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Generation of a spatial information system for architecture with laserscanning data / Luigi Fregonese (2009)
contenu dans ISPRS Workshop Laserscanning'09, Paris, France, September 1-2, 2009 / Frédéric Bretar (2009)
Titre : Generation of a spatial information system for architecture with laserscanning data Type de document : Article/Communication Auteurs : Luigi Fregonese, Auteur ; Marco Scaioni, Auteur ; Laura Taffurelli, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2009 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 38-3/W8 Conférence : ISPRS 2009, Workshop LaserScanning 01/09/2009 02/09/2009 Paris France OA Archives proceedings Importance : pp 87 - 92 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] architecture
[Termes IGN] base de données localisées 3D
[Termes IGN] modélisation 3D
[Termes IGN] patrimoine culturel
[Termes IGN] surveillance d'ouvrage
[Termes IGN] VeniseRésumé : (Auteur) In architectural and cultural heritage documentation, laser scanning technology today offers several opportunities to approach the object to study and to extract manifold information levels from it. These account for point-clouds, 3-D models, and other data about the state of conservation. Georeferenced point-clouds can be adopted as the spatial framework of a Space Information System for Architecture, integrating all spatial information acquired by TLS, photogrammetry, geodetic surveying and direct survey, but also from other investigation techniques (e.g. GPR, thermal cameras, etc.). Such information system allows to make assessments that are important for the classification of structural elements or for the determination of the state of decay or preservation of each architectural element. With reference to the survey of two wooden domes of San Marco Basilica in Venice (Italy), the completion of the 3-D model of their complex structure is presented here through the description of its main stages, i.e. data acquisition, registration and modelling. The final 3-D model is then assumed as a 3-D database which clarifies the shape, the composition, the state of conservation and the structural function of the wooden beams of the domes. Numéro de notice : C2009-003 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVIII/3-W8/papers/87_laserscanning09.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65043
Titre : High-resolution GPS tomography in view of hydrological hazard assessment Type de document : Thèse/HDR Auteurs : Simon Lutz, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2009 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 76 Importance : 200 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-20-8 Note générale : Bibliographie
Doctoral thesisLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] aérosol
[Termes IGN] atmosphère terrestre
[Termes IGN] Bernese
[Termes IGN] campagne d'expérimentation
[Termes IGN] collocation
[Termes IGN] distribution spatiale
[Termes IGN] double différence
[Termes IGN] interpolation spatiale
[Termes IGN] météorologie
[Termes IGN] méthode des moindres carrés
[Termes IGN] modèle atmosphérique
[Termes IGN] prévision météorologique
[Termes IGN] propagation troposphérique
[Termes IGN] réfraction atmosphérique
[Termes IGN] risque naturel
[Termes IGN] temps réel
[Termes IGN] teneur en vapeur d'eau
[Termes IGN] tomographie
[Termes IGN] traitement de données GNSS
[Termes IGN] Valais (Suisse)
[Termes IGN] vapeur d'eau
[Termes IGN] voxelIndex. décimale : 30.83 Applications océanographiques de géodésie spatiale Résumé : (Auteur) In the last few years, the use of propagation delays of GNSS radio signals due to the atmospheric effect has gained considerable importance as a valuable contribution to numerical weather forecasting. GPS-based tomography is a dedicated method to resolve the temporal variation and spatial distribution of the most important constituent of the atmosphere, the tropospheric water vapor. The four-dimensional tomographic approach, however, has not yet been completely established. Investigations on the small-scale high-resolution configuration will now help to determine and model water vapor distribution and variation over local, mountainous catchment areas. Especially, the development towards near real-time analysis with a high update rate of less than one hour will reveal the potential in the field of short and medium range forecasts.
Three main objectives were defined for this research project: The first objective was the study of the feasibility of GPS tomography in a small-scale and Alpine area. Furthermore, the processing of campaign-type measurements had to be considered specifically. The second aim was the determination of the four-dimensional distribution of atmospheric water vapor over a local region using GPS tomography in view of hydrological hazard assessment. Thirdly, aspects of real-time determination had to be investigated. In this context, it had to be accounted for that, instead of precise GNSS satellite orbits, predicted ones like broadcast ephemerides or ultra-rapid orbits had to be used. Also, it had to be addressed that the processing time is a critical issue in real-time computation. As a consequence, the parameters of the complete GPS processing were refined and adapted to near real-time applications. Furthermore, new algorithms in the tomographic software were to be designed and evaluated.
The tomographic software package AWATOS (Atmospheric Water Vapor Tomography Software), developed at the Geodesy and Geodynamics Laboratory, ETH Zurich, was used for the assimilation of double-differenced GPS observations and interpolated meteorological data sets. The spatial distribution of water vapor can be determined by least-squares inversion with a high temporal resolution.
