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Terrestrial laser scan error in the presence of dense ground vegetation / S. Coveney in Photogrammetric record, vol 26 n° 135 (September - November 2011)
[article]
Titre : Terrestrial laser scan error in the presence of dense ground vegetation Type de document : Article/Communication Auteurs : S. Coveney, Auteur ; A. Stewart Fotheringham, Auteur Année de publication : 2011 Article en page(s) : pp 307 - 324 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] détection d'erreur
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] erreur géométrique
[Termes IGN] flore locale
[Termes IGN] krigeage
[Termes IGN] marais salé
[Termes IGN] masque de végétation
[Termes IGN] semis de points
[Termes IGN] sol nu
[Termes IGN] source d'erreur
[Termes IGN] télémétrie laser terrestre
[Termes IGN] validation des donnéesRésumé : (Auteur) Terrestrial laser scanning (TLS) data-sets are seeing increasing use in geology, geomorphology, forestry and urban mapping. The ease of use, affordability and operational flexibility of TLS suggest that demand for it is likely to increase in large-scale mapping studies. However, its advantages may remain restricted to specific environments, because of difficulties in defining bare-ground level in the presence of ground-level vegetation. This paper seeks to clarify the component contributions to TLS elevation error deriving from vegetation occlusion, scan co-registration error, point cloud georeferencing error and target position definition in TLS point cloud data. A multi-scan single-returns TLS point cloud data-set of very high resolution (~250 points/m2) was acquired for an 11 hectare area of open, substantially flat and 100% vegetated coastal saltmarsh, providing data for the empirical quantification of TLS error. Errors deriving from the sources discussed are quantified, clarifying the potential proportional contribution of vegetation to other error sources. Initial data validation is applied to the TLS point cloud data after application of a local-lowest-point selection process, and repeat validation tests are applied to the resulting filtered point cloud after application of a kriging-based error adjustment and data fusion with GPS. The final results highlight the problem of representing bare ground effectively within TLS data captured in the presence of dense ground vegetation and clarify the component contributions of elevation error deriving from surveying and data processing. Numéro de notice : A2011-386 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00647.x Date de publication en ligne : 14/09/2011 En ligne : https://doi.org/10.1111/j.1477-9730.2011.00647.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31165
in Photogrammetric record > vol 26 n° 135 (September - November 2011) . - pp 307 - 324[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-2011031 RAB Revue Centre de documentation En réserve L003 Disponible Multi-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)
[article]
Titre : Multi-level filtering segmentation to measure individual tree parameters based on Lidar data: Application to a mountainous forest with heterogeneous stands Type de document : Article/Communication Auteurs : Cédric Vega , Auteur ; Sylvie Durrieu, Auteur Année de publication : 2011 Projets : TOSCA ExFOLIO / Durrieu, Sylvie Article en page(s) : pp 646 - 656 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] extraction de la végétation
[Termes IGN] forêt alpestre
[Termes IGN] hauteur des arbres
[Termes IGN] houppier
[Termes IGN] lasergrammétrie
[Termes IGN] modèle numérique de surface de la canopée
[Termes IGN] Pinus nigra
[Termes IGN] troncRésumé : (auteur) This paper presents a method for individual tree crown extraction and characterisation from a canopy surface model (CSM). The method is based on a conventional algorithm used for localising LM on a smoothed version of the CSM and subsequently for modelling the tree crowns around each maximum at the plot level. The novelty of the approach lies in the introduction of controls on both the degree of CSM filtering and the shape of elliptic crowns, in addition to a multi-filtering level crown fusion approach to balance omission and commission errors. The algorithm derives the total tree height and the mean crown diameter from the elliptic tree crowns generated. The method was tested and validated on a mountainous forested area mainly covered by mature and even-aged black pine (Pinus nigra ssp. nigra [Arn.]) stands. Mean stem detection per plot, using this method, was 73.97%. Algorithm performance was affected slightly by both stand density and heterogeneity (i.e. tree diameter classes’ distribution). The total tree height and the mean crown diameter were estimated with root mean squared error values of 1.83 m and 1.48 m respectively. Tree heights were slightly underestimated in flat areas and overestimated on slopes. The average crown diameter was underestimated by 17.46% on average. Numéro de notice : A2011-565 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.jag.2011.04.002 En ligne : https://doi.org/10.1016/j.jag.2011.04.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76409
in International journal of applied Earth observation and geoinformation > vol 13 n° 4 (August 2011) . - pp 646 - 656[article]Taiwanese Lidar project / J. Liu in GIM international, vol 25 n° 8 (August 2011)
[article]
Titre : Taiwanese Lidar project Type de document : Article/Communication Auteurs : J. Liu, Auteur ; L. Fei, Auteur Année de publication : 2011 Article en page(s) : pp 23 - 25 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] grande échelle
[Termes IGN] image aérienne
[Termes IGN] orthophotoplan numérique
[Termes IGN] risque naturel
[Termes IGN] Taïwan
