Descripteur
Documents disponibles dans cette catégorie (1096)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Improving the assessment of ICESat water altimetry accuracy accounting for autocorrelation / Hani Abdallah in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 (November 2011)
[article]
Titre : Improving the assessment of ICESat water altimetry accuracy accounting for autocorrelation Type de document : Article/Communication Auteurs : Hani Abdallah, Auteur ; Jean-Stéphane Bailly, Auteur ; Nicolas Baghdadi, Auteur ; Nicolas Lemarquand, Auteur Année de publication : 2011 Article en page(s) : pp 833 - 844 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] altimétrie satellitaire par laser
[Termes IGN] autocorrélation spatiale
[Termes IGN] données altimétriques
[Termes IGN] données ICEsat
[Termes IGN] Etats-Unis
[Termes IGN] filtrage du rayonnement
[Termes IGN] forme d'onde
[Termes IGN] géostatistique
[Termes IGN] Grands Lacs
[Termes IGN] incertitude géométrique
[Termes IGN] précision altimétrique
[Termes IGN] ressources en eauRésumé : (Auteur) Given that water resources are scarce and are strained by competing demands, it has become crucial to develop and improve techniques to observe the temporal and spatial variations in the inland water volume. Due to the lack of data and the heterogeneity of water level stations, remote sensing, and especially altimetry from space, appear as complementary techniques for water level monitoring. In addition to spatial resolution and sampling rates in space or time, one of the most relevant criteria for satellite altimetry on inland water is the accuracy of the elevation data. Here, the accuracy of ICESat LIDAR altimetry product is assessed over the Great Lakes in North America. The accuracy assessment method used in this paper emphasizes on autocorrelation in high temporal frequency ICESat measurements. It also considers uncertainties resulting from both in situ lake level reference data. A probabilistic upscaling process was developed. This process is based on several successive ICESat shots averaged in a spatial transect accounting for autocorrelation between successive shots. The method also applies pre-processing of the ICESat data with saturation correction of ICESat waveforms, spatial filtering to avoid measurement disturbance from the land–water transition effects on waveform saturation and data selection to avoid trends in water elevations across space. Initially this paper analyzes 237 collected ICESat transects, consistent with the available hydrometric ground stations for four of the Great Lakes. By adapting a geostatistical framework, a high frequency autocorrelation between successive shot elevation values was observed and then modeled for 45% of the 237 transects. The modeled autocorrelation was therefore used to estimate water elevations at the transect scale and the resulting uncertainty for the 117 transects without trend. This uncertainty was 8 times greater than the usual computed uncertainty, when no temporal correlation is taken into account. This temporal correlation, corresponding to approximately 11 consecutive ICESat shots, could be linked to low transmitted ICESat GLAS energy and to poor weather conditions. Assuming Gaussian uncertainties for both reference data and ICESat data upscaled at the transect scale, we derived GLAS deviations statistics by averaging the results at station and lake scales. An overall bias of -4.6 cm (underestimation) and an overall standard deviation of 11.6 cm were computed for all lakes. Results demonstrated the relevance of taking autocorrelation into account in satellite data uncertainty assessment. Numéro de notice : A2011-471 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2011.09.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2011.09.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31365
in ISPRS Journal of photogrammetry and remote sensing > vol 66 n° 6 (November 2011) . - pp 833 - 844[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2011061 SL Revue Centre de documentation Revues en salle Disponible Lidar online: Analysing earthquake damage / R. Torro in GIM international, vol 25 n° 11 (November 2011)
[article]
Titre : Lidar online: Analysing earthquake damage Type de document : Article/Communication Auteurs : R. Torro, Auteur ; J. Garcia, Auteur ; R. Garcia, Auteur Année de publication : 2011 Article en page(s) : pp 27 - 29 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] analyse diachronique
[Termes IGN] diffusion de données
[Termes IGN] dommage matériel
[Termes IGN] données lidar
[Termes IGN] Murcie (Espagne)
[Termes IGN] risque naturel
[Termes IGN] séisme
