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Small-footprint laser scanning simulator for system validation, error assessment, and algorithm development / Antero Kukko in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 10 (October 2009)
[article]
Titre : Small-footprint laser scanning simulator for system validation, error assessment, and algorithm development Type de document : Article/Communication Auteurs : Antero Kukko, Auteur ; Juha Hyyppä, Auteur Année de publication : 2009 Article en page(s) : pp 1177 - 1189 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] classification orientée objet
[Termes IGN] détection de changement
[Termes IGN] données lidar
[Termes IGN] erreur systématique
[Termes IGN] faisceau laser
[Termes IGN] hauteur des arbres
[Termes IGN] instrumentation Toposys
[Termes IGN] modèle de simulation
[Termes IGN] précision décimétrique
[Termes IGN] semis de points
[Termes IGN] signal laser
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Airborne lidar systems have come to be extensively used in photogrammetry and mapping sciences. In this paper, a high-quality simulation approach and methods of smallfootprint lidar processing are presented and discussed, validated for tree height estimation, and demonstrated for scanning geometry effects analysis and mobile mapping. The simulation method implemented combines both spatial and radiometric components to produce realistic waveform and point cloud data for system performance analysis and for algorithm development for lidar data processing and mapping purposes. Waveform data generated by the simulator were shown to demonstrate the possibilities of such an approach in system and data verification. As the related empirical data are insufficient for effective research and exploitation in mapping purposes at the moment, the simulated waveform data are needed. A tree location accuracy of 15 cm and tree height underestimation of 0.33 m was found using the simulation model for the TopEye Mk II laser scanner, compared to the artificial forest model reference data. Modeling of light interaction on object surfaces and characteristics of scanning systems provide an opportunity to simulate laser data acquisition of well-defined objects under controlled conditions. By eliminating different sources of error case-by-case, we can improve the knowledge obtained merely from the experimental studies. Data validation in the scanning geometry simulations was carried out by comparing the simulated first echo data to the environment model and, separately, to the first echo data from an independent TopoSys II flight strip that was not used for the environment model computation. The mean differences reveal that the simulator slightly overestimates the object elevations. Deviation between the real TopoSys point cloud and the environmental model was 2 to 3 times larger than that obtained for the simulated Optech and TopoSys data sets.
We believe that the developed simulation and modeling is an efficient tool for determining the most reasonable set of flight parameters for any current mapping task, for analyzing change detection possibilities of repeated laser surveys, and for studying and verifying future lidar systems and concepts. However, this requires high-quality modeling of the system and extensive knowledge of the interaction between the laser beam and the object, which should be further developed in the coming years. Copyright ASPRSNuméro de notice : A2009-419 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.10.1177 En ligne : https://doi.org/10.14358/PERS.75.10.1177 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30050
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 10 (October 2009) . - pp 1177 - 1189[article]Effects of Lidar post-spacing and DEM resolution to mean slope estimation / T. Edwin in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)
[article]
Titre : Effects of Lidar post-spacing and DEM resolution to mean slope estimation Type de document : Article/Communication Auteurs : T. Edwin, Auteur ; M.E. Hodgson, Auteur Année de publication : 2009 Article en page(s) : pp 1277 - 1295 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse de sensibilité
[Termes IGN] bassin hydrographique
[Termes IGN] Caroline du Sud (Etats-Unis)
[Termes IGN] densité des points
[Termes IGN] données lidar
[Termes IGN] estimation de précision
[Termes IGN] modèle numérique de surface
[Termes IGN] pente
[Termes IGN] pouvoir de résolution géométriqueRésumé : (Auteur) This paper examines the effect of scale (exhibited by spatial sampling) in modeling mean slope from lidar data using two representations of scale: lidar posting density (i.e. post-spacing) and DEM resolution (i.e. cell size). The study areas selected include six small (i.e. approximately 3 km2) urban drainage basins in Richland County, SC, USA, which share similar hydrologic characteristics. This research spatially sampled an airborne lidar dataset collected in 2000 at a 2 m nominal posting density to simulate lidar posting density at various post-spacings, from 2 m through 10 m. DEMs were created from the lidar observations at a corresponding cell size using spatial interpolation. Finally, using these DEMs, a sensitivity analysis between modeled terrain slope and lidar post-spacing was conducted. Results of the sensitivity analyses showed that the deviation between mean slope and modeled mean slope decreases with finer posting density and DEM resolution. The relationship of mean slope with varying cell sizes and post-spacing suggests a linear and a logarithmic function, respectively, for all study areas. More importantly, cell size has a greater effect on mean slope than lidar posting density. Implications of these results for lumped hydrologic modeling are then postulated. Copyright Taylor & Francis Numéro de notice : A2009-389 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810802344127 En ligne : https://doi.org/10.1080/13658810802344127 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30019
