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Factors influencing pulse width of small footprint, full wave form airborne laser scanning data / Y.C. Lin in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 1 (January 2010)
[article]
Titre : Factors influencing pulse width of small footprint, full wave form airborne laser scanning data Type de document : Article/Communication Auteurs : Y.C. Lin, Auteur ; Jon P. Mills, Auteur Année de publication : 2010 Article en page(s) : pp 49 - 59 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] balayage laser
[Termes IGN] classification automatique
[Termes IGN] impulsion laser
[Termes IGN] lidar à retour d'onde complète
[Termes IGN] longueur d'onde
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Small footprint, full waveform airborne laser scanning provides the opportunity to derive high-resolution geometric and physical information simultaneously from a single scanner system. This study evaluates the influence of various factors on the shape of the returned waveform and investigates the possibility of improving terrain classification by applying waveform-derived information. The factors discussed are surface roughness, slope angle, scan angle, amplitude, and footprint size. It is statistically demonstrated that roughness is the most significant factor affecting pulse width, and that, over relatively smooth surfaces, there is no significant variation in pulse width behavior resulting from different footprint sizes. Pulse width also exhibits a relatively stable behavior when amplitude, range distance, or scan angle vary substantially. The overall accuracy of classification achieved by applying pulse width information over all the different land-cover types examined in this study (including scrub, hillside, single trees, and forest areas) was greater than 85 percent, with > 94 percent achieved for open vegetation areas. Physical surface information provided by small footprint waveform data is considered to be at the microscale, therefore it is recommended to combine such information with geometry (e.g., filtering algorithms) for the optimal identification of terrain points. Copyright ASPRS Numéro de notice : A2010-013 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.1.49 En ligne : https://doi.org/10.14358/PERS.76.1.49 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30209
in Photogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 1 (January 2010) . - pp 49 - 59[article]Les images de la Terre / C. Brezinski (2010)
Titre : Les images de la Terre : cosmographie, géodésie, topographie et cartographie à travers les siècles Type de document : Monographie Auteurs : C. Brezinski, Auteur Editeur : Paris : L'Harmattan Année de publication : 2010 Collection : Acteurs de la science Importance : 300 p. Format : 15 x 24 cm ISBN/ISSN/EAN : 978-2-296-11722-8 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie ancienne
[Termes IGN] Amérique (géographie physique)
[Termes IGN] Cassini, César François
[Termes IGN] Cassini, Dominique
[Termes IGN] Cassini, Jacques
[Termes IGN] Cassini, Jean Dominique
[Termes IGN] Cholesky, André Louis
[Termes IGN] histoire de la cartographie
[Termes IGN] Institut géographique national (France)
[Termes IGN] Mont-Blanc, massif du
[Termes IGN] nivellement
[Termes IGN] projection azimutale
[Termes IGN] projection conique
[Termes IGN] projection cylindrique
[Termes IGN] représentation cartographique
[Termes IGN] Service Géographique de l'Armée
[Termes IGN] Terre (planète)
