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Estimation of avalanche front velocities from high speed terrestrial photogrammetry / A. Soruco (2011)

Public Titre : Estimation of avalanche front velocities from high speed terrestrial photogrammetry Type de document : Article/Communication Auteurs : A. Soruco, Auteur ; Emmanuel Thibert, Auteur ; C. Vincent, Auteur ; Richard Blanc, Auteur ; Raphaële Heno , Auteur Editeur : Munich [Allemagne] : European Geosciences Union EGU Année de publication : 2011 Conférence : EGU 2011, G 6.1 symposium Geodetic and geodynamic programmes of the central Europe 03/04/2011 08/04/2011 Vienne Autriche programme Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] avalanche [Termes IGN] modèle numérique de surface [Termes IGN] séquence d'images [Termes IGN] vitesse Résumé : (auteur) Avalanche flow models are important tools for avalanche risk mitigation. Artificial avalanche release can provide data for validation of flow models as for example the run-out distance reached by the avalanche. Here we attempt to measure in time the position and velocity of the front of the avalanche in order to provide dynamic data for model calibration. Experiments have been carried out on the full-scale avalanche experimental site at Lautaret pass (French Alps). High speed terrestrial photogrammetry is used to obtain Digital Elevation Models (DEM) during an avalanche release. Recent advances in digital commercial cameras allow acquiring up to 4 frames per second with 10-20 Mpixels of resolution. The principal point position, the focal length and the lens distortion are obtained from calibration, indicating negligible pincushion distortion but significant lens decentration. The camera calibration parameters enable to triangulate two stereo-pairs on ground control points within 6 cm of orientation residuals. A specific DEM generated for comparison with a laser scan DEM reveals a ± 11 cm of random error but no systematic discrepancy. Finally, avalanche front positions and velocities are calculated from a 30 s sequence of stereo pairs acquired during an artificial release with 2 cameras synchronized with digital wireless radio transceivers. Numéro de notice : C2011-044 Affiliation des auteurs : ENSG+Ext (1941-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComSansActesPubliés-Unpublished DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96382

Generalization of DEM for terrain analysis using a compound method / Q. Zhou in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 1 (January - February 2011)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 66 n° 1 (January - February 2011) . - pp 38 - 45 Titre : Generalization of DEM for terrain analysis using a compound method Type de document : Article/Communication Auteurs : Q. Zhou, Auteur ; Y. Chen, Auteur Année de publication : 2011 Article en page(s) : pp 38 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] erreur moyenne quadratique [Termes IGN] généralisation automatique de données [Termes IGN] généralisation de MNT [Termes IGN] modèle numérique de surface [Termes IGN] Triangulated Irregular Network Résumé : (Auteur) This paper reports an investigation into the generalization of a grid-based digital elevation model (DEM) for the purpose of terrain analysis. The focus is on the method of restructuring the grid-based surface elevation data to form a triangulated irregular network (TIN) that is optimized to keep the important terrain features and slope morphology with the minimum number of sample points. The critical points of the terrain surface are extracted from the DEM based on their significance, measured not only by their local relief, but also by their importance in identifying inherent geomorphological and drainage features in the DEM. A compound method is proposed by integrating the traditional point-additive and feature-point methods to construct a drainage-constrained TIN. The outcome is then compared with those derived from other selected methods including filtering, point-additive or feature-point algorithms. The results show that the compound approach is capable of taking advantage of both point-additive and feature-point algorithms to maximally keep the terrain features and to maintain RMSE at an acceptable level, while reducing the elevation data points by over 99%. The analytical result also shows that the proposed method outperforms the compared methods with better control in retaining drainage features at the same level of RMSE. Numéro de notice : A2011-015 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.08.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.08.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30797 [article]

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081-2011011	SL	Revue	Centre de documentation	Revues en salle	Disponible

Registration quality - towards integration of laser scanning and photogrammetry / Petri Rönnholm (2011)    

