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Terrestrial laser scanning for delineating in-stream boulders and quantifying habitat complexity measures / J. Resop in Photogrammetric Engineering & Remote Sensing, PERS, vol 78 n° 4 (April 2012)
[article]
Titre : Terrestrial laser scanning for delineating in-stream boulders and quantifying habitat complexity measures Type de document : Article/Communication Auteurs : J. Resop, Auteur ; J. Kozarek, Auteur ; W. Hession, Auteur Année de publication : 2012 Article en page(s) : pp 363 - 371 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] analyse comparative
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] habitat animal
[Termes IGN] rivière
[Termes IGN] rocher
[Termes IGN] tachéomètre électronique
[Termes IGN] Virginie (Etats-Unis)Résumé : (Auteur) Accurate stream topography measurement is important for many ecological applications such as hydraulic modeling and habitat characterization. Habitat complexity measures are often made using visual approximations or total station (TS) surveying that can be subjective and have limited spatial resolution. Terrestrial laser scanning (TLS) can measure topography at a high resolution and accuracy. Two methods, TS surveying and TLS, were compared for measuring complex topography in a boulder-dominated 100 m forested reach of the Staunton River in Shenandoah National Park, Virginia. The mean absolute difference between the two datasets was 0.11 m with 82.3 percent of the TS data within _0.1 m of TLS. The TLS dataset was processed to remove vegetation and create a 2 cm digital elevation model (DEM). An algorithm was developed for delineating rocks within the stream channel from the DEM. A common ecological metric based on the structural complexity of the stream, percent in-stream rock cover, was calculated from the TLS dataset, and the results were compared to estimates from traditional methods. This application illustrates the potential of TLS to quantify habitat complexity measures in an automated, unbiased manner. Numéro de notice : A2012-179 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.78.4.363 En ligne : https://doi.org/10.14358/PERS.78.4.363 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31626
in Photogrammetric Engineering & Remote Sensing, PERS > vol 78 n° 4 (April 2012) . - pp 363 - 371[article]Towards all-in-one photogrammetry / Dieter Fritsch in GIM international, vol 26 n° 4 (April 2012)
[article]
Titre : Towards all-in-one photogrammetry Type de document : Article/Communication Auteurs : Dieter Fritsch, Auteur ; J. Kremer, Auteur ; A. Grimm, Auteur Année de publication : 2012 Article en page(s) : pp 18 - 23 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] données lidar
[Termes IGN] image à haute résolution
[Termes IGN] image aérienne oblique
[Termes IGN] orthoimage
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] semis de pointsRésumé : (Auteur) Modern photogrammetric camera architectures provides high-resolution imagery in nadir and oblique views. This case study sets out to prove the potential of oblique imagery to deliver dense point cloud to be used for DEM, 3D city model and true orthophoto generation - an important step towards 'all-in-one' photogrammetry. Numéro de notice : A2012-151 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31598
in GIM international > vol 26 n° 4 (April 2012) . - pp 18 - 23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-2012041 RAB Revue Centre de documentation En réserve L003 Disponible Tree topology representation from TLS point clouds using depth-first search in voxel space / A. Schilling in Photogrammetric Engineering & Remote Sensing, PERS, vol 78 n° 4 (April 2012)
[article]
Titre : Tree topology representation from TLS point clouds using depth-first search in voxel space Type de document : Article/Communication Auteurs : A. Schilling, Auteur ; A. Schmidt, Auteur ; Hans-Gerd Maas, Auteur Année de publication : 2012 Article en page(s) : pp 383 - 392 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] arbre (mathématique)
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] relation topologique
[Termes IGN] semis de points
[Termes IGN] transformation de Hough
