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Auteur N.R. Goodwin |
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Development of a simulation model to predict Lidar interception in forested environments / N.R. Goodwin in Remote sensing of environment, vol 111 n° 4 (28/12/2007)
[article]
Titre : Development of a simulation model to predict Lidar interception in forested environments Type de document : Article/Communication Auteurs : N.R. Goodwin, Auteur ; Nicholas C. Coops, Auteur ; Darius S. Culvenor, Auteur Année de publication : 2007 Article en page(s) : pp 481 - 492 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] couvert forestier
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] faisceau laser
[Termes IGN] Lidar
[Termes IGN] modèle de simulation
[Termes IGN] propagation du signal
[Termes IGN] simulation numériqueRésumé : (Auteur) Airborne scanning LiDAR systems are used to predict a range of forest attributes. However, the accuracy with which this can be achieved is highly dependent on the sensor configuration and the structural characteristics of the forest examined. As a result, there is a need to understand laser light interactions with forest canopies so that LiDAR sensor configurations can be optimised to assess particular forest types. Such optimisation will not only ensure the targeted forest attributes can be accurately and consistently quantified, but may also minimise the cost of data acquisition and indicate when a survey configuration will not deliver information needs. In this paper, we detail the development and application of a model to simulate laser interactions within forested environments. The developed model, known as the LiDAR Interception and Tree Environment (LITE) model, utilises a range of structural configurations to simulate trees with variable heights, crown dimensions and foliage clumping. We developed and validated the LITE model using field data obtained from three forested sites covering a range of structural classes. Model simulations were then compared to coincident airborne LiDAR data collected over the same sites. Results indicate that the LITE model can be used to produce comparable estimates of maximum height of trees within plots (differences Numéro de notice : A2007-520 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2007.04.001 En ligne : https://doi.org/10.1016/j.rse.2007.04.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28883
in Remote sensing of environment > vol 111 n° 4 (28/12/2007) . - pp 481 - 492[article]Assessment of forest structure with airborne LiDAR and the effects of platform altitude / N.R. Goodwin in Remote sensing of environment, vol 103 n° 2 (30/07/2006)
[article]
Titre : Assessment of forest structure with airborne LiDAR and the effects of platform altitude Type de document : Article/Communication Auteurs : N.R. Goodwin, Auteur ; Nicholas C. Coops, Auteur ; Darius S. Culvenor, Auteur Année de publication : 2006 Article en page(s) : pp 140 - 152 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] altitude du capteur
[Termes IGN] analyse comparative
[Termes IGN] angle de visée
[Termes IGN] Australie
[Termes IGN] canopée
[Termes IGN] distribution spatiale
[Termes IGN] données lidar
[Termes IGN] empreinte
[Termes IGN] Eucalyptus (genre)
[Termes IGN] forêt
[Termes IGN] houppier
[Termes IGN] impulsion laser
[Termes IGN] inventaire forestier (techniques et méthodes)
[Termes IGN] sylviculture
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Airborne scanning LiDAR is a spatial technology increasingly used for forestry and environmental applications. However, the accuracy and coverage of LiDAR observations is highly dependent on both the extrinsic specifications of the LiDAR survey as well as the intrinsic effects such as the underlying forest structure. Extrinsic parameters which are set as part of the LiDAR survey include platform altitude, scan angle (half max. angle off nadir), and beam cross sectional diameter at the reflecting surface (referred to as footprint size). In this paper we investigate the effect of a number of these extrinsic parameters, including three different platform altitudes (1000, 2000, and 3000 m), two scan angles at 1000 m (10° and 15° half max. angle off nadir), and three footprint sizes (0.2, 0.4, and 0.6 m). The comparison was undertaken in eucalypt forests at three sites, varying in vegetation structure and topography within the Wedding Bells State Forest, Coffs Harbour, Australia. Results at the plot scale (40 * 90 m areas) indicate that tree heights computed from the 1000 m LiDAR data set (10° half max. angle off nadir) are well correlated with maximum plot heights (difference 0.75, p Numéro de notice : A2006-320 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.03.003 En ligne : https://doi.org/10.1016/j.rse.2006.03.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28044
in Remote sensing of environment > vol 103 n° 2 (30/07/2006) . - pp 140 - 152[article]