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données localiséesSynonyme(s)spatial data ;données géospatiales ;données géographiques données à référence spatialeVoir aussi |
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Perceptions of virtual globes, volunteered geographical information and spatial data infrastructures / A. Cooper in Geomatica, vol 64 n° 1 (March 2010)
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Titre : Perceptions of virtual globes, volunteered geographical information and spatial data infrastructures Type de document : Article/Communication Auteurs : A. Cooper, Auteur ; Serena Coetzee, Auteur ; D. Kourie, Auteur Année de publication : 2010 Article en page(s) : pp 73 - 88 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] analyse de données
[Termes IGN] données localisées des bénévoles
[Termes IGN] globe virtuel
[Termes IGN] infrastructure mondiale des données localisées
[Termes IGN] participation du public
[Termes IGN] sondage statistique
[Termes IGN] web 2.0Résumé : (Auteur) The Internet has spawned the development of virtual communities or virtual social networks which generate and share information with one another, and with the public at large. Volunteered geographical information (VGI) refers to user-generated content that is made available as base data on public mapping websites or as third party data overlaid on virtual globes such as Google Earth and NASA World Wind. Several attempts have been made to determine and categorise what motivates the contributors of VGI. However, while the contributors themselves might generally understand VGI, this is not necessarily the case amongst geographical information professionals at large. We used a questionnaire to explore this by gathering data on the perceptions held by geographical information professionals of virtual globes, VGI, and spatial data infrastructures (SDI). These perceptions are important because they influence how VGI and virtual globes will be used in the future for more formal SDI environments of official mapping agencies and other official custodians of spatial data. The questionnaire was administered at a meeting in Addis Ababa, Ethiopia, in April 2009 and at another in Ekurhuleni, South Africa, in June 2009. The results are reported on here. Some of the results confirm previous research, while others raise questions that warrant further research. Numéro de notice : A2010-265 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : 10.5623/geomat-2010-0007 En ligne : https://cdnsciencepub.com/doi/abs/10.5623/geomat-2010-0007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30459
in Geomatica > vol 64 n° 1 (March 2010) . - pp 73 - 88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 035-2010011 RAB Revue Centre de documentation En réserve L003 Disponible Real-time registration of airborne laser with sub-decimeter accuracy / Jan Skaloud in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 2 (March - April 2010)
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Titre : Real-time registration of airborne laser with sub-decimeter accuracy Type de document : Article/Communication Auteurs : Jan Skaloud, Auteur ; Philipp Schaer, Auteur ; P. Tome, Auteur ; Yannick Stebler, Auteur Année de publication : 2010 Article en page(s) : pp 208 - 217 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] covariance
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] GPS en mode différentiel
[Termes IGN] GPS-INS
[Termes IGN] lasergrammétrie
[Termes IGN] mesurage de phase
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] précision absolue
[Termes IGN] précision décimétrique
[Termes IGN] précision du positionnement
[Termes IGN] semis de points
[Termes IGN] télémétrie laser aéroporté
[Termes IGN] temps réelRésumé : (Auteur) This paper presents a methodology for the precise registering of airborne laser data directly in flight with an accuracy that is sufficient for the majority of derived products, such as digital terrain models. We first present the strategy that integrates GPS/INS/LiDAR data for generating laser point clouds directly in flight and analyzes their accuracy. The latter requires the implementation of a functional covariance propagation on-line for all the system components (i.e. trajectory, laser, system calibration) to which influences of scanning geometry are added at the end of a flight line. The study of scanning geometry necessitates the classification of vegetation and coarse estimation of the terrain normal. This is achieved by a method that we formerly proposed for off-line quality analysis. The second part of the paper focuses on the positioning component. In high resolution scanning performed close to the terrain, the absolute accuracy of the resulting point cloud depends mainly on the quality of the trajectory which is related to the type of GPS solution (e.g. absolute positioning, DGPS, RTK). To reach sub-decimeter accuracy for the point cloud in the real-time, an RTK-GPS solution is needed. This requires the establishment