[Termes IGN] voxelRésumé : (Auteur) For a fundamental understanding of environmental processes and for the management of forests, information on the tree structure, preferably in 3D, is vital. Therefore, we propose a method to retrieve the spatial tree structure from 3D point clouds captured by a terrestrial laser scanner. The procedure addresses dense and noisy data sets of separate trees. Our method involves a variation of the Circular Hough Transform to determine trunk positions and a sequence of operations in voxel space. The core of the approach is the depth-first search algorithm, known from graph theory, to actually recover the tree as a graph. Furthermore, we compare results obtained from the tree graph to reference measurements of forest inventory parameters. The computation time of our method for topology representation is low and the method provides a reasonably accurate approximation of the 3D tree structure. Numéro de notice : A2012-181 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.78.4.383 En ligne : https://doi.org/10.14358/PERS.78.4.383 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31628
in Photogrammetric Engineering & Remote Sensing, PERS > vol 78 n° 4 (April 2012) . - pp 383 - 392[article]Using multi-frequency radar and discrete-return LiDAR measurements to estimate above-ground biomass and biomass components in a coastal temperate forest / O. Tsui in ISPRS Journal of photogrammetry and remote sensing, vol 69 (April 2012)
[article]
Titre : Using multi-frequency radar and discrete-return LiDAR measurements to estimate above-ground biomass and biomass components in a coastal temperate forest Type de document : Article/Communication Auteurs : O. Tsui, Auteur ; Nicholas C. Coops, Auteur ; Michael A. Wulder, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 121 - 133 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] biomasse
[Termes IGN] Colombie-Britannique (Canada)
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] forêt tempérée
[Termes IGN] image radar
[Termes IGN] Pinophyta
[Termes IGN] polarimétrie radarRésumé : (Auteur) Height measurements from small-footprint discrete-return LiDAR and backscatter coefficients from C- and L-band radar were used independently and in combination to estimate above-ground component and total biomass for a coniferous temperate forest, located on Vancouver Island, British Columbia, Canada. Reference biomass data were obtained from plot-level data and used for comparison against the LiDAR and radar-based biomass models. For the LiDAR-only model, height metrics such as mean first return height and percentiles (e.g., 10th and 90th) of first returns correlated best to total above-ground and stem biomass. While percent of first returns above 2 m and percentiles (75th and 90th) of first returns height metrics correlated best to crown biomass. A comparison between above-ground components and total biomass indicate that stem biomass displayed the highest relationship with the LiDAR measurements while crown biomass showed the lowest relationship with relative root mean squared error ranging from 16% to 22%, respectively. Alternatively, the radar-only models indicated that for C-band radar, a combination of HH and VV backscatter demonstrated the most significant correlation with forest biomass compared to coherence based models with a relative root mean squared error of 53%. For L-band radar, a combination of HH and HV backscatter showed the most significant correlation compared to coherence based models with a relative root mean squared error of 44%. Exploring a mixture of C- and L-band backscatter and coherence based models revealed that a combination of C-HV and L-HV coherence magnitudes provided the best radar relationship with forest biomass with a relative root mean squared error of 35%. Also for all radar-based models, L- and C-band backscatter and coherence magnitudes were poorly correlated with individual biomass components when compared to total above-ground biomass. The addition of C- and L-band backscatter and coherence variables to the LiDAR-only biomass model was also investigated. The results showed that the integration of C-band HH backscatter to the LiDAR-only model significantly improved the relationship with forest biomass by explaining an additional 8.9% and 6.5% of the variability in total aboveground and stem biomass respectively, while C-band polarimetric entropy explained an additional 17.9% of the variability in crown biomass. Improvements in the relative root mean squared errors were also observed ranging from 7.1% to 11.7%. The study suggests that for a temperate forest dominated by coniferous stands, the addition of C-band radar variables to a best LiDAR-only linear model provides improved estimates of above-ground component and total biomass. Numéro de notice : A2012-196 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.02.009 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.02.009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31643
