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Terrestrial laser scanning for use in virtual outcrop geology / S.J. Buckley in Photogrammetric record, vol 25 n° 131 (September - November 2010)  

Public [article]  inPhotogrammetric record > vol 25 n° 131 (September - November 2010) . - pp 225 - 239 Titre : Terrestrial laser scanning for use in virtual outcrop geology Type de document : Article/Communication Auteurs : S.J. Buckley, Auteur ; H. Enge, Auteur ; C. Carlsson, Auteur ; John Howell, Auteur Année de publication : 2010 Article en page(s) : pp 225 - 239 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données géologiques [Termes IGN] données lidar [Termes IGN] géologie locale [Termes IGN] image à très haute résolution [Termes IGN] prospection minérale [Termes IGN] semis de points [Termes IGN] simulation [Termes IGN] télémétrie laser terrestre [Termes IGN] texturage [Termes IGN] Utah (Etas-Unis) Résumé : (Auteur) This paper discusses the application of laser scanning and photo-realistic modelling to aid the study of geological outcrops, using two examples from central and eastern Utah, USA, which are analogues to subsurface hydrocarbon fields. Terrestrial laser scanning point clouds were triangulated to obtain high-resolution surface representations, which were combined with semi-metric imagery to give texture-mapped photo-realistic models of the outcrops. Such models provide the basis for geological interpretation and were used to reconstruct the geometries of layers over the extent of the study area. The digitised geological layers were in turn used to build geocellular volumes that capture the properties of the geology. These models were built in subsurface reservoir modelling software and were used to simulate the flow of fluids through the reservoir analogue. In this way, the spatial information provided significantly more detailed quantitative data and greatly improved the outcrop studies compared to traditional field techniques. Numéro de notice : A2010-380 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2010.00572.x En ligne : https://doi.org/10.1111/j.1477-9730.2010.00572.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30574 [article]

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Synergetic fusion of GPS and photogrammetrically generated elevation models / Jon P. Mills in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 4 (April 2003) . - pp 341 - 349 Titre : Synergetic fusion of GPS and photogrammetrically generated elevation models Type de document : Article/Communication Auteurs : Jon P. Mills, Auteur ; S.J. Buckley, Auteur ; H.L. Mitchell, Auteur Année de publication : 2003 Article en page(s) : pp 341 - 349 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] appariement géométrique [Termes IGN] coût [Termes IGN] données GPS [Termes IGN] erreur systématique [Termes IGN] fusion de données [Termes IGN] GPS en mode cinématique [Termes IGN] image numérique [Termes IGN] méthode des moindres carrés [Termes IGN] modèle numérique de surface [Termes IGN] orientation relative [Termes IGN] photographie aérienne [Termes IGN] point d'appui [Termes IGN] restitution Résumé : (Auteur) Digital elevation models (DEMs) produced from photogrammetric data sources have long relied on the use of ground control points to give them scale and orientation. However, in areas such as coastlines, landslides, or glaciers, where identification of suitable natural features and premarking is difficult, the use of conventional ground control may be unfeasible. This paper reports on research that uses independently collected DEMs derived from kinematic GPS to orient surfaces produced by aerial photogrammetric methods, using a leastsquares surface matching algorithm. During algorithm development, three stages of testing were carried out, Using increasingly more complex datasets. Initially, simulated surfaces were used to validate the matching theory and program. Then, a DEM derived from conventional aerial photography was matched with a GPS model, highlighting the effectiveness of surface matching to recover systematic errors in datosets. Finally, surfaces derived from small format digital imagery were successfully fused with wireframe GPS surfaces, the high redundancy and automation potential creating an elegant and cheaper alternative to photocontrol. Numéro de notice : A2003-109 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.4.341 En ligne : https://doi.org/10.14358/PERS.69.4.341 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22405 [article]