{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T20:24:16Z","timestamp":1773951856682,"version":"3.50.1"},"reference-count":65,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2019,7,23]],"date-time":"2019-07-23T00:00:00Z","timestamp":1563840000000},"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","doi-asserted-by":"publisher","award":["41701160"],"award-info":[{"award-number":["41701160"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Key Laboratory of Spatial Data Mining &amp; Information Sharing of Ministry of Education, Fuzhou University","award":["2019LSDMIS03"],"award-info":[{"award-number":["2019LSDMIS03"]}]},{"DOI":"10.13039\/501100012246","name":"Priority Academic Program Development of Jiangsu Higher Education Institutions","doi-asserted-by":"publisher","award":["164320H116"],"award-info":[{"award-number":["164320H116"]}],"id":[{"id":"10.13039\/501100012246","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.mdpi.com"],"crossmark-restriction":true},"short-container-title":["IJGI"],"abstract":"<jats:p>At present, population mobility for the purpose of tourism has become a popular phenomenon. As it becomes easier to capture big data on the tourist digital footprint, it is possible to analyze the respective regional features and driving forces for both tourism sources and destination regions at a macro level. Based on the data of tourist flows to Nanjing on five short-period national holidays in China, this study first calculated the travel rate of tourist source regions (315 cities) and the geographical concentration index of the visited attractions (51 scenic spots). Then, the spatial autocorrelation metrics index was used to analyze the global autocorrelation of the travel rates of tourist source regions and the geographical concentration index of the tourist destinations on five short-term national holidays. Finally, a heuristic unsupervised machine-learning method was used to analyze and map tourist sources and visited attractions by adopting the travel rate and the geographical concentration index accordingly as regionalized variables. The results indicate that both source and sink regions expressed distinctive regional differentiation patterns in the corresponding regional variables. This study method provides a practical tool for analyzing regionalization of big data in tourist flows, and it can also be applied to other origin-destination (OD) studies.<\/jats:p>","DOI":"10.3390\/ijgi8070314","type":"journal-article","created":{"date-parts":[[2019,7,23]],"date-time":"2019-07-23T10:44:51Z","timestamp":1563878691000},"page":"314","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Regionalization Analysis and Mapping for the Source and Sink of Tourist Flows"],"prefix":"10.3390","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7367-7037","authenticated-orcid":false,"given":"Qiushi","family":"Gu","sequence":"first","affiliation":[{"name":"School of Humanities, Southeast University, Nanjing 210096, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4485-6292","authenticated-orcid":false,"given":"Haiping","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China"},{"name":"Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China"},{"name":"State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing 210023, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8922-8789","authenticated-orcid":false,"given":"Min","family":"Chen","sequence":"additional","affiliation":[{"name":"Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China"},{"name":"Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China"},{"name":"State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing 210023, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chongcheng","family":"Chen","sequence":"additional","affiliation":[{"name":"Key Lab of Spatial Data Mining &amp; Information Sharing, Ministry of Education, Fuzhou University, Fuzhou 350108, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1177\/0309132510366747","article-title":"Tourism geography in china, 1978\u20132008: Whence, what and whither?","volume":"35","author":"Bao","year":"2011","journal-title":"Prog. Hum. Geog."},{"key":"ref_2","first-page":"97","article-title":"The timeshare industry of Africa: A study in tourism geography","volume":"21","author":"Pandy","year":"2013","journal-title":"Bull. Geogr. Socio-Econ. Ser."},{"key":"ref_3","first-page":"38","article-title":"Tourist flow research progress, evaluation and outlook","volume":"28","author":"Youyin","year":"2013","journal-title":"Tour. Trib.\/Lvyou Xuekan"},{"key":"ref_4","first-page":"75","article-title":"The influence of Beijing-Shanghai high-speed railway on tourist flow and time-space distribution","volume":"29","author":"Degen","year":"2014","journal-title":"Tour. Trib.\/Lvyou Xuekan"},{"key":"ref_5","first-page":"79","article-title":"A couple analysis of the extraversion online tourism information, inbound tourist flow: A case of the American, Canadian inbound tourist flow","volume":"29","author":"Feng","year":"2014","journal-title":"Tour. Trib."},{"key":"ref_6","first-page":"1","article-title":"Exploratory analysis of Hunan tourist flow agglomeration and diffusion based on traffic network","volume":"3","author":"Xi","year":"2014","journal-title":"Areal Res. Dev."},{"key":"ref_7","first-page":"198","article-title":"Big data analytics for knowledge generation in tourism destinations\u2014A case from Sweden","volume":"3","author":"Fuchs","year":"2014","journal-title":"J. Destin. Mark. Manag."