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Assessing tree dendrometrics in young regenerating plantations using terrestrial laser scanning / Ying Li in Annals of Forest Science, vol 71 n° 4 (June 2014)
[article]
Titre : Assessing tree dendrometrics in young regenerating plantations using terrestrial laser scanning Type de document : Article/Communication Auteurs : Ying Li, Auteur ; Carsten Hess, Auteur ; Henrik Von Wehrden, Auteur ; Werner Härdtle, Auteur ; Goddert Von Oheimb, Auteur Année de publication : 2014 Article en page(s) : pp 453 - 462 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] arbre (flore)
[Termes IGN] Chine
[Termes IGN] données dendrométriques
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] hauteur des arbres
[Termes IGN] plantation forestière
[Termes IGN] taillis
[Termes IGN] télémétrie laser terrestreRésumé : (Auteur) Context : Terrestrial laser scanning (TLS) provides a valuable tool for the retrieval of detailed individual-tree structural parameters, but has never previously been applied to young stands under field conditions.
Aims: The aim was to explore the performance of TLS in a young tree plantation located in a heterogeneous environment in subtropical China.
Methods: We investigated 438 young trees for congruence between direct field and TLS measurements of total tree height, stem diameter at ground height, and length and height of the longest branch using correlation tests. We applied generalized linear models to examine whether congruence was affected by the observed structural parameter or extrinsic factors (e.g., potential occlusion, point cloud quality).
Results: TLS made it possible to detect trees higher than 40cm. The TLS-retrieved data were highly congruent with the data obtained from direct measurements. The poor descriptions of stems and branches of some individuals of small-sized and leaf-on tree species were due to occlusion by ground vegetation and leaf-on branches. Observed structural parameter and extrinsic factors did not explain the variance between the two approaches.
Conclusion: TLS proved to be a promising tool for high-resolution, non-destructive analyses of tree dendrometrics in young regenerating plantations.Numéro de notice : A2014-284 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-014-0358-4 Date de publication en ligne : 29/01/2014 En ligne : https://doi.org/10.1007/s13595-014-0358-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33187
in Annals of Forest Science > vol 71 n° 4 (June 2014) . - pp 453 - 462[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 016-2014041 SL Revue Centre de documentation Revues en salle Exclu du prêt Big scanning on a small scale / Stephen Richardson in GEO: Geoconnexion international, vol 13 n° 6 (june 2014)
[article]
Titre : Big scanning on a small scale Type de document : Article/Communication Auteurs : Stephen Richardson, Auteur Année de publication : 2014 Article en page(s) : pp 26 - 28 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] balayage laser
[Termes IGN] courant marin
[Termes IGN] érosion hydrique
[Termes IGN] littoral
[Termes IGN] petite échelle
[Termes IGN] vagueRésumé : (Auteur) Understanding the way that waves, currents and sediments interact with coastal structures, and the potential impact they can have, is far from simple. Stephen Richardson explains how 3D laser scanners are helping to improve the design of these structures and how use of this technology on a small scale can deliver big benefits. Numéro de notice : A2014-305 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33208
in GEO: Geoconnexion international > vol 13 n° 6 (june 2014) . - pp 26 - 28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 062-2014061 SL Revue Centre de documentation Revues en salle Disponible Urban-Tree-Attribute update using multisource single-tree inventory / Ninni Saarinen in Forests, vol 5 n° 5 (May 2014)
[article]
Titre : Urban-Tree-Attribute update using multisource single-tree inventory Type de document : Article/Communication Auteurs : Ninni Saarinen, Auteur ; Mikko Vastaranta, Auteur ; Ville Kankare, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 1032 - 1052 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] arbre (flore)
[Termes IGN] arbre urbain
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] hauteur des arbres
[Termes IGN] Helsinki
[Termes IGN] houppier
[Termes IGN] milieu urbainRésumé : (auteur) The requirements for up-to-date tree data in city parks and forests are increasing, and an important question is how to keep the digital databases current for various applications. Traditional map-updating procedures, such as visual interpretation of digital aerial images or field measurements using tachymeters, are either inaccurate or expensive. Recently, the development of laser-scanning technology has opened new opportunities for tree mapping and attributes updating. For a detailed measurement and attributes update of urban trees, we tested the use of a multisource single-tree inventory (MS-STI) for heterogeneous urban forest conditions. MS-STI requires an existing tree map as input information in addition to airborne laser-scanning (ALS) data. In our study, the tested input tree map was produced by terrestrial laser scanning (TLS) and by using a Global Navigation Satellite System (GNSS). Tree attributes were either measured from ALS or predicted by using metrics extracted from ALS data. Stem diameter-at-breast height (DBH) was predicted and compared to the field measures, and tree height and crown area were directly measured from ALS data at the two different urban-forest areas. The results indicate that MS-STI can be used for updating urban-forest attributes. The accuracies of DBH estimations were improved compared to the existing attribute information in the city of Helsinki’s urban-tree register. In addition, important attributes, such as tree height and crown dimensions, were extracted from ALS and added as attributes to the urban-tree register. Numéro de notice : A2014-761 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.3390/f5051032 En ligne : https://doi.org/10.3390/f5051032 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76419