Public Titre : Registration quality - towards integration of laser scanning and photogrammetry Autre titre : Atlas of INSPIRE implementation methods Type de document : Rapport Auteurs : Petri Rönnholm, Auteur ; Ingrid Vanden Berghe, Auteur ; Joep Crompvoets, Auteur ; Walter de Vries, Auteur ; Jantien E. Stoter, Auteur Editeur : Dublin : European Spatial Data Research EuroSDR Année de publication : 2011 Collection : EuroSDR official publication, ISSN 0257-0505 num. 59 Importance : 298 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-90-5179-768-8 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] acquisition de données [Termes IGN] analyse comparative [Termes IGN] enregistrement de données [Termes IGN] instrument aéroporté [Termes IGN] intégration de données [Termes IGN] lasergrammétrie [Termes IGN] photogrammétrie numérique Index. décimale : 33.30 Photogrammétrie numérique Résumé : (Auteur)1 : Laser scanning and photogrammetry are powerful 3D data acquisition methods providing both overlapping and complementary information. Currently, integration of laser data and images provides the most complete information for various surveying and 3D modelling tasks. However, this integration requires that both data sets are accurately oriented to the same coordinate system. In 2008, the EuroSDR launched the project "Registration Quality - Towards Integration of Laser Scanning and Photogrammetry" in order to collect knowledge about current registration methods and their performance. The project attracted the involvement of numerous research institutes and companies. Therefore, this test gives a quite extensive set of examples and comparisons of the most important registration strategies today. The empirical results indicated that the relative orientation of airborne laser scanning data and aerial images is a feasible method in order to get data sets within the common coordinate frame. The experiment revealed that, currently, the level of automation was not the most significant factor affecting the quality of registration. More important factors included the type of tie features and the implementation of the methods. The processing time was shortest with most automatic methods, whereas the amount of manual work tended to increase the processing times. It should be noted that many of the methods were still at the developmental stage. It is expected that the performance and processing speed, in most cases, can be enhanced in the future. The test data represented an urban area and many of the methods relied upon certain objects, such as buildings. Therefore, the performance of applied methods in non-built environments should be investigated separately. ; (Auteur)2 : This report is the final report of the EuroSDR project "Atlas of INSPIRE Implementation Methods". In two two-day workshops and one pre-workshop of the INSPIRE Conference in Krakow, June, 2010 we investigated strategies to implement INSPIRE in several members states. We focused specifically on the relations between the implemented strategy and how successful the INSPIRE implementation is perceived in a specific country. A questionnaire was carried out as well. This report describes the project, presents the conclusions and contains the main deliverables of the project which are: -Two workshop reports - Research agenda for the implementation of INSPIRE -A network of SDI-practitioners and scientists across Europe that are strongly involved in the development of INSPIRE SDI-strategies -Scientific paper publications Scientific paper publications: published IJSDIR article [1] and article in progress for CEUS (Journal for Computers, Environment and Urban Systems) -INSPIRE-Conference pre-conference workshop, abstract and presentation -Key documents collection regarding INSPIRE-implementation -Prototype INSPIRE atlas (see: http://www.spatialist.be) Note de contenu : Registration quality - towards integration of laser scanning and photogrammetry 1 INTRODUCTION 2 DESCRIPTION OF THE PROJECT 2.1 Aims of the project. 2.2 Participants. 2.3 Description of test data 2.4 Reference data. 2.5 Test procedure. 3 SHORT DESCRIPTIONS OF THE APPLIED METHODS 3.1 Method of the Aalto University School of Engineering (Aalto). 3.2 Method of the Dublin Institute of Technology (DIT). 3.3 Method of the Finnish Geodetic Institute, Aalto University School of Engineering and TerraSolid Oy (FGI et al.) 3.4 Method of the Independent Research Group on Geospatial (IRGG) 3.5 Method 1 of the National Geographic Institute, Spain (IGN-1). 3.6 Method 2 of the National Geographic Institute, Spain (IGN-2) . 3.7 Planar patches method of the University of Calgary (UofC-1). 3.8 Straight lines method of the University of Calgary (UofC-2). 3.9 Combined method of the University of Calgary (UofC-3). 3.10 Method of the University College London (UCL). 3.11 ICP-based method of the University of Stuttgart (IFP-1). 3.12 Point-Based method of the University of Stuttgart (IFP-2) 3.13 Method of the Vienna University of Technology (IPF) 4 RESULTS AND DISCUSSION 4.1 Comparison of planimetric accuracies. 4.2 Comparison of vertical accuracies. 4.3 Comparison of accuracies in rotations. 4.4 Influence of the type of tie features 4.5 Influence of the analytical characteristics of the applied methods 4.6 Influence of the level of automation 4.7 Processing time 5 SUMMARY AND CONCLUSIONS 6 ACKNOWLEDGEMENTS 7 REFERENCES Atlas of INSPIRE implementation 1 INTRODUCTION 2 QUESTIONNAIRE 2.1 Introduction 2.2 Questions 2.3 Analysis of the questionnaire responses 2.4 Conclusions of the questionnaire 3 REPORT OF 1ST PROJECT WORKSHOP, 29 & 30 APRIL 2009 3.1 Introduction 3.2 Brief description of the Workshop 29 - 30 April 2009 3.3 Research questions identified by the participants 3.4 Main observations during the workshop 3.5 Remarkable quotes 4 REPORT OF 2ND PROJECT WORKSHOP 14/15 JANUARY 2010 4.1 Introduction 4.2 Successes and disappointments 4.3 Propositions 4.4 Research agenda 4.5 Concluding remarks 5 PRE-CONFERENFE INSPIRE WORKSHOP, 22 JUNE 2010 6 CONCLUSION Numéro de notice : 10477 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Rapport d'étude technique En ligne : http://www.eurosdr.net/sites/default/files/uploaded_files/eurosdr_publication_nd [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62449