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Irudeen, R., and Samaraweera, S. (2013, January 11\u201315). Big data solution for Sri Lankan development: A case study from travel and tourism. Proceedings of the 2013 International Conference on Advances in ICT for Emerging Regions (ICTer), Colombo, Sri Lanka.","DOI":"10.1109\/ICTer.2013.6761180"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Xiang, Z., and Fesenmaier, D.R. (2017). Big data analytics, tourism design and smart tourism. Analytics in Smart Tourism Design, Springer.","DOI":"10.1007\/978-3-319-44263-1"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1016\/j.tourman.2018.03.009","article-title":"Big data in tourism research: A literature review","volume":"68","author":"Li","year":"2018","journal-title":"Tour. Manag."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"905","DOI":"10.1016\/j.annals.2004.07.012","article-title":"Testing theory of planned versus realized tourism behavior","volume":"32","author":"March","year":"2005","journal-title":"Ann. Tour. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1080\/09669582.2014.912219","article-title":"Sustainable urban tourism: Understanding and developing visitor pro-environmental behaviours","volume":"23","author":"Miller","year":"2015","journal-title":"J. Sustain. Tour."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"785","DOI":"10.1016\/j.jbusres.2010.10.008","article-title":"General theory of cultures\u2019 consequences on international tourism behavior","volume":"64","author":"Woodside","year":"2011","journal-title":"J. Bus. Res."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"609","DOI":"10.1016\/j.tourman.2008.01.005","article-title":"Progress in information technology and tourism management: 20 years on and 10 years after the internet\u2014The state of Etourism research","volume":"29","author":"Buhalis","year":"2008","journal-title":"Tour. Manag."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"571","DOI":"10.1016\/j.annals.2004.08.004","article-title":"Weather, climate and tourism\u2014A geographical perspective","volume":"32","author":"Martin","year":"2005","journal-title":"Ann. Tour. Res."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"125","DOI":"10.1016\/j.jairtraman.2016.10.006","article-title":"Travel and tourism competitiveness index: The impact of air transportation, railways transportation, travel and transport services on international inbound and outbound tourism","volume":"58","author":"Khan","year":"2017","journal-title":"J. Air. Transp. Manag."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"603","DOI":"10.5367\/000000006779319963","article-title":"Income and expenditure in the tourism industry: Time series evidence from Cyprus","volume":"12","author":"Louca","year":"2006","journal-title":"Tour. Econ."},{"key":"ref_18","first-page":"103","article-title":"Research on income difference between urban and rural inhabitants during tourism development in zhangjiajie","volume":"3","author":"Min","year":"2011","journal-title":"J. Jishou Univ. Nat. Sci. Ed."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1177\/1468797606071477","article-title":"Media representation of the UK as a destination for Japanese tourists: Popular culture and tourism","volume":"6","author":"Iwashita","year":"2006","journal-title":"Tour. Stud."},{"key":"ref_20","first-page":"220","article-title":"A sense of place: Place, culture and tourism","volume":"40","author":"Smith","year":"2015","journal-title":"Tour. Recreat. Res."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"012057","DOI":"10.1088\/1742-6596\/953\/1\/012057","article-title":"Sustainable tourism and harmonious culture: A case study of cultic model at village tourism","volume":"953","author":"Astawa","year":"2018","journal-title":"J. Phys. Conf. Ser."},{"key":"ref_22","first-page":"1041","article-title":"The network structure of cross-border tourism flow based on the social network method: A case of Lugu lake region","volume":"34","author":"Hongsong","year":"2014","journal-title":"Sci. Geogr. Sin."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1108\/eb057683","article-title":"A model of tourism flow into the pacific","volume":"28","author":"Crampon","year":"1973","journal-title":"Tour. Rev."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"2718","DOI":"10.1016\/j.biocon.2009.06.024","article-title":"Community, lions, livestock and money: A spatial and social analysis of attitudes to wildlife and the conservation value of tourism in a human-carnivore conflict in botswana","volume":"142","author":"Hemson","year":"2009","journal-title":"Biol. Conserv."},{"key":"ref_25","first-page":"225","article-title":"Studying the influence of tourism flow on foreign exchange rate by iabc and time-series models","volume":"Volume 81","author":"Tsai","year":"2018","journal-title":"Advances in Intelligent Information Hiding and Multimedia Signal Processing, Pt I"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1002\/jtr.1932","article-title":"Exploratory space-time analysis of inbound tourism flows to china cities","volume":"16","author":"Yang","year":"2014","journal-title":"Int. J. Tour. Res."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1177\/0047287506292700","article-title":"A behavioral assessment of tourism transportation options for reducing energy consumption and greenhouse gases","volume":"45","author":"Kelly","year":"2007","journal-title":"J. Travel Res."