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Applying close range digital photogrammetry in soil erosion studies / B. Heng in Photogrammetric record, vol 25 n° 131 (September - November 2010)  

Public [article]  inPhotogrammetric record > vol 25 n° 131 (September - November 2010) . - pp 240 - 265 Titre : Applying close range digital photogrammetry in soil erosion studies Type de document : Article/Communication Auteurs : B. Heng, Auteur ; Jim H. Chandler, Auteur ; A. Armstrong, Auteur Année de publication : 2010 Article en page(s) : pp 240 - 265 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse comparative [Termes IGN] érosion hydrique [Termes IGN] image oblique [Termes IGN] microtopographie [Termes IGN] modèle numérique de terrain [Termes IGN] photogrammétrie métrologique [Termes IGN] photogrammétrie terrestre [Termes IGN] télémétrie laser terrestre Résumé : (Auteur) Soil erosion due to rainfall and overland flow is a significant environmental problem. Studying the phenomenon requires accurate high-resolution measurements of soil surface topography and morphology. Close range digital photogrammetry with an oblique convergent configuration is proposed in this paper as a useful technique for such measurements, in the context of a flume-scale experimental study. The precision of the technique is assessed by comparing triangulation solutions and the resulting DEMs with varying tie point distributions and control point measurements, as well as by comparing DEMs extracted from different images of the same surface. Independent measurements were acquired using a terrestrial laser scanner for comparison with a DEM derived from photogrammetry. The results point to the need for a stronger geometric configuration to improve precision. They also suggest that the camera lens models were not fully adequate for the large object depths in this study. Nevertheless, the photogrammetric output can provide useful topographical information for soil erosion studies, provided limitations of the technique are duly considered. Numéro de notice : A2010-381 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2010.00584.x Date de publication en ligne : 15/09/2010 En ligne : https://doi.org/10.1111/j.1477-9730.2010.00584.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30575 [article]

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