The work was carried out in five steps: Simulations helped to design an optimal GPS network for the tomographic purpose. Based on these findings, two dedicated field campaigns were performed to study the feasibility of the method for a non-permanent densification network in an Alpine region in Switzerland. Secondly, GPS derived zenith total delays (ZTD) as well as double-differenced residuals were estimated using a high performance and high accuracy post-processing software package (Bernese GPS Software Version 5.0). The results were validated by comparison with independent methods. With the software package COMEDIE, meteorological data was collocated and interpolated for the separation of the total delays into a wet and a dry part. In the third step, this set of data was processed with the GPS tomography software package AWATOS to obtain spatially and temporally highly-resolved wet refractivity fields. An automatic generation of tomographic voxel models was developed in the forth step. This tool allows high flexibility in tomographic processing and forms a fundamental part of an adaptive method of choosing voxel models at a particular spatial resolution. In the fifth step, the aspects of near real-time processing were investigated.
Measurements from a solar spectrometer and data from the current numerical weather model COSMO-7 of MeteoSwiss were available for comparison purposes. During the campaigns, radiosondes were launched to measure vertical profiles of the tropospheric meteorological components in situ and to validate the tomographic results.
The success of the tomographic method was revealed by the statistical analyses. The wet refractivity profiles from the GPS tomography software package AWATOS in the high-resolution mode match the profiles derived from corresponding radiosonde measurements within 10 ppm (refractivity units). The AWATOS profiles represent the characteristics of the different tropospheric layers in most cases with high significance.
The accuracy of GPS tomography in near real-time was assessed based on dedicated case studies with real-time orbits. The error budget of the near real-time calculations was compared to the best postprocessing solutions available. Due to large variations in the time series of the Up component of the GPS coordinate estimation, the broadcast ephemerides are not recommended for GPS meteorological applications. But ultra-rapid orbits, which are also available in real-time, yield satisfying results regarding tropospheric parameter estimation (ZTD) and the high-resolution GPS tomographic analysis.Note de contenu : 1 Introduction
1.1 Trends in GPS meteorology
1.2 Research review of atmospheric water vapor profiling
1.3 Significance of high-resolution GPS tomography
1.3.1 For the research community
1.3.2 For practical applications
1.4 Objectives
1.5 Structure
2 Theoretical background of GPS meteorology
2.1 Atmospheric water vapor
2.2 Radio wave refractivity
2.3 Refraction and path delay modeling
2.3.1 Definition
2.3.2 The Saastamoinen formula
2.3.3 Integrating tropospheric refractivity
2.3.4 Path delay interpolation with COITROPA
2.4 The Global Positioning System (GPS)
2.4.1 Introduction to GPS
2.4.2 The GPS observation equations
2.4.3 Mapping functions and standard models
2.4.4 Troposphere modeling in the Bernese GPS Software
2.5 The software package COMEDIE
2.5.1 4-D refractivity field from meteorological data
2.5.2 Estimation of tropospheric path delays
3 Ground-based GPS tomography of the neutral atmosphere
3.1 Models, methods and algorithms
3.1.1 The tomographic voxel model
3.1.2 The apriori model .
3.1.3 Inter-voxel constraints
3.1.4 Separation of the total path delay
3.2 The software package AWATOS
3.2.1 Double-difference GPS tomography
3.2.2 The tomographic equation system
3.2.3 Ray tracing and the design matrix
3.2.4 (Pscudo-) Observations and the weight matrix
3.2.5 Error budget
3.3 Network analysis tool
4 Outline of the two field campaigns
4.1 Introduction
4.2 The project area in the canton of Valais (Switzerland)
4.3 The July 2005 field campaign
4.3.1 GPS network
4.3.2 Meteorological ground measurement network
4.3.3 Radiosondes
4.4 The October 2005 field campaign
4.4.1 GPS Network
4.4.2 Meteorological ground measurement network
4.4.3 Radiosondes
4.4.4 Solar Spectrometry for comparison purpose
5 Data preprocessing
5.1 Introduction
5.2 GPS data processing
5.2.1 Overview
5.2.2 Criteria for fix station selection
5.2.3 Parameter settings in the Bernese GPS Software
5.2.4 Network solutions
5.2.5 Section summary
5.3 Meteorological data processing
5.4 Path delay comparison
6 The numerical weather model COSMO-7
6.1 Model description
6.2 Distribution of the available data
6.3 Data processing workflow
6.4 Data analysis
6.4.1 Comparison with balloon sounding profiles
6.4.2 Time series of integrated path delays
6.4.3 Comparison with time series of hourly GPS-ZTD
6.4.4 ZTD comparison with rainfall data
7 Enhancements of AWATOS
7.1 Introduction
7.2 New models and algorithms
7.2.1 Designing the voxel model
7.2.2 Obtaining a priori information
7.2.3 Allocation of meteorological data
7.2.4 Selection of beneficial stations
7.3 Further analysis tools
7.4 Notes on near real-tirnc analysis and predictive algorithms
7.5 Accuracy and reliability assessment
8 Results and discussion
8.1 Towards high spatial resolution