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1016\/j.jairtraman.2005.09.007","article-title":"Air transport and tourism\u2014Perspectives and challenges for destinations, airlines and governments","volume":"12","author":"Bieger","year":"2006","journal-title":"J. Air Transp. Manag."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1177\/0047287509355327","article-title":"Global economic crisis and tourism: Consequences and perspectives","volume":"49","author":"Papatheodorou","year":"2010","journal-title":"J. Travel Res."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Klabbers, M., and Timmermans, H. (1999). Measuring tourism consumer behaviour using escape: A multimedia interview engine for stated choice and preference experiments. Information and Communication Technologies in Tourism 1999, Springer.","DOI":"10.1007\/978-3-7091-6373-3_18"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"971","DOI":"10.1080\/00224499.2017.1304519","article-title":"Unintentional misreporting on self-report measures of sexually aggressive behavior: An interview study","volume":"54","author":"Strang","year":"2017","journal-title":"J. Sex Res."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Kawase, J., Kurata, Y., and Yabe, N. (2012, January 25\u201327). When and where tourists are viewing exhibitions: Toward sophistication of GPS-assisted tourist activity surveys. Proceedings of the Information and Communication Technologies in Tourism 2012, Helsingborg, Sweden.","DOI":"10.1007\/978-3-7091-1142-0_36"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1016\/j.tourman.2016.08.009","article-title":"Understanding the tourist mobility using GPS: Where is the next place?","volume":"59","author":"Zheng","year":"2017","journal-title":"Tour. Manag."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"203","DOI":"10.1080\/19475683.2017.1340340","article-title":"Post-processing GPS-tracks in reconstructing travelled routes in a GIS-environment: Network subset selection and attribute adjustment","volume":"23","author":"Dijk","year":"2017","journal-title":"Ann. GIS"},{"key":"ref_35","first-page":"71","article-title":"Study on region difference of tourism development in Guangdong province based on spatial statistical analysis","volume":"29","author":"Li","year":"2016","journal-title":"J. Xinyang Norm. Univ. Nat. Sci. Ed."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1016\/j.ijhm.2014.11.005","article-title":"A spatial-temporal analysis of hotels in urban tourism destination","volume":"45","author":"Li","year":"2015","journal-title":"Int. J. Hosp. Manag."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1080\/21568316.2014.890127","article-title":"A spatial analysis of tourism, entrepreneurship and the entrepreneurial ecosystem in North Carolina, USA","volume":"11","author":"Kline","year":"2014","journal-title":"Tour. Plan. Dev."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.annals.2014.05.008","article-title":"Gravity models for tourism demand: Theory and use","volume":"48","author":"Morley","year":"2014","journal-title":"Ann. Tour. Res."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"802","DOI":"10.1016\/j.annals.2010.02.008","article-title":"Network science a review focused on tourism","volume":"37","author":"Baggio","year":"2010","journal-title":"Ann. Tour. Res."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Zhang, H.P., Zhou, X.X., Gu, X., Zhou, L., Ji, G.L., and Tang, G.A. (2018). Method for the analysis and visualization of similar flow hotspot patterns between different regional groups. ISPRS Int. J. Geo-Inf., 7.","DOI":"10.20944\/preprints201807.0063.v1"},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Wang, H., Huang, H., Ni, X., and Zeng, W. (2019). Revealing spatial-temporal characteristics and patterns of urban travel: A large-scale analysis and visualization study with taxi GPS data. ISPRS Int. J. Geo-Inf., 8.","DOI":"10.3390\/ijgi8060257"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"67795","DOI":"10.1109\/ACCESS.2019.2917286","article-title":"A method to mine movement patterns between zones: A case study of subway commuters in Shanghai","volume":"7","author":"Zhou","year":"2019","journal-title":"IEEE Access"},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Agiomirgianakis, G., Serenis, D., and Tsounis, N. (2017). Short-and long-run determinants of tourist flows: The case of South Korea. Advances in Applied Economic Research, Springer.","DOI":"10.1007\/978-3-319-48454-9_58"},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Han, Y., Wang, S., Ren, Y., Wang, C., Gao, P., and Chen, G. (2019). Predicting station-level short-term passenger flow in a citywide metro network using spatiotemporal graph convolutional neural networks. ISPRS Int. J. Geo-Inf., 8.","DOI":"10.3390\/ijgi8060243"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"210","DOI":"10.1002\/atr.1292","article-title":"A kalman filter approach to dynamic od flow estimation for urban road networks using multi-sensor data","volume":"49","author":"Lu","year":"2015","journal-title":"J. Adv. Transport."},{"key":"ref_46","first-page":"7","article-title":"Passenger flow forecasting based on od-matrix estimation model","volume":"30","author":"Li","year":"2008","journal-title":"J. China Railw. Soc."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"240","DOI":"10.1016\/j.trc.2015.02.018","article-title":"Origin-destination trips by purpose and time of day inferred from mobile phone data","volume":"58","author":"Alexander","year":"2015","journal-title":"Transport. Res. C Emerg. Technol."