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Error budget of Lidar systems and quality control of the derived data / A. Habib in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 9 (September 2009)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 9 (September 2009) . - pp 1093 - 1108 Titre : Error budget of Lidar systems and quality control of the derived data Type de document : Article/Communication Auteurs : A. Habib, Auteur ; K.I. Bang, Auteur ; A. Kersting, Auteur ; D.C. Lee, Auteur Année de publication : 2009 Article en page(s) : pp 1093 - 1108 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] contrôle qualité [Termes IGN] données lidar [Termes IGN] erreur aléatoire [Termes IGN] erreur systématique [Termes IGN] lasergrammétrie [Termes IGN] modèle mathématique [Termes IGN] point d'appui Résumé : (Auteur) Lidar systems have been widely adopted for the acquisition of dense and accurate topographic data over extended areas. Although the utilization of this technology has increased in different applications, the development of standard methodologies for the quality assurance of lidar systems and quality control of the derived data has not followed the same trend. In other words, a lack of reliable, practical, cost-effective, and commonly-acceptable methods for quality evaluation is evident. A frequently adopted procedure for quality evaluation is the comparison between lidar data and ground control points. Besides being expensive, this approach is not accurate enough for the verification of the horizontal accuracy, which is known to be worse than the vertical accuracy. This paper is dedicated to providing an accurate, economical, and convenient quality control methodology for the evaluation of lidar data. The paper starts with a brief discussion of the lidar mathematical model, which is followed by an analysis of possible random and systematic errors and their impact on the resulting surface. Based on the discussion of error sources and their impact, a tool for evaluating the quality of the derived surface is proposed. In addition to the verification of the data quality, the proposed method can be used for evaluating the system parameters and measurements. Experimental results from simulated and real data demonstrate the feasibility of the proposed tool. Copyright ASPRS Numéro de notice : A2009-371 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.9.1093 En ligne : https://doi.org/10.14358/PERS.75.9.1093 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30001 [article]

A strip adjustment procedure to mitigate the impact of inaccurate mounting parameters in parallel Lidar strips / A.F. Habib in Photogrammetric record, vol 24 n° 126 (June - August 2009)  

Public [article]  inPhotogrammetric record > vol 24 n° 126 (June - August 2009) . - pp 171 - 195 Titre : A strip adjustment procedure to mitigate the impact of inaccurate mounting parameters in parallel Lidar strips Type de document : Article/Communication Auteurs : A.F. Habib, Auteur ; A. Kersting, Auteur ; K.I. Bang, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 171 - 195 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] compensation par bloc [Termes IGN] données lidar [Termes IGN] étalonnage géométrique [Termes IGN] GPS-INS [Termes IGN] objet géographique linéaire [Termes IGN] trajectographie par GPS Résumé : (Auteur) Lidar (laser scanning) technology has been proven as a prominent technique for the acquisition of high-density and accurate topographic information. Because of systematic errors in the lidar measurements (drifts in the position and orientation information and biases in the mirror angles and ranges) and/or in the parameters relating the system components (mounting parameters), adjacent lidar strips may exhibit discrepancies. Although position and orientation drifts can have a more significant impact, these errors and their impact do not come as a surprise if the quality of the GPS/INS integration process is carefully examined. Therefore, the mounting errors are singled out in this work. The ideal solution for improving the compatibility of neighbouring strips in the presence of errors in the mounting parameters is the implementation of a rigorous calibration procedure. However, such a calibration requires the original observations, which may not be usually available. In this paper, a strip adjustment procedure to improve the compatibility between parallel lidar strips with moderate flight dynamics (for example, acquired by a fixed-wing aircraft) over an area with moderately varying elevation is proposed. The proposed method is similar to the photogrammetric block adjustment of independent models. Instead of point features, planar patches and linear features, which are represented by sets of non-conjugate points, are used for the strip adjustment. The feasibility and the performance of the proposed procedure together with its impact on subsequent activities are illustrated using experimental results from real data. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2009-209 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2009.00529.x En ligne : https://doi.org/10.1111/j.1477-9730.2009.00529.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29839 [article]

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