[Termes IGN] triangulation (travaux de terrain)Index. décimale : 39.01 Cartographie ancienne - postérieure à 1939 et en bon état Résumé : (Editeur) L'homme, même au temps de la préhistoire, s'est toujours déplacé sur Terre, il s'est vite aperçu qu'il lui fallait dessiner son chemin, établir des cartes, et qu'il avait besoin de repères. Le ciel lui en fournissait. Mais il devait comprendre pourquoi les astres revenaient périodiquement à la même place, le Soleil en premier. La cosmographie était née. Mais cela ne suffisait pas. La Terre n'était pas plate. Quand il comprit que c'était une sphère, ou à peu près, il fallut la mesurer. Là encore, il eut recours au ciel et ce furent les débuts de la géodésie. Quand la forme de la terre fut fixée, il dut la trianguler pour obtenir des distances et des angles. Il fallut également évaluer les hauteurs pour en comprendre le relief. Enfin, on allait pouvoir commencer à la cartographier. L'aboutissement. La cartographie, avec tous les efforts qu'elle a nécessités, est une grande aventure de l'humanité. Elle s'étend sur des siècles et même des millénaires. C'est cette aventure que je veux faire partager ici en montrant ses différents aspects tant scientifiques qu'humains ainsi que l'enchaînement des idées. Note de contenu : - UN PEU DE COSMOGRAPHIE
- LA GEODESIE
- LA TOPOGRAPHIE
- LA CARTOGRAPHIE
- LES INSTITUTIONS FRANÇAISES
- UN TOPOGRAPHE FRANÇAIS : ANDRE CHOLESKY
- UNE REGION : LES ALPES ET LE MONT-BLANC
- UN CONTINENT : L'AMERIQUE
- DE QUELQUES INSTRUMENTSNuméro de notice : 20402 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63000 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20402-01 39.01 Livre Centre de documentation Cartographie Disponible 20402-02 DEP-PPC Livre Géoroom Dépôt en unité Exclu du prêt In-flight quality assessment and data processing for airborne laser scanning / Philipp Schaer (2010)
Titre : In-flight quality assessment and data processing for airborne laser scanning Type de document : Thèse/HDR Auteurs : Philipp Schaer, Auteur ; Jan Skaloud, Directeur de thèse Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2010 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 79 Importance : 166 p. Format : 20 x 30 cm ISBN/ISSN/EAN : 978-3-908440-23-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] estimation statistique
[Termes IGN] étalonnage d'instrument
[Termes IGN] étalonnage en vol
[Termes IGN] géoréférencement direct
[Termes IGN] implémentation (informatique)
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] qualité des données
[Termes IGN] semis de points
[Termes IGN] télémétrie laser aéroportéIndex. décimale : 33.80 Lasergrammétrie Résumé : (Auteur) [introduction] [...] The objectives of this research are threefold: 1. Elaborate the theoretical concepts and methodologies needed for performing fast and automated QA/QC of ALS data. This embraces the definition of a methodology to automatically assess the quality of laser measurements and to evaluate the point-cloud coverage and homogeneity. A further objective is to establish a concept to assess the accuracy of derived surface models. 2. Implement the theoretical concepts in a fully functional in-flight QA/QC tool embedded in an ALS system. This requires merging data streams from different technologies (i.e. inertial navigation, GNSS positioning, laser measurements) in real-time (RT), developing its qualitative evaluation and presenting it to the system operator. 3. Provide a thorough analysis of the system performance using data acquired under real operating conditions. The objective is to demonstrate the usefulness of the provided QC information in-flight and to determine the achievable accuracies for ALS data processed in-flight. A particular attention is payed to the evaluations of benefits using real-time Kinematics (RTK) for improving the accuracy of the RT navigation, point-cloud generation and derivation of quality metrics. [...] Note de contenu : 1 Introduction
