geo-Inf., 11.","DOI":"10.3390\/ijgi11120593"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1016\/j.apgeog.2014.08.005","article-title":"Measuring spatial accessibility to primary health care services: Utilising dynamic catchment sizes","volume":"54","author":"McGrail","year":"2014","journal-title":"Appl. Geogr."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"108","DOI":"10.1080\/17538947.2021.2014578","article-title":"Evaluating spatial accessibility to healthcare services from the lens of emergency hospital visits based on floating car data","volume":"15","author":"Jiao","year":"2022","journal-title":"Int. J. Digit. Earth"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1584","DOI":"10.3390\/ijgi4031584","article-title":"Spatio-Temporal Analysis of Spatial Accessibility to Primary Health Care in Bhutan","volume":"4","author":"Jamtsho","year":"2015","journal-title":"ISPRS Int. J. Geo-Inf."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Kaur Khakh, A., Fast, V., and Shahid, R. (2019). Spatial Accessibility to Primary Healthcare Services by Multimodal Means of Travel: Synthesis and Case Study in the City of Calgary. Int. J. Environ. Res. Public Health, 16.","DOI":"10.3390\/ijerph16020170"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Zhou, X., Yu, Z., Yuan, L., Wang, L., and Wu, C. (2020). Measuring Accessibility of Healthcare Facilities for Populations with Multiple Transportation Modes Considering Residential Transportation Mode Choice. ISPRS Int. J. Geo-Inf., 9.","DOI":"10.3390\/ijgi9060394"},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Liu, L., Zhao, Y., Lyu, H., Chen, S., Tu, Y., and Huang, S. (2023). Spatial Accessibility and Equity Evaluation of Medical Facilities Based on Improved 2SFCA: A Case Study in Xi\u2019an, China. Int. J. Environ. Res. Public Health, 20.","DOI":"10.3390\/ijerph20032076"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"101531","DOI":"10.1016\/j.jth.2022.101531","article-title":"Time-varying spatial accessibility of primary healthcare services based on spatiotemporal variations in demand, supply, and traffic conditions: A case study of Seoul, South Korea","volume":"27","author":"Kim","year":"2022","journal-title":"J. Transp. Health"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1016\/j.apgeog.2018.01.011","article-title":"Inequality of Public Health and Its Role in Spatial Accessibility to Medical Facilities in China","volume":"92","author":"Yin","year":"2018","journal-title":"Appl. Geogr."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"112386","DOI":"10.1016\/j.socscimed.2019.112386","article-title":"Impact of China\u2019s Referral Reform on the Equity and Spatial Accessibility of Healthcare Resources: A Case Study of Beijing","volume":"235","author":"Lu","year":"2019","journal-title":"Soc. Sci. Med."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"104130","DOI":"10.1016\/j.scs.2022.104130","article-title":"The Impact of Traffic on Equality of Urban Healthcare Service Accessibility: A Case Study in Wuhan, China","volume":"86","author":"Xia","year":"2022","journal-title":"Sust. Cities Soc."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Tao, Z., and Han, W. (2021). Assessing the Impacts of Hierarchical Healthcare System on the Accessibility and Spatial Equality of Healthcare Services in Shenzhen, China. ISPRS Int. J. Geo-Inf., 10.","DOI":"10.3390\/ijgi10090615"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"102794","DOI":"10.1016\/j.jtrangeo.2020.102794","article-title":"Evaluating Spatial Accessibility to Healthcare Services under Travel Time Uncertainty: A Reliability-Based Floating Catchment Area Approach","volume":"87","author":"Chen","year":"2020","journal-title":"J. Transp. Geogr."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/j.jtrangeo.2017.08.012","article-title":"Public Transport and School Location Impacts on Educational Inequalities: Insights from S\u00e3o Paulo","volume":"67","author":"Lovelace","year":"2018","journal-title":"J. Transp. Geogr."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"103919","DOI":"10.1016\/j.landurbplan.2020.103919","article-title":"Which Communities Have Better Accessibility to Green Space? An Investigation into Environmental Inequality Using Big Data","volume":"204","author":"Chen","year":"2020","journal-title":"Landsc. Urban Plan."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"121454","DOI":"10.1016\/j.jclepro.2020.121454","article-title":"Will the Opening Community Policy Improve the Equity of Green Accessibility and in What Ways?\u2014Response Based on a 2-Step Floating Catchment Area Method and Genetic Algorithm","volume":"263","author":"Wu","year":"2020","journal-title":"J. Clean. Prod."