{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T15:57:45Z","timestamp":1772121465283,"version":"3.50.1"},"reference-count":24,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,1,22]],"date-time":"2021-01-22T00:00:00Z","timestamp":1611273600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100008383","name":"Bundesministerium f\u00fcr Verkehr und Digitale Infrastruktur","doi-asserted-by":"publisher","award":["19H18006B"],"award-info":[{"award-number":["19H18006B"]}],"id":[{"id":"10.13039\/100008383","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The regular inspection of the crane tracks of storage cranes at the Container Terminal Altenwerder (CTA), Hamburg requires high accuracy of measurements to determine its position. The allowed tolerances are in the range of 10 mm in the XY plane on a track length of 300 m. The traditional semi-automatic surveying methods are slow and require the interruption of the activities in the storage blocks. The research project AeroInspekt proposed a fully automatic measurement of the position of the tracks using UAV-based photogrammetry. In this paper, the results of the test campaign, carried out in June 2020, were presented where different cameras (150 mm and 80 mm telelens) and flight speeds (1.1 m\/s and 1.9 m\/s) at a 35 m flying height were performed. Furthermore, an automated rail delineation in the derived surface model was developed and evaluated with ground reference measurements. The results show that the required accuracy of the rail position with an RMSE of 3 mm in XY plane and 8 mm in altitude can be achieved with comparatively less disruption of regular block activities.<\/jats:p>","DOI":"10.3390\/rs13030384","type":"journal-article","created":{"date-parts":[[2021,1,22]],"date-time":"2021-01-22T11:13:53Z","timestamp":1611314033000},"page":"384","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Implementation and Validation of a High Accuracy UAV-Photogrammetry Based Rail Track Inspection System"],"prefix":"10.3390","volume":"13","author":[{"given":"Yahya","family":"Ghassoun","sequence":"first","affiliation":[{"name":"Institute of Photogrammetry and Geodesy, Technical University of Braunschweig, 38106 Braunschweig, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2221-6182","authenticated-orcid":false,"given":"Markus","family":"Gerke","sequence":"additional","affiliation":[{"name":"Institute of Photogrammetry and Geodesy, Technical University of Braunschweig, 38106 Braunschweig, Germany"}]},{"given":"Yogesh","family":"Khedar","sequence":"additional","affiliation":[{"name":"Institute of Flight Guidance, Technical University of Braunschweig, 38106 Braunschweig, Germany"}]},{"given":"Jan","family":"Backhaus","sequence":"additional","affiliation":[{"name":"Institute of Flight Guidance, Technical University of Braunschweig, 38106 Braunschweig, Germany"}]},{"given":"Markus","family":"Bobbe","sequence":"additional","affiliation":[{"name":"Wingcopter GmbH, Darmstadt, 64331 Weiterstadt, Germany"}]},{"given":"Henry","family":"Meissner","sequence":"additional","affiliation":[{"name":"The German Aerospace Center (DLR), Institute of Optical Sensor System, 12489 Berlin, Germany"}]},{"given":"Prashant Kumar","family":"Tiwary","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology (BHU) Varanasi, Uttar Pradesh 221005, India"}]},{"given":"Ralf","family":"Heyen","sequence":"additional","affiliation":[{"name":"GRAVIONIC GmbH, 38102 Braunschweig, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"293","DOI":"10.5194\/isprs-annals-V-1-2020-293-2020","article-title":"High-Precision Object Delineation with UAV-Demonstrated on a track System","volume":"2020","author":"Gerke","year":"2020","journal-title":"ISPRS Ann. 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