of a communication link for the transmission of GPS corrections (or measurements). We analyze the usability of RTK-GPS/ALS acquired during several flights using different communication methods in the particular context of helicopter based missions. We focus mainly on the exploitation of nation-wide reference GNSS networks and confirm experimentally that the real-time registration of airborne laser data is feasible with sub-decimeter accuracy. Such quality is sufficient not only for a wide range of applications, but it also opens new opportunities for monitoring missions that require a short reaction time. Finally, we concentrate on situations when the phase and code corrections cannot be transmitted, and the quality of the differential carrier-phase positioning needs to be predicted. We validate the previously introduced indicators of positioning quality by simulated degradation of the input data. Copyright ISPRS Numéro de notice : A2010-093 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.12.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.12.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30289
in ISPRS Journal of photogrammetry and remote sensing > vol 65 n° 2 (March - April 2010) . - pp 208 - 217[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2010021 SL Revue Centre de documentation Revues en salle Disponible Segmentation and reconstruction of polyhedral building roofs from aerial lidar points clouds / A. Sampath in IEEE Transactions on geoscience and remote sensing, vol 48 n° 3 Tome 2 (March 2010)
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Titre : Segmentation and reconstruction of polyhedral building roofs from aerial lidar points clouds Type de document : Article/Communication Auteurs : A. Sampath, Auteur ; J. Shan, Auteur Année de publication : 2010 Article en page(s) : pp 1554 - 1567 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] analyse de groupement
[Termes IGN] cohérence géométrique
[Termes IGN] détection du bâti
[Termes IGN] diagramme de Voronoï
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] intégrité topologique
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] segmentation
[Termes IGN] semis de points
[Termes IGN] similitude
[Termes IGN] toitRésumé : (Auteur) This paper presents a solution framework for the segmentation and reconstruction of polyhedral building roofs from aerial LIght Detection And Ranging (lidar) point clouds. The eigenanalysis is first carried out for each roof point of a building within its Voronoi neighborhood. Such analysis not only yields the surface normal for each lidar point but also separates the lidar points into planar and nonplanar ones. In the second step, the surface normals of all planar points are clustered with the fuzzy k-means method. To optimize this clustering process, a potential-based approach is used to estimate the number of clusters, while considering both geometry and topology for the cluster similarity. The final step of segmentation separates the parallel and coplanar segments based on their distances and connectivity, respectively. Building reconstruction starts with forming an adjacency matrix that represents the connectivity of the segmented planar segments. A roof interior vertex is determined by intersecting all planar segments that meet at one point, whereas constraints in the form of vertical walls or boundary are applied to determine the vertices on the building outline. Finally, an extended boundary regularization approach is developed based on multiple parallel and perpendicular line pairs to achieve topologically consistent and geometrically correct building models. This paper describes the detail principles and implementation steps for the aforementioned solution framework. Results of a number of buildings with diverse roof complexities are presented and evaluated. Numéro de notice : A2010-272 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2009.2030180 Date de publication en ligne : 03/11/2009 En ligne : https://doi.org/10.1109/TGRS.2009.2030180 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30466
in IEEE Transactions on geoscience and remote sensing > vol 48 n° 3 Tome 2 (March 2010) . - pp 1554 - 1567[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2010031B RAB Revue Centre de documentation En réserve L003 Disponible Terrain modeling from Lidar range data in natural landscapes: a predictive and Bayesian framework / Frédéric Bretar in IEEE Transactions on geoscience and remote sensing, vol 48 n° 3 Tome 2 (March 2010)
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Titre : Terrain modeling from Lidar range data in natural landscapes: a predictive and Bayesian framework Type de document : Article/Communication Auteurs : Frédéric Bretar, Auteur ; Nesrine Chehata , Auteur
Année de publication : 2010 Article en page(s) : pp 1568 - 1578 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] altimètre laser
[Termes IGN] classification bayesienne
[Termes IGN] données lidar
[Termes IGN] filtre de Kalman