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Nearly three-quarters of the territory of Taiwan and 95% of its population are exposed to frequent hazard. In the aftermath of typhoon Morakot that scourged Southern Taiwan on 8th and 9th august 2009, causing the worst flooding in a century, the authorities realized that the country was dreadfully lacking in detailed, accurate and current elevation data, as well as aerial imagery covering the entire territory (36 000 km2). In response, a national mapping program spanning 2010 to 2015 was launched with the aim of simultaneously capturing the entire country airborne Lidar and digital imagery. The authors discuss specifications, status and challenges posed by this large-scale, long-term project. Numéro de notice : A2011-335 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31114
in GIM international > vol 25 n° 8 (August 2011) . - pp 23 - 25[article]Building 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)
[article]
Titre : Building roof modeling from airborne laser scanning data based on level set approach Type de document : Article/Communication Auteurs : Kamyoung Kim, Auteur ; J. Shan, Auteur Année de publication : 2011 Article en page(s) : pp 484 - 497 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données laser
[Termes IGN] hauteur du bâti
[Termes IGN] modélisation 3D
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] segmentation d'image
[Termes IGN] télémétrie laser aéroporté
[Termes IGN] toitRésumé : (Auteur) This paper presents a novel approach to building roof modeling, including roof plane segmentation and roof model reconstruction, from airborne laser scanning data. Segmentation is performed by minimizing an energy function formulated as multiphase level set. The energy function is minimized when each segment corresponds to one or several roof plans of the same normal vector. With this formulation, maximum n regions are segmented at a time by applying log2n level set functions. The roof ridges or step edges are then delineated by the union of the zero level contours of the level set functions. In the final step of segmentation, coplanar and parallel roof segments are separated into individual roof segments based on their connectivity and homogeneity. To reconstruct a 3D roof model, roof structure points are determined by intersecting adjacent roof segments or line segments of building boundary and then connected based on their topological relations inferred from the segmentation result. As a global solution to the segmentation problem, the proposed approach determines multiple roof segments at the same time, which leads to topological consistency among the segment boundaries. The paper describes the principle and solution of the multiphase level set approach and demonstrates its performance and properties with two airborne laser scanning data sets. Numéro de notice : A2011-299 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2011.02.007 En ligne : https://doi.org/10.1016/j.isprsjprs.2011.02.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31078
in ISPRS Journal of photogrammetry and remote sensing > vol 66 n° 4 (July - August 2011) . - pp 484 - 497[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2011041 SL Revue Centre de documentation Revues en salle Disponible A slope-based method for matching elevation surfaces / D. Streutker in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 7 (July 2011)
[article]
Titre : A slope-based method for matching elevation surfaces Type de document : Article/Communication Auteurs : D. Streutker, Auteur ; N. Glenn, Auteur ; R. Shresta, Auteur Année de publication : 2011 Article en page(s) : pp 721 - 732 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] analyse comparative
[Termes IGN] appariement de données localisées
[Termes IGN] appariement géométrique
[Termes IGN] données lidar
[Termes IGN] hauteur de vol
[Termes IGN] Idaho (Etats-Unis)
[Termes IGN] pente
[Termes IGN] reconstruction d'objet
[Termes IGN] recouvrement d'imagesRésumé : (Auteur) A method is presented for the co-registration of overlapping elevation surfaces based on local slope analysis. Comparison and statistical analysis of local slope versus local elevation difference between overlapping surfaces allows for the estimation of both vertical and horizontal offsets between the two surfaces. This method is then used to re-align the flightlines of a Light Detection and Ranging (lidar) dataset collected in southern Idaho resulting in a dataset with significantly higher accuracy than the original. The relative horizontal accuracy is doubled, with a final value of approximately 25 to 30 cm, while the relative vertical accuracy is improved by several centimeters to a final valm of approximately 6 to 7 cm. Numéro de notice : A2011-315 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.77.7.743 En ligne : https://doi.org/10.14358/PERS.77.7.743 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31094
in Photogrammetric Engineering & Remote Sensing, PERS > vol 77 n° 7 (July 2011) . - pp 721 - 732[article]The Harvest experiment LIDAR system : Water level measurement device comparison for Jason-1 and Jason-2/OSTM calibration / S. Washburn in Marine geodesy, vol 34 n° 3-4 (July - december 2011)PermalinkAnalyse combinée de données GPS et lidar Raman acquises lors de la campagne COPS pour l’amélioration du positionnement vertical par GPS / Martin Blocquaux in XYZ, n° 127 (juin - août 2011)PermalinkLa fabuleuse histoire de la Tête de Maori de Rouen et sa numérisation / S. Varea in XYZ, n° 127 (juin - août 2011)PermalinkGeological and geotechnical mapping / A. Wilkinson in Geoinformatics, vol 14 n° 4 (01/06/2011)Permalinkn° 12 - 01/06/2011 - Images et modèles 3D en milieux naturels (Bulletin de Collection EDYTEM. cahiers de géographie) / Laboratoire EDYTEMPermalinkIntegration of panoramic hyperspectral imaging with terrestrial lidar data / T. Kurz in Photogrammetric record, vol 26 n° 134 (June - August 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)PermalinkTLS data denoising by range image processing / Eddy Smigiel in Photogrammetric record, vol 26 n° 134 (June - August 2011)PermalinkModélisation de façades par analyse conjointe d'images terrestres et de données laser / Antoine Pinte in Revue Française de Photogrammétrie et de Télédétection, n° 194 (Mai 2011)Permalink