[Termes IGN] visualisation 3DRésumé : (Auteur) On 11th May 2011, two earthquakes with their epicentres in Lorca caused significant damaged in the region of Murcia, Spain. A new flight was carried out in the region three days after the earthquake to obtain more accurate Lidar data to supplement the data that was already available thanks to the PNOA project from 2009. The new Lidar data was also made available to anyone who needed it, allowing the damage to be assessed quickly and efficiently. In the case of a natural disaster, releasing data obtained both from flights beforehand and afterwards allows relevant users to create an inventory of the damage and detect any changes quickly and accurately using the appropriate tools. Numéro de notice : A2011-416 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31195
in GIM international > vol 25 n° 11 (November 2011) . - pp 27 - 29[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-2011111 RAB Revue Centre de documentation Revues en salle Disponible Multi-view dense matching supported by triangular meshes / D. Butalov in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 6 (November 2011)
[article]
Titre : Multi-view dense matching supported by triangular meshes Type de document : Article/Communication Auteurs : D. Butalov, Auteur ; P. Wernerus, Auteur ; Christian Heipke, Auteur Année de publication : 2011 Article en page(s) : pp 907 - 918 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] appariement d'images
[Termes IGN] appariement dense
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] maillage par triangles
[Termes IGN] précision infrapixellaire
[Termes IGN] reconstruction 3D
[Termes IGN] semis de points
[Termes IGN] séquence d'images
[Termes IGN] tessellationRésumé : (Auteur) We present a new procedure to compute dense 3D point clouds from a sequential set of images. This procedure is considered as a second step of a three-step algorithm for 3D reconstruction from image sequences, whose first step consists of image orientation and the last step is shape reconstruction. We assume that the camera matrices as well as a sparse set of 3D points are available and we strive for obtaining a dense and reliable 3D point cloud. Three novel ideas are presented: (1) for sparse tracking and triangulation, the search space for correspondences is reduced to a line segment by means of known camera matrices and disparity ranges are provided by triangular meshes from the already available points; (2) triangular meshes from extended sets of points are used for dense matching, because these meshes help to reconstruct points in weakly textured areas and present a natural way to obtain subpixel accuracy; (3) two non-local optimization methods, namely, 1D dynamic programming along horizontal lines and semi-global optimization were employed for refinement of local results obtained from an arbitrary number of images. All methods were extensively tested on a benchmark data set and an infrared video sequence. Both visual and quantitative results demonstrate the effectiveness of our algorithm. Numéro de notice : A2011-475 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2011.06.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2011.06.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31369
in ISPRS Journal of photogrammetry and remote sensing > vol 66 n° 6 (November 2011) . - pp 907 - 918[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2011061 SL Revue Centre de documentation Revues en salle Disponible A volumetric approach to population estimation using lidar remote sensing / Zhong Lu in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 11 (November 2011)
[article]
Titre : A volumetric approach to population estimation using lidar remote sensing Type de document : Article/Communication Auteurs : Zhong Lu, Auteur ; J. Im, Auteur ; L. Quackenbush, Auteur Année de publication : 2011 Article en page(s) : pp 1145 - 1156 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] Denver
[Termes IGN] détection du bâti
[Termes IGN] données lidar
[Termes IGN] estimation statistique
[Termes IGN] habitat urbain
[Termes IGN] ilot
[Termes IGN] lasergrammétrie
[Termes IGN] population urbaine
[Termes IGN] recensement démographique
[Termes IGN] régression
[Termes IGN] volume (grandeur)