[Termes IGN] modèle numérique de terrain
[Termes IGN] montagne
[Termes IGN] semis de pointsRésumé : (Auteur) The Earth's topography, including vegetation and human-made features, reduced to a virtual 3-D representation is a key geographic layer for any extended development or risk management project. Processed from multiple aerial images or from airborne lidar systems, the 3-D topography is first represented as a point cloud. This paper deals with the generation of digital terrain models (DTMs) in natural landscapes. We present a global methodology for estimating the terrain height by deriving a predictive filter paradigm. Under the assumption that the terrain topography (elevation and slope) is regular in a neighboring system, a predictive filter combines linearly the predicted topographic values and the effective measured values. In this paper, such a filter is applied to 3-D lidar data which are known to be of high elevation accuracy. The algorithm generates an adaptive local geometry wherein the elevation distribution of the point cloud is analyzed. Since local terrain elevations depend on the local slope, a predictive filter is first applied on the slopes and then on the terrain elevations. The algorithm propagates through the point cloud following specific rules in order to optimize the probability of computing areas containing terrain points. Considered as an initial surface, the previous DTM is finally regularized in a Bayesian framework. Our approach is based on the definition of an energy function that manages the evolution of a terrain surface. The energy is designed as a compromise between a data attraction term and a regularization term. The minimum of this energy corresponds to the final terrain surface. The methodology is discussed, and some conclusive results are presented on vegetated mountainous areas. Numéro de notice : A2010-273 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2009.2032653 Date de publication en ligne : 04/12/2009 En ligne : https://doi.org/10.1109/TGRS.2009.2032653 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30467
in IEEE Transactions on geoscience and remote sensing > vol 48 n° 3 Tome 2 (March 2010) . - pp 1568 - 1578[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2010031B RAB Revue Centre de documentation En réserve L003 Disponible The imagina 2010 conference report / Roger Longhorn in GEO: Geoconnexion international, vol 9 n° 3 (march 2010)
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Titre : The imagina 2010 conference report Type de document : Article/Communication Auteurs : Roger Longhorn, Auteur Année de publication : 2010 Article en page(s) : pp 44 - 46 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] architecture
[Termes IGN] données localisées 3D
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] outil d'aide à la décision
[Termes IGN] urbanisme
[Termes IGN] visualisation 3DRésumé : (Auteur) Our editor reports on the exciting Imagina 2010 3D technology conference in Monaco. Copyright Geo:Geoconnexion Numéro de notice : A2010-044 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30240
in GEO: Geoconnexion international > vol 9 n° 3 (march 2010) . - pp 44 - 46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 062-2010031 SL Revue Centre de documentation Revues en salle Disponible Using simulated Terrestrial Laser Scanning to analyse errors in high-resolution scan data of irregular surfaces / R. Hodge in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 2 (March - April 2010)
PermalinkVolunteered geographic information to authoritative databases: linking contributor motivations to program characteristics / David Coleman in Geomatica, vol 64 n° 1 (March 2010)
PermalinkMultidimensional Map Algebra: design and implementation of a spatio-temporal GIS processing language / J. Mennis in Transactions in GIS, vol 14 n° 1 (February 2010)
PermalinkYOBILIDAR: 3D Spatial indexing for Lidar DATA / D. Laefer in GIM international, vol 24 n° 2 (February 2010)
Permalink3D segmentation of forest structure using an adaptive mean shift based procedure / António Ferraz (2010)
PermalinkPermalinkAccuracy 2010 : Proceedings of the Ninth international symposium on spatial accuracy assessment in natural resources and environmental sciences, Leicester, UK, 20 - 23 juillet 2010 / Nicholas J. Tate (2010)
PermalinkPermalinkEn Allemagne des bénévoles dressent la cartographie libre / Olivier Razemon in Géomètre, n° 2066 (janvier 2010)
PermalinkAlternative methodologies for the internal quality control of parallele LIDAR strips / A. Habib in IEEE Transactions on geoscience and remote sensing, vol 48 n° 1 Tome 1 (January 2010)
PermalinkAnalyse de données lidar à retour d'onde complète pour la classification en milieu urbain = Analysis of Full-Waveform lidar data for urban area mapping / Clément Mallet (2010)
PermalinkAnalyse des évolutions sociodémographiques et des changements territoriaux en France de 1962 à 2006 / Daouda Kassie (2010)