1.1 Context
1.2 Research Objectives
1.3 Methodology
1.4 External Contributions
1.5 Thesis Outline
2 ALS Enabling Technologies
2.1 Airborne Laser Scanning
2.1.1 History of ALS Technology
2.1.2 Current in-flight QA/QC Capabilities
2.1.3 Trends in ALS
2.2 Direct Georeferencing: Basic Relations
2.3 Laser Scanner Technology
2.4 Positioning Technology
2.5 Integrated Navigation Technology
3 ALS System Calibration and Point-cloud Processing
3.1 System Calibration
3.2 Strip Adjustment
3.3 ALS Point-cloud Data Processing
3.4 Digital Elevation Models
4 Point-cloud Quality Assessment
4.1 Overview of ALS Error Sources
4.2 ALS Navigation Errors
4.3 ALS System Errors
4.4 Assessment of ALS Target Accuracy
4.5 Assessment of Scanning Geometry
4.6 Single Point Quality Indicator
4.7 Error Budget Evaluation
4.8 Use of Quality Indicators in Point-cloud Processing
5 Surface Quality Assessment
5.1 Data Coverage Analysis
5.2 Internal Data Accuracy
5.3 Height Model Data Accuracy .
6 Implementation
6.1 Handheld Airborne Mapping System
6.2 Flight Preparation
6.3 In-flight Quality Assessment Tool (IQUAL)
6.4 GPS Quality Analysis Module (GPSQUAL)
6.5 RT GPS/INS Integration Engine (GIINAV)
6.6 RT ALS Georeferencing Engine (LIEOS)
6.7 LiDAR Quality Analysis Module (LIAN)
6.8 Flight Management and Monitoring Module (HELIPOS)
7 Results and Performance Analysis
7.1 RT Trajectory and Point-cloud Accuracy
7.2 Trajectory Quality Analyses (GPSQUAL)
7.3 ALS Point-cloud Quality Analysis (LIAN)
7.4 Computational Performance
8 Conclusion and Perspectives
8.1 Summary of Contributions
8.2 Conclusions
8.3 Perspectives
Bibliography
A Derivation of Sub-matrices
B Computation of 3D Laser Footprint
C Comparison RT - PPNuméro de notice : 10368 Affiliation des auteurs : non IGN Autre URL associée : URL EPFL Thématique : IMAGERIE Nature : Thèse étrangère Note de thèse : PhD thesis : : EPFL : 2010 DOI : 10.5075/epfl-thesis-4590 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-79.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62407 Réservation
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Titre : Interference measurements of the Nummela standard baseline in 2005 and 2007 Type de document : Monographie Auteurs : Jorma Jokela, Auteur ; P. Häkli, Auteur Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 2010 Collection : Publications of the Finnish Geodetic Institute, ISSN 0085-6932 num. 144 Importance : 90 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-951-711-283-3 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie
[Termes IGN] comparateur de Vaisala
[Termes IGN] Finlande
[Termes IGN] interférence
[Termes IGN] ligne de base
[Termes IGN] mesurage électronique de distancesRésumé : (Auteur) The Nummela Standard Baseline of the Finnish Geodetic Institute is a unique national and international measurement standard for length measurements in geodesy. The design of the 864-m baseline was originally, in 1933, fitted for the calibration of 24-m invar wires to determine a uniform scale for triangulation. Since 1947, the baseline has been regularly measured with the Vaisala interference comparator. As a continuation to the impressive time series, the performance and results of the latest interference measurements in 2005 and 2007 are presented in detail in this publication. Two consecutive measurements within a short time span were necessary, since only half of the baseline could be measured in 2005, due to unfavourable weather conditions. The new results again confirm the excellent stability and unique accuracy, 9xlO"8, of the baseline. The 6-pillar baseline now serves in the calibration, testing and validation of electronic distance measurement (EDM) instruments for precise surveying and mapping and in scale transfer measurements to other geodetic baselines, test fields and local geodynamical networks. The measurements are metrologically traceable to the definition of the metre through a quartz gauge system.
This publication provides a summary of the rare measurement method and is a detailed supplement to the previously published or internal instruction manuals. First, we present the quartz gauge systems, which determine the scale in the Vaisala interference comparator. After a description of the present comparison method for the quartz gauges, the computation of the scale for the latest interference measurements is presented. For the interference measurements, the comparator must be separately constructed for every baseline. We describe the preparations and installations for this, followed by the observation and computation procedures. The abundant illustrations clarify the many stages. For further utilization of the baseline, the projection measurements are an essential part of the entire measurement. They transfer the distances between the mirror surfaces in the comparator to the distances between the permanently fixed transferring bars on the observation pillars, and, finally, to the baseline lengths between the underground benchmarks. We present the estimation of the uncertainty of measurement as standard and expanded uncertainties, combining all of the sources of the uncertainty in the traceability chain.