[Termes IGN] zone urbaineRésumé : (Auteur) This research investigated the applicability of lidar data for estimating population at the census block level using a volumetric approach. The study area, near the urban downtown area of Denver, Colorado, was selected since it includes dense distribution of different types of residential buildings. A modified morphological building detection algorithm was proposed to extract buildings from the lidar-derived surfaces. The extraction results showed that the modified morphological building detection algorithm can effectively recover building pixels occluded by nearby trees. The extracted buildings were further refined to residential buildings using parcel data. Two approaches (i.e., area- and volume-based) to population estimation were investigated at the census block level. Four regression models (i.e., simple linear regression, multiple linear regression, regression tree using one variable, and regression tree using multiple variables) were used to identify the relationship between census population and the area or volume information of the residential buildings. The volume-based models over-whelmingly outperformed the area-based models in the study area, and the models using multiple variables yielded more accurate estimation than the single variable models. The volume-based regression tree model using multiple variables yielded the most accurate estimations: R2 = 0.89, RMSE = 21 people, and RRMSE = 26.8 percent in the calibration site; and R2 = 0.80, RMSE = 27 people, and RRMSE = 30.1 percent in the validation site. As the results show, the volumetric approach using lidar remote sensing is effective for population estimation in regions with heterogeneous housing characteristics. Numéro de notice : A2011-448 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.77.11.1145 En ligne : https://doi.org/10.14358/PERS.77.11.1145 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31226
in Photogrammetric Engineering & Remote Sensing, PERS > vol 77 n° 11 (November 2011) . - pp 1145 - 1156[article]Riding the rails (2) / N. Studnicka in GEO: Geoconnexion international, vol 10 n° 9 (october 2011)
[article]
Titre : Riding the rails (2) Type de document : Article/Communication Auteurs : N. Studnicka, Auteur Année de publication : 2011 Article en page(s) : pp 38 - 40 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] instrumentation Riegl
[Termes IGN] lasergrammétrie
[Termes IGN] réseau ferroviaire
[Termes IGN] semis de points
[Termes IGN] système de numérisation mobile
[Termes IGN] télémétrie laser terrestre
[Termes IGN] traitement de donnéesRésumé : (Editeur) In last month's issue, we described the physical steps involved in putting Riegl's mobile laser scanning system to the test in Hungarian railroad survey. We conclude by examining the 3D point cloud software processing method and results obtained. Numéro de notice : A2011-367 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31146
in GEO: Geoconnexion international > vol 10 n° 9 (october 2011) . - pp 38 - 40[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 062-2011091 SL Revue Centre de documentation Revues en salle Disponible Development of a new laser triangulation system based on an optical frame of reference / A. Abzal in Photogrammetric record, vol 26 n° 135 (September - November 2011)PermalinkLes principes fondamentaux de la lasergrammétrie terrestre : Systèmes et caractéristiques (partie 1/2) / Tania Landes in XYZ, n° 128 (septembre - novembre 2011)PermalinkLa réalité augmentée au service de la mise en valeur du patrimoine culturel / Didier Happe in XYZ, n° 128 (septembre - novembre 2011)PermalinkRiding the rails / N. Studnicka in GEO: Geoconnexion international, vol 10 n° 8 (september 2011)PermalinkTerrestrial laser scan error in the presence of dense ground vegetation / S. Coveney in Photogrammetric record, vol 26 n° 135 (September - November 2011)PermalinkEmpirical comparison of full-waveform Lidar algorithms: range extraction and discrimination performance / C. Parrish in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 8 (August 2011)PermalinkMulti-level filtering segmentation to measure individual tree parameters based on Lidar data: Application to a mountainous forest with heterogeneous stands / Cédric Vega in International journal of applied Earth observation and geoinformation, vol 13 n° 4 (August 2011)PermalinkTaiwanese Lidar project / J. Liu in GIM international, vol 25 n° 8 (August 2011)PermalinkBuilding roof modeling from airborne laser scanning data based on level set approach / Kamyoung Kim in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 4 (July - August 2011)PermalinkLe lidar, outil performant pour cartographier la hauteur des peuplements forestiers / Jérôme Bock in Rendez-vous techniques, n° 32 (printemps 2011)PermalinkScanning geometry: Influencing factor on the quality of terrestrial laser scanning points / S. Soudarissanane in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 4 (July - August 2011)PermalinkA slope-based method for matching elevation surfaces / D. Streutker in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 7 (July 