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Documents numériques

en open access Eurosdr bull 59 Adobe Acrobat PDF

Représenter le relief / Nicolas Paparoditis in Tangente, hors série n° 40 (01/01/2011)

Public [article]  inTangente > hors série n° 40 (01/01/2011) . - pp 90 - 93 Titre : Représenter le relief Type de document : Article/Communication Auteurs : Nicolas Paparoditis , Auteur Année de publication : 2011 Projets : 1-Pas de projet / Article en page(s) : pp 90 - 93 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] modèle numérique de terrain [Termes IGN] relief [Termes IGN] visualisation 3D Résumé : (Auteur) On représente le relief grâce à des modèles numériques utilisant des échantillons réguliers ou irréguliers de points dont on mesure les coordonnées. Photogrammétrie, nivellement, lasergrammétrie, ... de nombreuses techniques opérationnelles permettent d'obtenir le relief sur de grandes surfaces. Numéro de notice : A2011-295 Affiliation des auteurs : MATIS (1993-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtSansCL DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31074 [article]

Exemplaires(1)

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10342-01	30.61	Revue	Centre de documentation	Géodésie	Disponible

DTM generalisation : handling large volumes of data for multi-scale mapping / O. Chaudry in Cartographic journal (the), vol 47 n° 4 (November 2010)  