The standard uncertainties of the new results range from ±0.02 mm to ±0.07 mm for the lengths of the baseline sections ranging from 24 m to 864 m. The result for the length of the entire baseline, 864 122.86 mm ±0.07 mm, differs +0.11 mm from the previous result in 1996 and +0.08 mm from the first result in 1947. The largest difference between the results in 2005 and 2007 is -0.08 mm. The state-of-the-art Nummela Standard Baseline remains a world-class measurement standard of geodetic length metrology.Note de contenu : 1 Introduction
2 Landmarks in the history of the Nummela Standard Baseline
2.1 First international recognitions
2.2 Change from invar wires to EDM instruments as transfer standards
2.3 Recent construction works
2.4 Importance in the 2010s
3 Traceability chain of geodetic length measurements
4 Quartz gauges in the determination of the scale
4.1 Review of quartz gauge systems at Tuorla Observatory
4.2 Comparisons at Tuorla Observatory
4.3 Determination of the length of quartz gauge no. VIII in BTM00
5 Preparing the baseline for interference measurements
5.1 Principle of the Vaisala interference comparator
5.2 Preparing the observation pillars for interference measurements
5.3 Precise levellings - start of the measurements
5.4 Aligning the mirrors
5.5 Setting the mirrors at correct positions in the baseline direction
5.6 Installing the transferring bars onto the observation pillars
5.7 Installations on the telescope pillar
5.8 Installations on pillars 0 and 1
6 Interference observations
6.1 Observation procedure
6.2 About weather conditions
6.3 Personnel
7 Determination of corrections
7.1 Compensator corrections
7.2 Refraction correction
7.3 Corrections due to mirrors
7.4 Geometric corrections
7.5 Projection corrections
8 Computation of baseline lengths
8.1 Computation of the actual length of the quartz gauge
8.2 Results from interference observations in 2005
8.3 Results from interference observations in 2007
8.4 Final lengths
9 Estimation of uncertainty of measurement
9.1 Combined uncertainty of the lengths between the underground markers
9.2 Some supplementary analysis of uncertainty of measurement
10 Summary and conclusionsNuméro de notice : 14650 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie En ligne : https://www.maanmittauslaitos.fi/sites/maanmittauslaitos.fi/files/fgi/FGI_Publ_1 [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62678 Documents numériques
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14650_fgi-publ-144_jokela.pdfAdobe Acrobat PDF
Titre : Knowledge based building facade reconstruction from laser point clouds and images Type de document : Thèse/HDR Auteurs : Shi Pu, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2010 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 75 Importance : 119 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-319-3 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] B-Spline
[Termes IGN] base de connaissances
[Termes IGN] données laser
[Termes IGN] données localisées 3D
[Termes IGN] extraction de traits caractéristiques
[Termes IGN] façade
[Termes IGN] Pays-Bas
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] semis de points
[Termes IGN] système à base de connaissances
[Termes IGN] télémétrie laser terrestre
[Termes IGN] texturageIndex. décimale : 33.80 Lasergrammétrie Résumé : (Auteur) Various applications demand realistic 3D city models. For urban planning, analyzing in a 3D virtual reality world is much more efficient than imaging the 2D information on maps. For public security, accurate 3D building models are indispensable to make strategies during emergency situations. Navigation systems and virtual tourism also benefit from realistic city models. Manual creation of city models is undoubtedly a rather time consuming and expensive procedure. On one hand, images are for long the only data source for geometric modelling, while recovering of 3D geometries is not straightforward from 2D images. On the other hand, there are enormous amounts of objects (for example buildings) to be reconstructed, and their structures and shapes show a great variety. There is a lack of automated approaches to understand the building structures captured by data. The rapid development of cities even adds to the cost of manual city model updating. In recent years, laser scanning has been proven a successful technology for reverse engineering. The terrestrial laser point clouds are especially useful for documenting building facades. With the considerable high point density and the explicit 3D coordinates of terrestrial laser point clouds, it is possible to recover both large structures and fine details on building facades. The latest developments of mobile laser scanning technology also make it more cost-effective to take large-scale laser scanning over urban areas.
This PhD research aims at reconstructing photorealistic building facade models from terrestrial laser point clouds and close range images, with a largely automatic process. A knowledge base about building facade structures is established first, where several important building features (wall, door, protrusion, etc.) are defined and described with their geometric properties and spatial relationships. Then constraints for feature extraction are derived from the knowledge base. After a laser point cloud is segmented into planar segments by surface a growing segmentation algorithm, each segment is compared with the feature constraints to determine the most likely feature type for each segment. The feature extraction method works fine for all facade features except for windows, because there are usually insufficient laser points reflected from window glass. Instead, windows are reconstructed from the holes on the wall features. Then outline polygons or B-spline surfaces are fit to all feature segments, and the parts without laser points are hypothesized according to knowledge. A complete polyhedron model is combined from both fitted and hypothesized outlines.