in International journal of geographical information science IJGIS > vol 23 n°9-10 (september 2009) . - pp 1277 - 1295[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-09061 RAB Revue Centre de documentation En réserve L003 Disponible 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)
[article]
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'appuiRésumé : (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
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 9 (September 2009) . - pp 1093 - 1108[article]Estimation du volume de bois exploitable en montagne par scanner laser aeoporté (Lidar) / Nicolas Clouet in Géomatique expert, n° 70 (01/09/2009)
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Titre : Estimation du volume de bois exploitable en montagne par scanner laser aeoporté (Lidar) Type de document : Article/Communication Auteurs : Nicolas Clouet, Auteur ; Jean-Matthieu Monnet, Auteur ; Frédéric Berger, Auteur Année de publication : 2009 Article en page(s) : pp 32 - 37 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] bois
[Termes IGN] carte forestière
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] estimation statistique
[Termes IGN] forêt
[Termes IGN] montagne
[Termes IGN] outil d'aide à la décision
[Termes IGN] sylviculture
[Termes IGN] télémétrie laser aéroportéRésumé : (documentaliste) Cet article présente un moyen de cartographier les forêts exploitables dans des zones peu accessibles. Grâce aux traitements des données LIDAR, les différentes phases d'approches du terrain sont simplifiées. Numéro de notice : A2009-356 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29986
in Géomatique expert > n° 70 (01/09/2009) . - pp 32 - 37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 265-09051 RAB Revue Centre de documentation En réserve L003 Disponible IFN-001-P000634 RAB Revue Nogent-sur-Vernisson En réserve L003 Exclu du prêt Terrain surfaces and 3-D Landcover classification from small footprint full-waveform Lidar data: application to badlands / Frédéric Bretar in Hydrology and Earth System Sciences, HESS, vol 13 n° 8 (26/08/2009)
[article]
Titre : Terrain surfaces and 3-D Landcover classification from small footprint full-waveform Lidar data: application to badlands Type de document : Article/Communication Auteurs : Frédéric Bretar, Auteur ; Adrien Chauve , Auteur ; Jean-Stéphane Bailly, Auteur ; Clément Mallet , Auteur ; A. Jacome, Auteur Année de publication : 2009 Projets : 3-projet - voir note / Article en page(s) : pp 1531 - 1545 Note générale : Bibliographie
The authors are grateful to INSU for its support to GIS Draix through the ORE programLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] classification par séparateurs à vaste marge
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] empreinte
[Termes IGN] hydrographie de surface
[Termes IGN] lidar à retour d'onde complète
[Termes IGN] modèle numérique de terrain
[Termes IGN] occupation du sol
[Termes IGN] orthoimage couleur
[Termes IGN] risque naturel
[Termes IGN] semis de points
[Termes IGN] signal laserRésumé : (Auteur) This article presents the use of new remote sensing data acquired from airborne full-waveform lidar systems for hydrological applications. Indeed, the knowledge of an accurate topography and a landcover classification is a prior knowledge for any hydrological and erosion model. Badlands tend to be the most significant areas of erosion in the world with the highest erosion rate values. Monitoring and predicting erosion within badland mountainous catchments is highly strategic due to the arising downstream consequences and the need for natural hazard mitigation engineering.
Additionally, beyond the elevation information, full-waveform lidar data are processed to extract the amplitude and the width of echoes. They are related to the target reflectance and geometry. We will investigate the relevancy of using lidar-derived Digital Terrain Models (DTMs) and the potentiality of the amplitude and the width information for 3-D landcover classification. Considering the novelty and the complexity of such data, they are presented in details as well as guidelines to process them. The morphological validation of DTMs is then performed via the computation of hydrological indexes and photo-interpretation. Finally, a 3-D landcover classification is performed using a Support Vector Machine classifier. The use of an ortho-rectified optical image in the classification process as well as full-waveform lidar data for hydrological purposes is finally discussed.Numéro de notice : A2009-592 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5194/hess-13-1531-2009 Date de publication en ligne : 26/08/2009 En ligne : http://dx.doi.org/10.5194/hess-13-1531-2009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33545
in Hydrology and Earth System Sciences, HESS > vol 13 n° 8 (26/08/2009) . - pp 1531 - 1545[article]vol 30 n°15-16 - August 2009 - 1989-2009 remote sensing and the implementation of the Montreal protocol (Bulletin de International Journal of Remote Sensing IJRS) / Remote sensing and photogrammetry societyPermalinkAirborne Lidar: in-flight accuracy estimation / Philipp Schaer in GPS world, vol 20 n° 8 (August 2009)PermalinkLAS and LASUtility: Lidar data file format freeware / Bharat Lohani in GIM international, vol 23 n° 8 (August 2009)PermalinkThe use of LiDAR in digital surface modelling: issues and errors / C. Leigh in Transactions in GIS, vol 13 n° 4 (August 2009)PermalinkComparative analysis of SRTM-NED vegetation canopy height to LIDAR-derived vegetation canopy metrics / L. Kenyi in International Journal of Remote Sensing IJRS, vol 30 n°11-12 (June 2009)PermalinkOcclusion-based methodology for the classification of Lidar Data / A.F. Habib in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 6 (June 2009)PermalinkRelevés laser urbains par systèmes mobiles de cartographie / François Goulette in XYZ, n° 119 (juin - août 2009)PermalinkA 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)PermalinkGénération de modèles numériques de terrain par fusion de données lidar et image / Frédéric Bretar in Traitement du signal, vol 26 n° 2 (2009-2)PermalinkJournées de la recherche IGN 2009 / Anonyme in Géomatique expert, n° 68 (01/04/2009)Permalink