Public [article]  inCartographic journal (the) > vol 47 n° 4 (November 2010) . - pp 360 - 370 Titre : DTM generalisation : handling large volumes of data for multi-scale mapping Type de document : Article/Communication Auteurs : O. Chaudry, Auteur ; William A Mackaness, Auteur Année de publication : 2010 Article en page(s) : pp 360 - 370 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] données multiéchelles [Termes IGN] généralisation automatique de données [Termes IGN] généralisation de MNT [Termes IGN] modèle numérique de surface [Termes IGN] modèle numérique de terrain [Termes IGN] morphologie mathématique [Termes IGN] partitionnement par bloc [Termes IGN] représentation multiple Résumé : (Auteur) Map generalisation is a modelling process in which it is typical that detailed, high dimensional geographic phenomena are reduced down to a set of `higher order', yet more generalized set of phenomena (for example, a large cluster of buildings is reduced to `city'). This process of generalisation necessarily requires us to handle large volumes of data which results in high processing overheads. One way of managing this is to partition the data. When geographically partitioning data, we need to partition in such a way that each partition can be generalized without having to consider regions outside any given partition. The focus of this paper is to explore partitioning and generalisation methodologies that can be applied to digital elevation data - the ambition being to derive generalized descriptions of morphology at the National Scale (for the UK). The paper describes and compares two solutions to this problem, and demonstrates how it is possible to apply generalisation algorithms to national coverages. Numéro de notice : A2010-543 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870410X12825500202896 Date de publication en ligne : 29/11/2013 En ligne : https://doi.org/10.1179/000870410X12825500202896 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30735 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
030-2010041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Point clouds : Lidar versus 3D vision / A. Irschara in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 10 (October 2010)  

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3D ichnology-recovering digital 3D models of dinosaur footprints / Fabio Remondino in Photogrammetric record, vol 25 n° 131 (September - November 2010)  

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2D building change detection from high resolution satellite imagery: A two-step hierarchical method based on 3D invariant primitives / Nicolas Champion in Pattern recognition letters, vol 31 n° 10 (15 July 2010)  

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3D road marking reconstruction from street-level calibrated stereo pairs / Bahman Soheilian in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 4 (July - August 2010)  

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An application-driven approach to terrain model construction / A. Darnell in International journal of geographical information science IJGIS, vol 24 n°7-8 (july 2010)  

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Orientation relative à partir de 3 points homologues et de la direction verticale : Une approche directe / Mahzad Kalantari in Traitement du signal, vol 27 n° 3 (2010-3)  

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MNT, MNE, MNS : de quoi parle-t-on ? / Françoise de Blomac in SIG la lettre, n° 116 (avril 2010)

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MNT et MNE sur étagère / Françoise de Blomac in SIG la lettre, n° 116 (avril 2010)

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Problèmes de calage de la carte historique de Rome (1908) à l'échelle 1:5 000 / Valerio Baiocchi in Géomatique expert, n° 74 (01/04/2010) 

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Qualité, résolution, précision... Bienvenue dans un monde imparfait / Françoise de Blomac in SIG la lettre, n° 116 (avril 2010)

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Interest operators for feature-based matching in close range photogrammetry / I. Jazayeri in Photogrammetric record, vol 25 n° 129 (March - May 2010)  

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A mathematical expression for stereoscopic depth perception / H. Rosas in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 3 (March 2010)  

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Co-simulation / S. Grosjean (2010) 

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Modélisation de façades par analyse conjointe d'images terrestres et de données laser / Antoine Pinte (2010) 

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Photogrammetric computer vision and image analysis, ISPRS Commission 3 symposium, Saint-Mandé, 1-3 septembre 2010, volume 1. Papers accepted on the basis of peer-reviewed full manuscripts / Nicolas Paparoditis (2010)  

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Photogrammétrie et épigraphie / Adrien Gressin (2010) 

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Photogrammétrie numérique et risques naturels : application à la dynamique des avalanches et aux chutes de séracs / Emmanuel Thibert (2010)  

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Photogrammétrie et risques naturels : application à la dynamique des avalanches et aux chutes de séracs / A. Soruco (2010) 

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Structural approach for building reconstruction from a single DSM / Florent Lafarge in IEEE Transactions on Pattern Analysis and Machine Intelligence, PAMI, vol 32 n° 1 (January 2010)    

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From imagery to map: digital photogrammetric technologies, a report to the Greece 2009 conference / Gordon Petrie in Geoinformatics, vol 12 n° 8 (01/12/2009)

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