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Le positionnement inertiel et ses applications terrestres, souterraines et sous-marines / B. Flacelière in XYZ, n° 125 (décembre 2010 - février 2011)
[article]
Titre : Le positionnement inertiel et ses applications terrestres, souterraines et sous-marines Type de document : Article/Communication Auteurs : B. Flacelière, Auteur Année de publication : 2010 Article en page(s) : pp 48 - 54 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Topographie moderne
[Termes IGN] canalisation
[Termes IGN] centrale inertielle
[Termes IGN] filtre de Kalman
[Termes IGN] GPS assisté pour la navigation (technologies)
[Termes IGN] GPS-INS
[Termes IGN] lever souterrain
[Termes IGN] métrologie dimensionelle
[Termes IGN] positionnement inertiel
[Termes IGN] sous-boisRésumé : (Auteur) Le Système de navigation inertielle (INS) est-il un concept nouveau ? Pas du tout, des INS étaient à bord des fusées de Robert Goddard et V2 de Wernher von Broun ! Pourquoi diable l'INS n'a-t-il pas été largement utilisé parmi la communauté des topographes ? Les raisons principales ont probablement été les suivantes : coût prohibitif, restrictions militaires, taille énorme, approche boîte noire et dérives difficiles à maîtriser. Depuis une vingtaine d'années, les prix ont baissé, les tailles et poids se sont réduits, et l'INS a trouvé sa place quand le GNSS n'est pas opérationnel ou bien en appoint du GNSS. On peut citer les relevés sous la canopée, le positionnement sous-marin, l'inspection des conduites ou égouts, le positionnement en environnement urbain. Finalement, pour un topographe arrivant juste du XXe siècle, ce serait incroyable de voir qu'un téléphone portable est maintenant équipé d'un accéléromètre 3 axes et parfois d'un gyromètre, ainsi que d'un récepteur GPS. Cet article présente donc l'historique du positionnement inertiel, ses utilisations et ses performances. Numéro de notice : A2010-522 Affiliation des auteurs : non IGN Thématique : FORET/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30714
in XYZ > n° 125 (décembre 2010 - février 2011) . - pp 48 - 54[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 112-2010041 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Documents numériques
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Le positionnement inertiel et ses applications terrestres, souterraines - pdf éditeurAdobe Acrobat PDF Effect of corn on C-an L-band radar backscatter: a correction method for soil moisture retrieval / A. Joseph in Remote sensing of environment, vol 114 n° 11 (15/11/2010)
[article]
Titre : Effect of corn on C-an L-band radar backscatter: a correction method for soil moisture retrieval Type de document : Article/Communication Auteurs : A. Joseph, Auteur ; R. Van Der Velde, Auteur ; P. O'neill, Auteur ; R. Lang, Auteur ; T. Gish, Auteur Année de publication : 2010 Article en page(s) : pp 2417 - 2430 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] angle d'incidence
[Termes IGN] bande C
[Termes IGN] bande L
[Termes IGN] biomasse
[Termes IGN] humidité du sol
[Termes IGN] maïs (céréale)
[Termes IGN] polarimétrie radar
[Termes IGN] rétrodiffusion
[Termes IGN] teneur en eau de la végétationRésumé : (Auteur) This paper discusses the effects of vegetation on C- (4.75 GHz) and L- (1.6 GHz) band backscattering (Ó) measured throughout a growth cycle at incidence angles of 15, 35 and 55°. The utilized Ó data set was collected by a truck mounted scatterometer over a corn field and is supported by a comprehensive set of ground measurements, including soil moisture and vegetation biomass. Comparison of Ó measurement against simulations by the Integral Equation Method (IEM) surface scattering model (Fung et al., 1992) shows that the Ó measurements are dominated either by an attenuated soil return or by scattering from vegetation depending on the antenna configuration and growth stage. Further, the measured Ó is found to be sensitive to soil moisture even at peak biomass and large incidence angles, which is attributed to scattering along the soil-vegetation pathway. For the simulation of C-band Ó and the retrieval of soil moisture two methods have been applied, which are the semi-empirical water cloud model (Attema & Ulaby, 1978) and a novel method. This alternative method uses the empirical relationships between the vegetation