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"103016","DOI":"10.1016\/j.cities.2020.103016","article-title":"Inequalities in Transit Accessibility: Contributions from a Comparative Study between Global South and North Metropolitan Regions","volume":"109","author":"Giannotti","year":"2021","journal-title":"Cities"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1016\/j.apgeog.2018.08.009","article-title":"Improving the Measurement of the Korean Emergency Medical System\u2019s Spatial Accessibility","volume":"100","author":"Shin","year":"2018","journal-title":"Appl. Geogr."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"101745","DOI":"10.1016\/j.compenvurbsys.2021.101745","article-title":"Equalizing the Spatial Accessibility of Emergency Medical Services in Shanghai: A Trade-off Perspective","volume":"92","author":"Li","year":"2022","journal-title":"Comput. Environ. Urban Syst."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1186\/1476-072X-13-33","article-title":"Spatial Optimization of Residential Care Facility Locations in Beijing, China: Maximum Equity in Accessibility","volume":"13","author":"Tao","year":"2014","journal-title":"Int. J. Health Geogr."},{"key":"ref_55","doi-asserted-by":"crossref","unstructured":"Tao, Z., Wang, Q., and Han, W. (2021). Towards Health Equality: Optimizing Hierarchical Healthcare Facilities towards Maximal Accessibility Equality in Shenzhen, China. Appl. Sci., 11.","DOI":"10.3390\/app112110282"},{"key":"ref_56","first-page":"105","article-title":"Spatial Decompositions, Modeling and Mapping Service Regions to Predict Access to Social Programs","volume":"6","author":"Radke","year":"2000","journal-title":"Geogr. Inf. Sci."},{"key":"ref_57","first-page":"589","article-title":"Research Progress of the Two-Step Floating Catchment Area Method and Extensions","volume":"35","author":"Tao","year":"2016","journal-title":"Prog. Geogr."},{"key":"ref_58","doi-asserted-by":"crossref","unstructured":"Zhu, X., Tong, Z., Liu, X., Li, X., Lin, P., and Wang, T. (2018). An Improved Two-Step Floating Catchment Area Method for Evaluating Spatial Accessibility to Urban Emergency Shelters. Sustainability, 10.","DOI":"10.3390\/su10072180"},{"key":"ref_59","doi-asserted-by":"crossref","unstructured":"Wang, K., Bai, J., and Dang, X. (2021). Spatial Difference and Equity Analysis for Accessibility to Three-Level Medical Services Based on Actual Medical Behavior in Shaanxi, China. Int. J. Environ. Res. Public Health, 18.","DOI":"10.3390\/ijerph18010112"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"333","DOI":"10.1038\/nature25181","article-title":"A Global Map of Travel Time to Cities to Assess Inequalities in Accessibility in 2015","volume":"553","author":"Weiss","year":"2018","journal-title":"Nature"},{"key":"ref_61","doi-asserted-by":"crossref","unstructured":"Niu, Q., Wang, Y., Xia, Y., Wu, H., and Tang, X. (2018). Detailed Assessment of the Spatial Distribution of Urban Parks According to Day and Travel Mode Based on Web Mapping API: A Case Study of Main Parks in Wuhan. Int. J. Environ. Res. Public Health, 15.","DOI":"10.3390\/ijerph15081725"},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"103642","DOI":"10.1016\/j.landurbplan.2019.103642","article-title":"Accessibility to Urban Parks for Elderly Residents: Perspectives from Mobile Phone Data","volume":"191","author":"Guo","year":"2019","journal-title":"Landsc. Urban Plan."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"1504","DOI":"10.1111\/tgis.12737","article-title":"Evaluating Healthcare Resource Inequality in Beijing, China Based on an Improved Spatial Accessibility Measurement","volume":"25","author":"Gong","year":"2021","journal-title":"Trans. GIS"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1080\/19475683.2019.1641553","article-title":"Examination of Spatial Accessibility at Micro-and Macro-Levels Using the Enhanced Two-Step Floating Catchment Area (E2SFCA) Method","volume":"25","author":"Bryant","year":"2019","journal-title":"Ann. GIS"},{"key":"ref_65","doi-asserted-by":"crossref","unstructured":"Wang, Y., Huang, C., Zhao, M., Hou, J., Zhang, Y., and Gu, J. (2020). Mapping the Population Density in Mainland China Using NPP\/VIIRS and Points-of-Interest Data Based on a Random Forests Model. Remote Sens., 12.","DOI":"10.3390\/rs12213645"},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"103314","DOI":"10.1016\/j.cities.2021.103314","article-title":"Measuring Emergency Medical Service (EMS) Accessibility with the Effect of City Dynamics in a 100-Year Pluvial Flood Scenario","volume":"117","author":"Li","year":"2021","journal-title":"Cities"}],"container-title":["ISPRS International Journal of Geo-Information"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2220-9964\/12\/7\/292\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T20:15:56Z","timestamp":1760127356000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2220-9964\/12\/7\/292"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,7,20]]},"references-count":66,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2023,7]]}},"alternative-id":["ijgi12070292"],"URL":"https:\/\/doi.org\/10.3390\/ijgi12070292","relation":{},"ISSN":["2220-9964"],"issn-type":[{"value":"2220-9964","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,7,20]]}}}