in Forests > vol 5 n° 5 (May 2014) . - pp 1032 - 1052[article]Bayesian approach to tree detection based on airborne laser scanning data / Timo Lähivaara in IEEE Transactions on geoscience and remote sensing, vol 52 n° 5 tome 1 (May 2014)
[article]
Titre : Bayesian approach to tree detection based on airborne laser scanning data Type de document : Article/Communication Auteurs : Timo Lähivaara, Auteur ; Aku Seppänen, Auteur ; Jari Vauhkonen, Auteur ; Lauri Korhonen, Auteur ; Timo Tokola, Auteur ; Matti Maltamo, Auteur Année de publication : 2014 Article en page(s) : pp 2690 - 2699 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] détection automatique
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] estimation bayesienne
[Termes IGN] forêt boréale
[Termes IGN] hauteur des arbres
[Termes IGN] modélisation 3DRésumé : (Auteur) In this paper, we consider a computational method for detecting trees on the basis of airborne laser scanning (ALS) data. In the approach, locations, heights, and crown shapes of trees are tracked automatically by fitting multiple 3-D crown height models to ALS data of a field plot. The estimates are computed with an iterative reconstruction method based on Bayesian inversion paradigm. The formulation allows for utilizing prior information on tree shapes in the estimation. Here, the prior models are written based on field measurement data and allometric models for tree shapes. The feasibility of the approach is tested with ALS and field data from a managed boreal forest. The algorithm found 70.2% of the trees in the area, which is a clear improvement compared to a usual 2.5D crown delineation approach (53.1% of the trees detected). Numéro de notice : A2014-262 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2264548 Date de publication en ligne : 27/06/2013 En ligne : https://doi.org/10.1109/TGRS.2013.2264548 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33165
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 5 tome 1 (May 2014) . - pp 2690 - 2699[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014051A RAB Revue Centre de documentation En réserve L003 En circulation
Exclu du prêtStepwise decomposition of full-waveform data based on Levenberg Marquardt / Pengcheng Li in Studies in Surveying and Mapping Science, vol 2 (2014)
[article]
Titre : Stepwise decomposition of full-waveform data based on Levenberg Marquardt Type de document : Article/Communication Auteurs : Pengcheng Li, Auteur ; Qing Xu, Auteur ; Pingyuan Cui, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 14 - 19 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] algorithme de Levenberg-Marquardt
[Termes IGN] compensation par moindres carrés
[Termes IGN] décomposition de Gauss
[Termes IGN] données lidar
[Termes IGN] données localisées 3DRésumé : (auteur) Compared with traditional airborne LiDAR, the advantage of full-waveform LiDAR is that it digitalizes the full backscattered information. Waveform decomposition is the most important part of waveform data processing. A method of stepwise decomposition of full-waveform data based on Levenberg Marquardt has been proposed, which employs stepwise decomposition and uses Levenberg Marquardt, which is a Gaussian function with non-linear least squares fitting algorithm, to obtain precise fitting waveform. Experiment results with 4 different waveform data acquired by RIEGL airborne LiDAR have proved that this method is available and effective. Numéro de notice : A2014-778 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78788
in Studies in Surveying and Mapping Science > vol 2 (2014) . - pp 14 - 19[article]Documents numériques
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Stepwise decomposition of full-waveform dataAdobe Acrobat PDF Automated stem curve measurement using terrestrial laser scanning / Xinlian Liang in IEEE Transactions on geoscience and remote sensing, vol 52 n° 3 (March 2014)PermalinkJoining-up the dots / George Skrobanski in GEO: Geoconnexion international, vol 13 n° 3 (march 2014)PermalinkNumérisation 3D de la grotte ornée des faux (Dordogne) : apport à l'archéologie et à la cartographie du champ magnétique / Pierre Grussenmeyer in XYZ, n° 138 (mars - mai 2014)PermalinkRange-based versus automated markerless image-based techniques for rock art documentation / José Luis Lerma in Photogrammetric record, vol 29 n° 145 (March - May 2014)PermalinkA study-based ranking of LiDAR data visualization schemes aided by georectified aerial images / Suddasheel Ghosh in Cartography and Geographic Information Science, vol 41 n° 2 (March 2014)PermalinkLa topographie au service de la gendarmerie nationale : fixation de l'état des lieux dans un contexte criminalistique (concept et moyen) / Hervé Daudigny in XYZ, n° 138 (mars - mai 2014)PermalinkAirborne LiDAR and terrestrial laser scanning derived vegetation obstruction factors for visibility models / Jayson Murgoitio in Transactions in GIS, vol 18 n° 1 (February 2014)PermalinkColorisation de nuages de points 3D par recalage dense d’images numériques / Nathalie Crombez in Traitement du signal, vol 31 n° 1-2 (2014-1-2)PermalinkFiltering airborne lidar data by modified white top-hat transform with directional edge constraints / Yong Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 80 n° 2 (February 2014)PermalinkMultiple-entity based classification of airborne laser scanning data in urban areas / S. Xu in ISPRS Journal of photogrammetry and remote sensing, vol 88 (February 2014)Permalink