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Geometric validation of a ground-based mobile laser scanning system / D. Barber in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 1 (January - February 2008)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 63 n° 1 (January - February 2008) . - pp 128 - 141 Titre : Geometric validation of a ground-based mobile laser scanning system Type de document : Article/Communication Auteurs : D. Barber, Auteur ; Jon Mills, Auteur ; S. Smith-Voysey, Auteur Année de publication : 2008 Article en page(s) : pp 128 - 141 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes IGN] données laser [Termes IGN] données localisées 3D [Termes IGN] lasergrammétrie [Termes IGN] lever topographique [Termes IGN] milieu urbain [Termes IGN] outil d'aide à la décision [Termes IGN] précision des données [Termes IGN] semis de points [Termes IGN] système de numérisation mobile [Termes IGN] validité des données Résumé : (Auteur) This paper outlines a study, carried out on behalf of a national mapping agency, to validate laser scanned point cloud data collected by a ground-based mobile mapping system. As the need for detailed three-dimensional data about our environment continues to grow, ground-based mobile systems are likely to find an increasingly important niche in national mapping agency applications. For example, such systems potentially provide the most efficient data capture for numerical modelling and/or visualisation in support of decision making, filling a void between static terrestrial and mobile airborne laser scanning. This study sought to assess the precision and accuracy of data collected using the StreetMapper system across two test sites: a peri-urban residential housing estate with low density housing and wide streets, and a former industrial area consisting of narrow streets and tall warehouses. An estimate of system precision in both test sites was made using repeated data collection passes, indicating a measurement precision (95%) of between 0.029 m and 0.031 m had been achieved in elevation. Elevation measurement accuracy was assessed against check points collected using conventional surveying techniques at the same time as the laser scanning survey, finding RMS errors in elevation in the order of 0.03 m. Planimetric accuracy was also assessed, with results indicating an accuracy of approximately 0.10 m, although difficulties in reliably assessing planimetric accuracy were encountered. The results of this validation were compared against a theoretical error pre-analysis which was also used to show the relative components of error within the system. Finally, recommendations for future validation methodologies are outlined and possible applications of the system are briefly discussed. Copyright ISPRS Numéro de notice : A2008-041 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2007.07.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2007.07.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29036 [article]

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