water content (W) and the ratio of the bare soil and the measured Ó to correct for vegetation. It is found that this alternative method is superior in reproducing the measured Ó as well as retrieving soil moisture. The highest retrieval accuracies are obtained at a 35° incidence angle leading to RMSD's of 0.044 and 0.037 m3 m- 3 for the HH and VV-polarization, respectively. In addition, the sensitivity of these soil moisture retrievals to W and surface roughness parameter uncertainties is investigated. Numéro de notice : A2010-400 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2010.05.017 En ligne : https://doi.org/10.1016/j.rse.2010.05.017 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30593
in Remote sensing of environment > vol 114 n° 11 (15/11/2010) . - pp 2417 - 2430[article]Use of high-resolution satellite imagery in an integrated model to predict the distribution of shade coffee tree hybrid zones / C. Gomez in Remote sensing of environment, vol 114 n° 11 (15/11/2010)
[article]
Titre : Use of high-resolution satellite imagery in an integrated model to predict the distribution of shade coffee tree hybrid zones Type de document : Article/Communication Auteurs : C. Gomez, Auteur ; M. Mangeas, Auteur ; Marcel Petit, Auteur ; Christina Corbane, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 2731 - 2744 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse texturale
[Termes IGN] carte thématique
[Termes IGN] classification dirigée
[Termes IGN] classification par arbre de décision
[Termes IGN] classification par réseau neuronal
[Termes IGN] Coffea (genre)
[Termes IGN] couvert forestier
[Termes IGN] image à haute résolution
[Termes IGN] image panchromatique
[Termes IGN] image Quickbird
[Termes IGN] modèle numérique de surface
[Termes IGN] Nouvelle-Calédonie
[Termes IGN] ombre
[Termes IGN] pansharpening (fusion d'images)
[Termes IGN] prédictionRésumé : (Auteur) In New Caledonia (21°S, 165°E), shade-grown coffee plantations were abandoned for economic reasons in the middle of the 20th century. Coffee species (Coffea arabica, C. canephora and C. liberica) were introduced from Africa in the late 19th century, they survived in the wild and spontaneously cross-hybridized. Coffee species were originally planted in native forest in association with leguminous trees (mostly introduced species) to improve their growth. Thus the canopy cover over rustic shade coffee plantations is heterogeneous with a majority of large crowns, attributed to leguminous trees. The aim of this study was to identify suitable areas for coffee inter-specific hybridization in New Caledonia using field based environmental parameters and remotely sensed predictors. Due to the complex structure of tropical vegetation, remote sensing imagery needs to be spatially accurate and to have the appropriate bands for monitoring vegetation cover. Quickbird panchromatic (black and white) imagery at 0.6 to 0.7 m spatial resolutions and multispectral imagery at 2.4 m spatial resolution were pansharpened and used for this study. The two most suitable remotely sensed indicators, canopy heterogeneity and tree crown size, were acquired by the sequential use of tree crown detection (neural network), image processing (such as textural analysis) and classification. All models were supervised and trained on learning data determined by human expertise. The final model has two remotely sensed indicators and three physical parameters based on the Digital Elevation Model: elevation, slope and water flow accumulation. Using these five predictive variables as inputs, two modelling methods, a decision tree and a neural network, were implemented. The decision tree, which showed 96.9% accuracy on the test set, revealed the involvement of ecological parameters in the hybridization of Coffea species. We showed that hybrid zones could be characterized by combinations of modalities, underlining the complexity of the environment concerned. For instance, forest heterogeneity and large crown size, steep slopes (> 53.5%) and elevation between 194 and 429 m asl, are favourable factors for Coffea inter-specific hybridization. The application of the neural network on the whole area gave a predictive map that distinguished the most suitable areas by means of a nonlinear continuous indicator. The map provides a confidence level for each area. The most favourable areas were geographically localized, providing a clue for the detection and conservation of favourable areas for Coffea species neo-diversity. Numéro de notice : A2010-402 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2010.06.007 En ligne : https://doi.org/10.1016/j.rse.2010.06.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30595