Since laser data contains no colour information, the building models reconstructed from only laser data contain only geometric information such as vertices and edges. To obtain photorealistic results, textures must be mapped from images to the geometric models. The fusing of laser points and image requires accurate alignment between laser space and image space, which is accomplished after a semi-automated process. Because of the limitations of modelling methods, the geometry model reconstructed from laser points may contain many errors which would cause poor texturing effect. Therefore, significant line features extracted from images are compared with the initial model's edges, and necessary refinements are made to correct the model errors, or at least make the model edges consistent with the image lines. Finally, in the texturing stage, the texture of each model face is selected automatically from multiple images to ensure the optimal visibility. Texture errors caused by occlusions in front of a wall are also removed by analyzing the locations of the wall, the occlusions and the camera position.
Experiments with three data sets show that building reconstruction are considerably accelerated by the presented methods. Our approach is more than 10 times faster than the traditional approach when reconstructing the same buildings, and the models by our approach contain more fine details such as doors and windows. The reconstruction of wall facades and roofs are fully automatic, while some manual interactions (48 percent of the total reconstruction time) are still required for editing the fine details. It should also be faster to make global statistics (number of floors, number of entrances, etc.) and modifications (deriving models with a lower level of detail, applying pre-defined textures, etc.) later on to our models, since different model parts have been associated with the semantic labels. While the reconstruction efficiency is improved by our approach, the visualization effects of our models are also comparable to the models by the traditional approach. The future work will focus on improving the knowledge base and developing a fully automated camera parameter estimation procedure. The completeness and adaptability of the knowledge base will be especially important for the further automation of our reconstruction approach.Note de contenu : 1 Introduction
1.1 State-of-the-art of terrestrial laser scanning
1.2 Related works
1.2.1 Overview
1.2.2 Frueh et al. 2005
1.2.3 Cornelis et al. 2008
1.2.4 Ripperda2008
1.2.5 Becker 2009
1.3 Method overview
1.4 Structure of the thesis
2 Knowledge engineering and reasoning
2.1 Knowledge engineering
2.1.1 Assembling the knowledge
2.1.2 Decide on a vocabulary
2.1.3 Encode general knowledge
2.1.4 The hierarchical composition
2.2 Reasoning with the knowledge
2.3 Managing uncertainty
2.3.1 Describing the uncertainty
2.3.2 Making expected decisions
2.4 Concluding remarks
3 Feature extraction
3.1 Preprocessing
3.1.1 Spatial indexing
3.1.2 Extracting points of interest
3.2 Extraction of geometric features
3.2.1 Flat surfaces
3.2.2 Curved surfaces
3.3 Extraction of semantic features
3.3.1 Solid features extraction
3.3.2 Hole-based window extraction
3.4 Discussion
4 Geometric reconstruction
4.1 Polygon fitting
4.1.1 Least squares fitting
4.1.2 Convex polygon and concave polygon fitting
4.1.3 Minimum bounding rectangle fitting
4.2 B-spline surface fitting
4.2.1 The B-spline curve and surface
4.2.2 B-spline surface approximation
4.3 Hypotheses for parts without laser data
4.4 Results and Discussion
4.4.1 Flat surfaces
4.4.2 Curved surfaces
5 Model refinement with imagery
5.1 Method overview
5.2 Registration
5.2.1 Perspective Conversion
5.2.2 Spatial Resection
5.2.3 Relative Orientation
5.3 The model refinement
5.3.1 Extraction of Significant Lines from Images
5.3.2 Matching Model Edges with Image Lines
5.3.3 Refinement Strategy
5.4 Test cases
5.4.1 The restaurant house
5.4.2 The town hall
5.4.3 The wall with high windows
5.4.4 Summary
5.5 Conclusions and outlook
6 Texture mapping
6.1 Selecting texture images
6.1.1 Optimal image selection