2011)PermalinkLa tête d'Henri IV [4] modélisée / Michel Ravelet in Géomètre, n° 2083 (juillet - aout 2011)PermalinkComparaison lasergrammétrie - photogrammétrie pour la mesure de l'érosion de pierres de façade : Abbatiale de Manglieu, Puy-de-Dôme / Franck Vautier in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkGeological and geotechnical mapping / A. Wilkinson in Geoinformatics, vol 14 n° 4 (01/06/2011)PermalinkLasergrammétrie terrestre / Tania Landes in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkMission d'acquisition aérienne lidar pour les applications thématiques en écologie du paysage : le cas des coteaux de Gascogne / Sylvie Ladet in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkOptimiser la performance de calcul pour la cartographie en temps réel avec un laser scanner aéroporté / Jan Skaloud in Géomatique suisse, vol 109 n° 6 (juin 2011)PermalinkRelevés lasergrammétriques et calibration sur calcite de morphologies externes de spéléothèmes pour une étude paléo-sismologique du Liban / Benjamin Sadier in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkTLS data denoising by range image processing / Eddy Smigiel in Photogrammetric record, vol 26 n° 134 (June - August 2011)PermalinkMultitemporal laser scanner-based observation of the Mt. Vesuvius crater: Characterization of overall geometry and recognition of landslide events / Arianna Pesci in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 3 (May - June 2011)PermalinkPoint-cloud preservation plans / L. Teng in GIM international, vol 25 n° 5 (May 2011)PermalinkSmall-footprint Lidar estimations of sagebrush canopy characteristics / J. Mitchell in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 5 (May 2011)PermalinkHigh definition surveying and laser scanning : Leica Geosystems' Geoff Jacobs / J. Triglav in Geoinformatics, vol 14 n° 3 (01/04/2011)PermalinkPermalinkAutomated detection of branch dimensions in woody skeletons of fruit tree canopies / Alexander Bucksch in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 3 (March 2011)PermalinkComparaison de PhotoModeler Scanner et David Laserscanner pour l'obtention de nuages de points denses / Emmanuel Alby in XYZ, n° 126 (mars - mai 2011)PermalinkEtude des couverts forestiers par inversion de formes d'onde Lidar à l'aide du modèle de transfert radiatif DART développé par le CESBIO / A. Ueberschlag in XYZ, n° 126 (mars - mai 2011)PermalinkForestry applications for satellite lidar remote sensing / J. Rosette in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 3 (March 2011)PermalinkFull waveform-based analysis for forest type information derivation from large footprint spaceborne lidar data / Junjie Zhang in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 3 (March 2011)PermalinkIncremental segmentation of lidar point clouds with an octree-structured voxel space / M. Wang in Photogrammetric record, vol 26 n° 133 (March - May 2011)PermalinkMise en valeur numérique et reconstruction 3D du théâtre gallo-romain de Mandeure / Pierre Assali in XYZ, n° 126 (mars - mai 2011)PermalinkQuality analysis on 3D building models reconstructed from airborne laser scanning data / Sander J. Elberink in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 2 (March - April 2011)Permalink3D building model reconstruction from multi-view aerial imagery and Lidar data / Liang Cheng in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 2 (February 2011)PermalinkSwedish Lidar Project: New Nationwide Elevation Model / Y. Petersen in GIM international, vol 25 n° 2 (February 2011)PermalinkPermalinkConditional random fields for urban scene : Classification with full waveform LiDAR Data / Joachim Niemeyer (2011)PermalinkPermalinkGrotte de Marsoulas : la renaissance en 3D / M. Mayo in Géomètre, n° 2077 (janvier 2011)PermalinkLe laser et ses applications / Pascal Besnard (2011)PermalinkLiDAR surveys in the upper Rhine Valley: New insights for archeological and landscape applications / F. Basoge in Revue Française de Photogrammétrie et de Télédétection, n° 193 (Janvier 2011)PermalinkRecalage d'un nuage de points de scanner laser terrestre avec une image de bâtiment / Abdelhamid Bennis (2011)PermalinkStochastic Geometry for Image Analysis, ch 9. Some applications to image processing: pattern recognition / shape recognition / Florent Lafarge (2011)PermalinkLes techniques de positionnement au service des paléontologues, les travaux de l'ENSG sur la Caune de l'Arago / Laure Chandelier in Revue Française de Photogrammétrie et de Télédétection, n° 193 (Janvier 2011)PermalinkA marked point process for modeling lidar waveforms / Clément Mallet in IEEE Transactions on image processing, vol 19 n° 12 (December 2010)Permalink