in Remote sensing of environment > vol 114 n° 11 (15/11/2010) . - pp 2731 - 2744[article]A low-cost multi-sensoral mobile mapping system and its feasibility for tree measurements / Anttoni Jaakkola in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 6 (November - December 2010)
[article]
Titre : A low-cost multi-sensoral mobile mapping system and its feasibility for tree measurements Type de document : Article/Communication Auteurs : Anttoni Jaakkola, Auteur ; Antero Kukko, Auteur ; X. Yu, Auteur ; Juha Hyyppä, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 514 - 522 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] arbre (flore)
[Termes IGN] capteur aérien
[Termes IGN] chambre DTC
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] drone
[Termes IGN] géoréférencement direct
[Termes IGN] GPS-INS
[Termes IGN] lasergrammétrie
[Termes IGN] lidar topographique
[Termes IGN] rayonnement infrarouge thermique
[Termes IGN] semis de points
[Termes IGN] spectromètre
[Termes IGN] système de numérisation mobile
[Termes IGN] télémètre laser aéroporté
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) This paper presents a novel low-cost mini-UAV-based laser scanning system, which is also capable of performing car-based mobile mapping. The quality of the system and its feasibility for tree measurements was tested using the system’s laser scanner. The system was constructed as a modular measurement system consisting of a number of measurement instruments: a GPS/IMU positioning system, two laser scanners, a CCD camera, a spectrometer and a thermal camera. An Ibeo Lux and a Sick LMS151 profile laser were integrated into the system to provide dense point clouds; intensities of the reflected echoes can also be obtained with the Sick LMS. In our tests, when using a car as a platform, the pole-type object extraction algorithm which was developed resulted in 90% completeness and 86% correctness. The heights of pole-type objects were obtained with a bias of -1.6 cm and standard deviation of 5.4 cm. Using a mini-UAV as the platform, the standard deviation of individual tree heights was about 30 cm. Also, a digital elevation model extraction was tested with the UAV data, resulting in a height offset of about 3.1 cm and a standard deviation of 9.2 cm. With a multitemporal point cloud, we demonstrated a method to derive the biomass change of a coniferous tree with an R2 value of 0.92. The proposed system is capable of not only recording point cloud data giving the geometry of the objects, but also simultaneously collecting image data, including overlapping images and the intensity of laser backscatter, as well as hyperspectral and thermal data. Therefore we believe that the system is feasible for new algorithm and concept development and for basic research, especially when data is recorded multitemporally. Numéro de notice : A2010-484 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.08.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.08.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30677
in ISPRS Journal of photogrammetry and remote sensing > vol 65 n° 6 (November - December 2010) . - pp 514 - 522[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2010061 SL Revue Centre de documentation Revues en salle Disponible Status and future of laser scanning, synthetic aperture radar and hyperspectral remote sensing data for forest biomass assessment / B. Koch in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 6 (November - December 2010)
[article]
Titre : Status and future of laser scanning, synthetic aperture radar and hyperspectral remote sensing data for forest biomass assessment Type de document : Article/Communication Auteurs : B. Koch, Auteur Année de publication : 2010 Article en page(s) : pp 581 - 590 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] biomasse (combustible)
[Termes IGN] cartographie thématique
[Termes IGN] données laser
[Termes IGN] données polarimétriques
[Termes IGN] forêt
[Termes IGN] image hyperspectrale