6.1.2 Occlusion removal
6.2 Calculating texture coordinates
6.3 Results and discussion
6.3.1 The three joined houses
6.3.2 The house with a balcony
6.3.3 The curved walls
6.3.4 Discussion
7 Method evaluation
7.1 The reconstruction approaches
7.1.1 Our approach
7.1.2 The traditional approach
7.2 The Vlaardingen case
7.3 The Enschede case
7.4 The Esslingen case
7.5 Conclusions
8 Conclusions and recommendations
8.1 Conclusions
8.2 RecommendationsNuméro de notice : 10834 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère Note de thèse : PhD thesis : En ligne : https://www.ncgeo.nl/index.php/en/publicatiesgb/publications-on-geodesy/item/257 [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62511 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 10834-01 33.80 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible Sea surface topography and marine geoid by airborne laser altimetry and shipborne ultrasound altimetry / Philippe Limpach (2010)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)PermalinkThe building shadow problem of airborne lidar / T.Y. Shih in Photogrammetric record, vol 24 n° 128 (December 2009 - February 2010)PermalinkModelling the erectheion: extracting information from very large datasets / J. 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Wang in GIM international, vol 23 n° 2 (February 2009)PermalinkExtracting building footprint from 3D point clouds using terrestrial laser scanning at street level / Karim Hammoudi (2009)PermalinkFull-waveform topographic lidar: State-of-the-art / Frédéric Bretar in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 1 (January - February 2009)PermalinkPermalinkIFSAR and LIDAR: the best of both worlds / Intermap technologies in GEO: Geoconnexion international, vol 8 n° 1 (january 2009)PermalinkPermalinkLaser scanning and digital aerial photography: today and tomorrow, a report on the Moscow 2008 conference / Gordon Petrie in Geoinformatics, vol 12 n° 1 (01/01/2009)PermalinkPathway detection and geometrical description from ALS data in forested mountaneous area / Nicolas David (2009)PermalinkPermalinkPermalinkLaser scanning in the Tver region of Russia: surveying and 3D modeling of a high-voltage substation / S. Gorbunov in Geoinformatics, vol 11 n° 7 (01/11/2008)PermalinkAnalysis of planimetric accuracy of airborne laser scanning surveys / M. George Vosselman in Bulletin des sciences géographiques, n° 22 (octobre 2008)PermalinkLes structures archéologiques et les peuplements de la forêt domaniale de Haye analysés par laser aéroporté / Jérôme Bock in Rendez-vous techniques, n° 20 (mai 2008)PermalinkCoastal surveying techniques / C. Pennington in Geoinformatics, vol 11 n° 6 (01/09/2008)PermalinkA combined single range and single image device for low-cost measurement of building façade features / C. Ordonez in Photogrammetric record, vol 23 n° 122 (June - August 2008)Permalink3D vegetation mapping using small-footprint full-waveform airborne laser scanners / W. Wagner in International Journal of Remote Sensing IJRS, vol 29 n° 5 (March 2008)PermalinkAssessment of the influence of flying altitude and scan angle on biophysical vegetation products derived from airborne laser scanning / F. Morsdorf in International Journal of Remote Sensing IJRS, vol 29 n° 5 (March 2008)PermalinkAutomatic forest inventory parameter determination from terrestrial laser scanner data / Hans-Gerd Maas in International Journal of Remote Sensing IJRS, vol 29 n° 5 (March 2008)PermalinkForum de photogrammétrie / Anonyme in Géomatique expert, n° 61 (01/03/2008)PermalinkPermalinkCAMPINO, a skeletonization method for point cloud processing / Alexander Bucksch in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 1 (January - February 2008)PermalinkContinous mobile laser scanning / F. Zampa in GIM international, vol 22 n° 1 (January 2008)PermalinkEléments de physique pour l'imagerie aérienne et spatiale et la géodésie [diaporama pour le master PPMD] / Michel Kasser (2008)PermalinkEntwicklung eines Qualitätsmodells für die Generierung von digitalen Gelandemodellen aus airborne Laser scanning / Hans Jürg Luthy (2008)Permalink