PermalinkAssessing the accuracy of 'crowdsourced' data and its itegration with official spatial data sets / Maythm Al-Bakri (2010)
PermalinkAssessment of terrain elevation derived from satellite laser altimetry over mountainous forest areas using airborne lidar data / Q. Chen in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 1 (January - February 2010)
PermalinkPermalinkPermalinkPermalinkComment qualifier la précision et les notions d'échelle dans les métadonnées de nos séries de données [localisées] ? [version 3] / Commission de validation de données pour l'information spatialisée (2010)
PermalinkCoupling polarimetric L-Band insar and airborne lidar to characterize the geomorphological deformations in the piton de la fournaise volcano / Essam Heggy (2010)
PermalinkEffectiveness of cartogram for the representation of spatial data / Hui Sun in Cartographic journal (the), vol 47 n° 1 (January 2010)
PermalinkÉmergence de zones conflits dans deux modèles de généralisation cartographique multi-agents / Cécile Duchêne (2010)
PermalinkEnriching a 3D world with synthetic and visible information about the distribution of points of interest / Mickaël Brasebin (2010)
PermalinkEtude des erreurs systématiques liées à la détermination du géocentre par les mesures DORIS / Marie-Line Gobinddass (2010)
PermalinkPermalinkFeature-based cartographic modelling / K. French in International journal of geographical information science IJGIS, vol 24 n°1-2 (january 2010)
PermalinkA general framework for using aggregation in visual exploration of movement data / Gennady Adrienko in Cartographic journal (the), vol 47 n° 1 (January 2010)
PermalinkPermalinkPermalinkPermalinkIn-flight quality assessment and data processing for airborne laser scanning / Philipp Schaer (2010)
PermalinkInitial investigations for modeling interior utilities within 3D Geo Context: Transforming IFC- interior utility to CityGML/UtilityNetworkADE / Ihab Hijazi (2010)
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PermalinkPermalinkPermalinkPermalinkMap mashups, Web 2.0 and the GIS revolution / Michael Batty in Annals of GIS, vol 16 n° 1 ([01/01/2010])
PermalinkPermalinkModélisation de façades par analyse conjointe d'images terrestres et de données laser / Antoine Pinte (2010)
PermalinkModelling three-dimensional geoscientific datasets with the discrete Voronoi diagram / T. Van Der Putte (2010)
PermalinkModelling vertical error in LiDAR-derived digital elevation models / F. Aguilar in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 1 (January - February 2010)
PermalinkPermalinkA network representation of raster land-cover patches / L. De Cola in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 1 (January 2010)
PermalinkPhotogrammetric computer vision and image analysis, ISPRS Commission 3 symposium, Saint-Mandé, 1-3 septembre 2010, volume 1. Papers accepted on the basis of peer-reviewed full manuscripts / Nicolas Paparoditis (2010)
PermalinkPhotogrammetric computer vision and image analysis: ISPRS Commission 3 symposium, Saint-Mandé, 1-3 septembre 2010, volume 2. Papers accepted on the basis of abstracts / Nicolas Paparoditis (2010)
PermalinkPermalinkProceedings of the GIS Research UK, 18th annual conference, University College London, 14th - 16th April 2010 / Muki M. Haklay (2010)
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PermalinkProceedings Silvilaser 2010, The 10th International Conference on LiDAR Applications for Assessing Forest Ecosystems, September 14th - 17th, 2010 Freiburg, Germany / Barbara Koch (2010)
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PermalinkPermalinkPermalinkPermalinkSAGEO '10, conférence internationale de géomatique et d'analyse spatiale, Toulouse, 17, 18 et 19 novembre 2010 / Claude Monteil (2010)
PermalinkPermalinkTerrestrial laser scanner self-calibration: correlation sources and their mitigation / Derek D. Lichti in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 1 (January - February 2010)
PermalinkA two-pass random forests classification of airborne Lidar and image data on urban scenes / Li Guo (2010)
PermalinkUsing building permits to monitor disaster recovery: a spatio-temporal case study of coastal Mississipi following hurricane Katrina / J. Stevenson in Cartography and Geographic Information Science, vol 37 n° 1 (January 2010)
PermalinkPermalink3D builbing reconstruction from lidar based on a cell decomposition approach / Martin Kada (01/12/2009)
PermalinkAugmenting the Iterative Closest Point (ICP) alignment algorithm with intensity / S. Hefford in Geomatica, vol 63 n° 4 (December 2009)
PermalinkCartographie marine et informatique : les systèmes informatiques pour la rédaction des cartes marines (papier électronique) / E. Le Guen in Le monde des cartes, n° 202 (décembre 2009)
PermalinkCartographie des temporalités dans le domaine des risques / Aurélie Arnaud in Le monde des cartes, n° 202 (décembre 2009)
PermalinkComprendre les dynamiques urbaines : l'utilisation de bases de données topographiques et la création de bases de données spatio-temporelles / Julien Perret in Le monde des cartes, n° 202 (décembre 2009)