[Termes IGN] image radar moirée
[Termes IGN] polarimétrie radarRésumé : (Auteur) This is a review of the latest developments in different fields of remote sensing for forest biomass mapping. The main fields of research within the last decade have focused on the use of small footprint airborne laser scanning systems, polarimetric synthetic radar interferometry and hyperspectral data. Parallel developments in the field of digital airborne camera systems, digital photogrammetry and very high resolution multispectral data have taken place and have also proven themselves suitable for forest mapping issues. Forest mapping is a wide field and a variety of forest parameters can be mapped or modelled based on remote sensing information alone or combined with field data. The most common information required about a forest is related to its wood production and environmental aspects. In this paper, we will focus on the potential of advanced remote sensing techniques to assess forest biomass. This information is especially required by the REDD (reducing of emission from avoided deforestation and degradation) process. For this reason, new types of remote sensing data such as fullwave laser scanning data, polarimetric radar interferometry (polarimetric synthetic aperture interferometry, PolInSAR) and hyperspectral data are the focus of the research. In recent times, a few state-of-the-art articles in the field of airborne laser scanning for forest applications have been published. The current paper will provide a state-of-the-art review of remote sensing with a particular focus on biomass estimation, including new findings with fullwave airborne laser scanning, hyperspectral and polarimetric synthetic aperture radar interferometry. A synthesis of the actual findings and an outline of future developments will be presented. Numéro de notice : A2010-490 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.09.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.09.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30683
in ISPRS Journal of photogrammetry and remote sensing > vol 65 n° 6 (November - December 2010) . - pp 581 - 590[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2010061 SL Revue Centre de documentation Revues en salle Disponible Conserver la biodiversité intra-spécifique des arbres forestiers en France et en Europe / Eric Collin in Sciences, eaux & territoires, n° 3 ([22/10/2010])PermalinkFocus : Élaboration des indicateurs de biodiversité de la publication « Les indicateurs de gestion durable des forêts françaises », difficultés et perspectives / Nabila Hamza in Sciences, eaux & territoires, n° 3 ([22/10/2010])PermalinkDu simple relevé de végétation à la gestion des données sur la biodiversité : problèmes liées à la construction d’une base de données sur la flore alpine / Thomas Spiegelberger in Sciences, eaux & territoires, n° 3 ([22/10/2010])PermalinkModelling forest management within a global vegetation model - Part 1: Model structure and general behaviour / V. Bellassen in Ecological modelling, vol 221 n° 20 (octobre 2010)Permalinkn° 11 - 01/09/2010 - Actes du colloque "Panorama de la dendrochronologie en France", Digne-les-Bains, 8-10 octobre 2009 (Bulletin de Collection EDYTEM. cahiers de géographie) / Laurent AstradePermalinkApport de la dendrogéomorphologie pour la reconstruction spatio-temporelle des avalanches / Christophe Corona in Collection EDYTEM. cahiers de géographie, n° 11 (01/09/2010)PermalinkLe couvert forestier, marqueur spatio-temporel de l'activité d'un glissement de terrain / Jérôme Lopez Saez in Collection EDYTEM. cahiers de géographie, n° 11 (01/09/2010)PermalinkEstimation du potentiel des données lidar multiécho pour l'étude de la végétation des marais salés : Etude du biais des données lidar acquises au-dessus de la baie du Mont-Saint-Michel et recherche d'une méthode de correction / Clélia Bilodeau in Revue Française de Photogrammétrie et de Télédétection, n° 192 (Septembre 2010)Permalinkvol 31 n° 17 - 18 - September 2010 - Pan ocean remote sensing : oceanic manifestation of global changes (Bulletin de International Journal of Remote Sensing IJRS) / G. LevyPermalinkLe SIG, un outil pour le zonage des forêts à fonction de protection contre les avalanches et les chutes de blocs / Nicolas Clouet in Géomatique expert, n° 76 (01/09/2010)Permalink