{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T15:25:11Z","timestamp":1774625111918,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2021,6,14]],"date-time":"2021-06-14T00:00:00Z","timestamp":1623628800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010680","name":"H2020 Transport","doi-asserted-by":"publisher","award":["769055"],"award-info":[{"award-number":["769055"]}],"id":[{"id":"10.13039\/100010680","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100014440","name":"Ministerio de Ciencia, Innovaci\u00f3n y Universidades","doi-asserted-by":"publisher","award":["RTI2018-095893-B-C21"],"award-info":[{"award-number":["RTI2018-095893-B-C21"]}],"id":[{"id":"10.13039\/100014440","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100014440","name":"Ministerio de Ciencia, Innovaci\u00f3n y Universidades","doi-asserted-by":"publisher","award":["FJC2018\u2013035550-I"],"award-info":[{"award-number":["FJC2018\u2013035550-I"]}],"id":[{"id":"10.13039\/100014440","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The growing development of data digitalisation methods has increased their demand and applications in the transportation infrastructure field. Currently, mobile mapping systems (MMSs) are one of the most popular technologies for the acquisition of infrastructure data, with three-dimensional (3D) point clouds as their main product. In this work, a heuristic-based workflow for semantic segmentation of complex railway environments is presented, in which their most relevant elements are classified, namely, rails, masts, wiring, droppers, traffic lights, and signals. This method takes advantage of existing methodologies in the field for point cloud processing and segmentation, taking into account the geometry and spatial context of each classified element in the railway environment. This method is applied to a 90-kilometre-long railway lane and validated against a manual reference on random sections of the case study data. The results are presented and discussed at the object level, differentiating the type of the element. The indicators F1 scores obtained for each element are superior to 85%, being higher than 99% in rails, the most significant element of the infrastructure. These metrics showcase the quality of the algorithm, which proves that this method is efficient for the classification of long and variable railway sections, and for the assisted labelling of point cloud data for future applications based on training supervised learning models.<\/jats:p>","DOI":"10.3390\/rs13122332","type":"journal-article","created":{"date-parts":[[2021,6,14]],"date-time":"2021-06-14T22:25:46Z","timestamp":1623709546000},"page":"2332","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Automatic Point Cloud Semantic Segmentation of Complex Railway Environments"],"prefix":"10.3390","volume":"13","author":[{"given":"Daniel","family":"Lamas","sequence":"first","affiliation":[{"name":"Centro de Investigaci\u00f3n en Tecnolox\u00edas, Enerx\u00eda e Procesos Industriais (CINTECX), Applied Geotechnologies Research Group, Campus Universitario de Vigo, Universidade de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6545-2225","authenticated-orcid":false,"given":"Mario","family":"Soil\u00e1n","sequence":"additional","affiliation":[{"name":"Department of Cartographic and Terrain Engineering, University of Salamanca, Calle Hornos Caleros 50, 05003 Avila, Spain"}]},{"given":"Javier","family":"Grand\u00edo","sequence":"additional","affiliation":[{"name":"Centro de Investigaci\u00f3n en Tecnolox\u00edas, Enerx\u00eda e Procesos Industriais (CINTECX), Applied Geotechnologies Research Group, Campus Universitario de Vigo, Universidade de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1497-4370","authenticated-orcid":false,"given":"Bel\u00e9n","family":"Riveiro","sequence":"additional","affiliation":[{"name":"Centro de Investigaci\u00f3n en Tecnolox\u00edas, Enerx\u00eda e Procesos Industriais (CINTECX), Applied Geotechnologies Research Group, Campus Universitario de Vigo, Universidade de Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,14]]},"reference":[{"key":"ref_1","unstructured":"(2021, January 26). 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