{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T04:11:59Z","timestamp":1768450319525,"version":"3.49.0"},"reference-count":56,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,12,30]],"date-time":"2022-12-30T00:00:00Z","timestamp":1672358400000},"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":["42101353"],"award-info":[{"award-number":["42101353"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["21YJC790129"],"award-info":[{"award-number":["21YJC790129"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["LJKMZ20220946"],"award-info":[{"award-number":["LJKMZ20220946"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Humanities and Social Sciences Foundation of the Ministry of Education of China (General Program)","award":["42101353"],"award-info":[{"award-number":["42101353"]}]},{"name":"Humanities and Social Sciences Foundation of the Ministry of Education of China (General Program)","award":["21YJC790129"],"award-info":[{"award-number":["21YJC790129"]}]},{"name":"Humanities and Social Sciences Foundation of the Ministry of Education of China (General Program)","award":["LJKMZ20220946"],"award-info":[{"award-number":["LJKMZ20220946"]}]},{"name":"Basic Research Programs of Colleges and Universities of Liaoning Province of China","award":["42101353"],"award-info":[{"award-number":["42101353"]}]},{"name":"Basic Research Programs of Colleges and Universities of Liaoning Province of China","award":["21YJC790129"],"award-info":[{"award-number":["21YJC790129"]}]},{"name":"Basic Research Programs of Colleges and Universities of Liaoning Province of China","award":["LJKMZ20220946"],"award-info":[{"award-number":["LJKMZ20220946"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The urban spatial structure is a key feature of the distribution of social and economic resources. The spatial structure of an urban agglomeration is an abstract relationship expression of urbanization. Urban agglomerations develop for multiple reasons, including urban planning and natural evolution. To date, most research related to urban agglomeration has been based on single data source, which is a limitation. This research aims to propose a spatial structure identification method for urban agglomerations via a complex network based on nighttime light data and railway data. Firstly, we extracted the urban built-up area using defense meteorological satellite program\/operational line scanner (DMSP\/OLS) data, and divided it into urban objects to obtain the nighttime light urban network (NLUN) by borough. Secondly, we aggregated railway stations at municipal level using railway operation data to obtain the railway urban network (RUN). Following this, we established a composite urban network (CUN) consisting of the NLUN and the RUN based on the composite adjacency matrix. Finally, the Louvain algorithm and the comprehensive strength index (CSI) were used to detect the communities and central nodes of the CUN and obtain the urban agglomerations and core cities. The results show that urban agglomeration identification based on the CUN has the best accuracy, which is 5.72% and 15.94% higher than that of the NLUN and RUN, respectively. Core cities in the urban agglomeration identified by the CSI in the CUN are at least 3.04% higher than those in the single-source urban network. In addition, the distribution pattern of Chinese urban agglomerations in the study area is expressed as \u201cthree vertical\u201d, and the development level of urban agglomeration shows an unbalanced trend.<\/jats:p>","DOI":"10.3390\/rs15010216","type":"journal-article","created":{"date-parts":[[2023,1,2]],"date-time":"2023-01-02T02:44:03Z","timestamp":1672627443000},"page":"216","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["A Structure Identification Method for Urban Agglomeration Based on Nighttime Light Data and Railway Data"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0505-5724","authenticated-orcid":false,"given":"Zhiwei","family":"Xie","sequence":"first","affiliation":[{"name":"School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China"},{"name":"Key Laboratory of Virtual Geographic Environment (Ministry of Education of PRC), Nanjing Normal University, Nanjing 210023, China"},{"name":"State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing Normal University, Nanjing 210023, China"},{"name":"Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing 210023, China"}]},{"given":"Mingliang","family":"Yuan","sequence":"additional","affiliation":[{"name":"School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1951-9617","authenticated-orcid":false,"given":"Fengyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong SAR, China"}]},{"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 (Ministry of Education of PRC), Nanjing Normal University, Nanjing 210023, China"},{"name":"State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing Normal University, Nanjing 210023, China"},{"name":"Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing 210023, China"}]},{"given":"Meng","family":"Tian","sequence":"additional","affiliation":[{"name":"Business School, Yangzhou University, Yangzhou 225127, China"}]},{"given":"Lishuang","family":"Sun","sequence":"additional","affiliation":[{"name":"School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China"}]},{"given":"Guoqing","family":"Su","sequence":"additional","affiliation":[{"name":"School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China"}]},{"given":"Ruizhao","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"126","DOI":"10.1016\/j.landurbplan.2017.02.014","article-title":"Urban agglomeration: An evolving concept of an emerging phenomenon","volume":"162","author":"Fang","year":"2017","journal-title":"Landsc. 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