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1016\/j.im.2016.11.011","article-title":"A big data analytics method for tourist behaviour analysis","volume":"54","author":"Miah","year":"2017","journal-title":"Inf. Manag."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1007\/s11067-007-9059-y","article-title":"A relaxation approach for estimating origin-destination trip tables","volume":"10","author":"Nie","year":"2010","journal-title":"Netw. Spat. Econ."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"196","DOI":"10.1111\/j.1538-4632.1969.tb00615.x","article-title":"Regionalization: Theory and alternative algorithms","volume":"1","author":"Lankford","year":"1969","journal-title":"Geogr Anal."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"90","DOI":"10.1111\/j.1538-4632.2004.tb01127.x","article-title":"Constructing the spatial weights matrix using a local statistic","volume":"36","author":"Getis","year":"2004","journal-title":"Geogr. Anal."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"745","DOI":"10.1093\/jeg\/lbp056","article-title":"Measures of the geographic concentration of industries: Improving distance-based methods","volume":"10","author":"Marcon","year":"2010","journal-title":"J. Econ. Geogr."},{"key":"ref_53","unstructured":"Lewis, D.B. (2010). Elementary statistics for geographers, Guilford Press. [3rd ed.]."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"575","DOI":"10.1016\/S0166-0462(99)00020-4","article-title":"A measure of the geographic concentration in French manufacturing industries","volume":"29","author":"Maurel","year":"2004","journal-title":"Reg. Sci. Urban Econ."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"745","DOI":"10.1002\/joc.658","article-title":"An evaluation of the standardized precipitation index, the china-z index and the statistical z-score","volume":"21","author":"Wu","year":"2001","journal-title":"Int. J. Climatol."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"797","DOI":"10.1080\/13658810600665111","article-title":"Efficient regionalization techniques for socio-economic geographical units using minimum spanning trees","volume":"20","author":"Assuncao","year":"2006","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"1650","DOI":"10.1109\/TPAMI.2002.1114856","article-title":"Performance evaluation of some clustering algorithms and validity indices","volume":"24","author":"Maulik","year":"2002","journal-title":"IEEE Trans. Pattern Anal. Mach. Intell."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1086\/648549","article-title":"An introduction to digital convergence: Libraries, archives, and museums in the information age","volume":"80","author":"Marty","year":"2010","journal-title":"Libr. Quart."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/j.compenvurbsys.2018.03.008","article-title":"Challenges for social flows","volume":"70","author":"Andris","year":"2018","journal-title":"Comput. Environ. Urban Syst."},{"key":"ref_60","first-page":"2009","article-title":"Integrating social network data into gisystems","volume":"30","author":"Andris","year":"2016","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1111\/j.1538-4632.1982.tb00068.x","article-title":"Non-Euclidean geographic spaces: Mapping functional distances","volume":"14","author":"Midler","year":"1982","journal-title":"Geogr. Anal."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1016\/j.cities.2018.09.016","article-title":"Delineating urbanization \u201csource-sink\u201d regions in china: Evidence from mobile app data","volume":"86","author":"Wang","year":"2019","journal-title":"Cities"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1002\/jpln.201100395","article-title":"Cumulative effects of a 17-year chemical fertilization on the soil quality of cropping system in the loess hilly region, China","volume":"176","author":"Li","year":"2013","journal-title":"J. Plant Nutr. Soil Sci."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"346","DOI":"10.1080\/13658816.2018.1533136","article-title":"Reflections and speculations on the progress in Geographic Information Systems (GIS): A geographic perspective","volume":"33","author":"Lu","year":"2019","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"417","DOI":"10.1162\/JINH_r_01180","article-title":"Feeding gotham: The political economy and geography of food in New York city, 1790\u20131860","volume":"48","author":"Soll","year":"2018","journal-title":"J. Interdiscipl. Hist."}],"updated-by":[{"DOI":"10.3390\/ijgi9010035","type":"correction","label":"Correction","source":"publisher","updated":{"date-parts":[[2019,7,23]],"date-time":"2019-07-23T00:00:00Z","timestamp":1563840000000}}],"container-title":["ISPRS International Journal of Geo-Information"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2220-9964\/8\/7\/314\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,3]],"date-time":"2025-08-03T22:35:07Z","timestamp":1754260507000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2220-9964\/8\/7\/314"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,7,23]]},"references-count":65,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2019,7]]}},"alternative-id":["ijgi8070314"],"URL":"https:\/\/doi.org\/10.3390\/ijgi8070314","relation":{"correction":[{"id-type":"doi","id":"10.3390\/ijgi9010035","asserted-by":"object"}]},"ISSN":["2220-9964"],"issn-type":[{"value":"2220-9964","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,7,23]]}}}