PermalinkPermalinkEfficient MaxCount and threshold operators of moving objects / S. Anderson in Geoinformatica, vol 13 n° 4 (December 2009)
PermalinkLes enjeux de mise en oeuvre des infrastructures de services web SIG "inspirées" / Virginia Martin in Géomatique expert, n° 72 (01/12/2009)
PermalinkEvacuating remote areas: team linkage via GIS and satellite telecom / B. Palade in GIM international, vol 23 n° 12 (December 2009)
PermalinkFinding anomalies in high-density Lidar point clouds / J. Harrison in Geomatica, vol 63 n° 4 (December 2009)
PermalinkGénération automatisée d'environnements géographiques virtuels informés : modélisation topologique et abstraction géométrique d'environnements géographiques / M. Mekni in Revue internationale de géomatique, vol 19 n° 4 (décembre 2009 – février 2010)
PermalinkImproving DORIS geocenter time series using an empirical rescaling of solar radiation pressure models / Marie-Line Gobinddass in Advances in space research, vol 44 n° 11 (1 December 2009)
PermalinkImproving GPS localization with vision and inertial sensing / A. Fakih in Geomatica, vol 63 n° 4 (December 2009)
PermalinkDe la modélisation tridimensionnelle au SIG 3D / Mirko Peripimeno in Géomatique expert, n° 72 (01/12/2009)
PermalinkRelevé, modélisation 3D et intégration SIG d'ouvrages d'art pour le projet Genève 3D / David Desbuisson in XYZ, n° 121 (décembre 2009 - février 2010)
PermalinkPermalinkA simplified analytical model for a-priori Lidar pointpositioning error estimation and a review of Lidar error source / Mihaela Triglav Cekada in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 12 (December 2009)
PermalinkThe building shadow problem of airborne lidar / T.Y. Shih in Photogrammetric record, vol 24 n° 128 (December 2009 - February 2010)
PermalinkPermalinkPermalinkvol 45 n° 4 - novembre 2009 - Aerial and spatial archeology : From the historical photographs to lidar (part 1) (Bulletin de Photo interprétation, European journal of applied remote sensing) / Rosa Lasaponara
PermalinkEvaluating the temporal and spatial urban expansion patterns of Guangzhou from 1979 to 2003 by remote sensing and GIS methods / F. Fan in International journal of geographical information science IJGIS, vol 23 n°11-12 (november 2009)
PermalinkGeneration and application of rules for quality dependent facade reconstruction / S. Becker in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 6 (November - December 2009)
PermalinkModelling the erectheion: extracting information from very large datasets / J. Beraldin in GIM international, vol 23 n° 11 (November 2009)
PermalinkPermalinkPermalinkQuality assessment of linear data / S. Seo in International journal of geographical information science IJGIS, vol 23 n°11-12 (november 2009)
PermalinkPermalinkAdvanced full-waveform lidar data echo detection: assessing quality of derived terrain and tree height models in an alpine coniferous forest / Adrien Chauve in International Journal of Remote Sensing IJRS, vol 30 n° 19 (October 2009)
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Permalinkvol 30 n° 19 - October 2009 - ForestSat 2007, [actes], operational tools in forestry using remote sensing techniques, Montpellier, 5 - 7 November 2007 (Bulletin de International Journal of Remote Sensing IJRS) / Ronald E. McRoberts
PermalinkHomogeneous reprocessing of the EUREF permanent network : first experiences and comparisons / A. Kenyeres in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)
PermalinkSmall-footprint laser scanning simulator for system validation, error assessment, and algorithm development / Antero Kukko in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 10 (October 2009)
PermalinkEffects of Lidar post-spacing and DEM resolution to mean slope estimation / T. Edwin in International journal of geographical information science IJGIS, vol 23 n°9-10 (september 2009)
PermalinkError budget of Lidar systems and quality control of the derived data / A. Habib in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 9 (September 2009)
PermalinkEstimation du volume de bois exploitable en montagne par scanner laser aeoporté (Lidar) / Nicolas Clouet in Géomatique expert, n° 70 (01/09/2009)
PermalinkEvaluation du bilan d'érosion et de dépôt des sols au pré-Rif (Maroc) en utilisant le modèle RUSLE, la télédétection et l'analyse spatiale / Abdelkader El Garouani in Revue internationale de géomatique, vol 19 n° 3 (septembre - novembre 2009)
PermalinkExploration de l'écosystème Open Source à Nantes / N. Klein in SIG la lettre, n° 109 (septembre 2009)
PermalinkPermalinkInvestigating tropospheric effects and seasonal position variations in GPS and DORIS time-series from the Nepal Himalaya / Mireille Flouzat in Geophysical journal international, vol 178 n° 3 (September 2009)
PermalinkUne maquette temps réel sur la baie du Mont St Michel : mariage du SIG et de la 3D au service du grand paysage / Hélène Durand in Géomatique expert, n° 70 (01/09/2009)
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