in ISPRS Journal of photogrammetry and remote sensing > vol 69 (April 2012) . - pp 121 - 133[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2012031 SL Revue Centre de documentation Revues en salle Disponible Digital measurements with 3D laser scanner: German scanning project / J. Rechenbach in Geoinformatics, vol 15 n° 2 (01/03/2012)
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Titre : Digital measurements with 3D laser scanner: German scanning project Type de document : Article/Communication Auteurs : J. Rechenbach, Auteur Année de publication : 2012 Article en page(s) : pp 30 - 31 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] bâtiment
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] Lidar
[Termes IGN] télémétrie laser terrestreRésumé : (Editeur) If three-dimensional measurement of structures has been very complicated, expensive and error-prone up until now, then data collection with the latest generation of 3D laser scanners is now easy, accurate and rapid. Numéro de notice : A2012-055 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31503
in Geoinformatics > vol 15 n° 2 (01/03/2012) . - pp 30 - 31[article]Extraction of building roof contours from LiDAR data using a Markov-random-field-based approach / E. Dos Santos Galvanin in IEEE Transactions on geoscience and remote sensing, vol 50 n° 3 (March 2012)PermalinkHyperspectral unmixing based on mixtures of Dirichlet components / J. Nascimento in IEEE Transactions on geoscience and remote sensing, vol 50 n° 3 (March 2012)PermalinkNumérisation et modélisation de la Caune de l'Arago / Anonyme in Géomatique expert, n° 85 (01/03/2012)PermalinkRelevé lidar du cénote Pozzo del Morro / Valerio Baiocchi in Géomatique expert, n° 85 (01/03/2012)PermalinkAutomatic stem mapping using single-scan terrestrial laser scanning / X. Liang in IEEE Transactions on geoscience and remote sensing, vol 50 n° 2 (February 2012)PermalinkAbleitung von Bewegungsstrategien zur automatisierten, vollständigen Vermessung von Innerraumszenen auf autonom navigierender Plattform / Alexander Fietz (2012)PermalinkDe l'acquisition 3D à la réalité augmentée : le cas de l'église de la Chartreuse pontificale de Villeneuve-lès-Avignon (Gard) / Aurélie Favre-Brun in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkAnalyse de données LiDAR aéroportées et apport des méthodes topographiques pour les expérimentations géophysiques de tomographie dans le cadre du projet TOMUVOL sur le site expérimental du dôme volcanique du Puy de Dôme / Camille Chanel (2012)PermalinkAnalyse qualitative et mise en oeuvre de solutions de cartographie mobiles BOAT-MAP pour le suivi de falaises inaccessibles / Simon Elling (2012)PermalinkAnalyse et traitement des données laser et images acquises sur le site de Saint-Siméon le stylite / Mariam Samaan (2012)PermalinkAttributierte Grammatiken zur Rekonstruktion und Interpretation von Fassaden / J. Schmidtwilken (2012)PermalinkAutomated detection of prehistorical rock art features aided by TLS and 2D data co-registration / Jean-Baptiste Lamontre (2012)PermalinkL-band InSAR decorrelation analysis in volcanic terrains using airborne LiDAR data and in situ measurements: The case of the Piton de la Fournaise volcano, France / Melanie Sedze (2012)PermalinkCalibration of wet tropospheric delays in GPS observation using Raman lidar measurements / Pierre Bosser (2012)PermalinkPermalinkPermalinkChange detection of trees in urban areas using multi-temporal airborne lidar point clouds / Wen Xiao (2012)PermalinkLa charte d'éthique de la 3D, réflexions et mise en application : du lidar terrestre en milieu urbain à la charte d'éthique de la 3D / Hervé Halbout in Géomatique expert, n° 84 (01/01/2012)PermalinkLa citerne El-Nabih à Alexandrie : Un exemple d'utilisation de la photogrammétrie, de la lasergrammétrie et du modèle 3D sur un chantier de fouille archéologique / Laurent Borel in Revue Française de Photogrammétrie et de Télédétection, n° 196 (Janvier 2012)PermalinkComparing small-footprint lidar and forest inventory data for single strata biomass estimation : A case study over a multi-layered mediterranean forest / António Ferraz (2012)Permalink