8.1.1 Impact of vertical spacing
8.1.2 Vertical resolution and cutoff elevation angle
8.1.3 Impact of horizontal spacing
8.1.4 Summary on the July 2005 campaign data
8.1.5 Summary on the October 2005 campaign data
8.1.6 Impact of a reduced network in October 2005
8.1.7 Discussion on spatial resolution
8.2 Correlation analysis with meteorological surface data
8.2.1 Comparison with air temperature
8.2.2 Wet refractivity variation and sunshine duration
8.2.3 Dew point temperature and atmospheric water vapor
8.3 Aspects of changing temporal resolution
8.4 Investigations in near real-time analysis
8.4.1 Processing real-time GPS orbits
8.4.2 Examination of time correlation strategies
9 ConclusionsNuméro de notice : 15512 Affiliation des auteurs : non IGN Autre URL associée : URL ETH Zurich Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-005648120 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-76.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62745 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15512-01 30.83 Livre Centre de documentation Géodésie Disponible A multi-directional ground filtering algorithm for airborne LIDAR / X. Meng in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 1 (January - February 2009)
[article]
Titre : A multi-directional ground filtering algorithm for airborne LIDAR Type de document : Article/Communication Auteurs : X. Meng, Auteur ; L. Wang, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 117 - 124 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] algorithme de filtrage
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] Kappa de Cohen
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] modèle numérique de terrain
[Termes IGN] signal laserRésumé : (Auteur) Automatic ground filtering for Light Detection And Ranging (LIDAR) data is a critical process for Digital Terrain Model (DTM) and three-dimensional urban model generation. Although researchers have developed many methods to separate bare ground from other urban features, the problem has not been fully solved due to the similar characteristics possessed by ground and non-ground objects, especially on abrupt surfaces. Current methods can be grouped into two major categories: neighborhood-based approaches and directional filtering. In this study, following the direction of the second branch, we propose a new Multi-directional Ground Filtering (MGF) algorithm to incorporate a two-dimensional neighborhood in the directional scanning so as to prevent the errors introduced by the sensitivity to directions. Besides this, the MGF algorithm explores the utility of identifying pattern varieties in different directions across an image. The authors conducted a comprehensive test of the performance on fifteen study sites and compared our results to eight other publicized methods based on the Kappa coefficients calculated from the error matrices reported by ISPRS. Overall, the MGF filter produces a promising performance in both urban and forest areas. The size and shape of non-ground objects do not pose significant influence on the performance of the MGF algorithm. The fact that MGF algorithm is robust to two commonly required parameters, slope and elevation difference thresholds, has added practical merits to be adopted in different landscapes. Copyright ISPRS Numéro de notice : A2009-031 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2008.09.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2008.09.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29661
in ISPRS Journal of photogrammetry and remote sensing > vol 64 n° 1 (January - February 2009) . - pp 117 - 124[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-09011 SL Revue Centre de documentation Revues en salle Disponible Not going with the proverbal flow / A. Riley in GEO: Geoconnexion international, vol 8 n° 1 (january 2009)
[article]
Titre : Not going with the proverbal flow Type de document : Article/Communication Auteurs : A. Riley, Auteur Année de publication : 2009 Article en page(s) : pp 19 - 21 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] cours d'eau
[Termes IGN] données lidar
[Termes IGN] marais
[Termes IGN] modèle numérique de terrain
[Termes IGN] modélisation 3D
[Termes IGN] niveau de l'eau
[Termes IGN] zone humideRésumé : (Auteur) How an active nonprofit organization is utilizing Lidar to restore neglected streams and wetlands. Copyright Geo:Geoconnexion Numéro de notice : A2009-088 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29718
in GEO: Geoconnexion international > vol 8 n° 1 (january 2009) . - pp 19 - 21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 062-09011 RAB Revue Centre de documentation En réserve L003 Disponible La photomodélisation architecturale / Livio de Luca (2009)
Titre : La photomodélisation architecturale : relevé, modélisation, représentation d'édifices à partir de photographies Type de document : Guide/Manuel Auteurs : Livio de Luca, Auteur Editeur : Paris : Eyrolles Année de publication : 2009 Importance : 263 p. Format : 17 x 23 cm ISBN/ISSN/EAN : 978-2-212-12524-5 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre
[Termes IGN] bâtiment
[Termes IGN] étalonnage d'instrument
[Termes IGN] image panoramique
[Termes IGN] modélisation 3D
[Termes IGN] orientation du capteur
[Termes IGN] photogrammétrie architecturale
[Termes IGN] prise de vue terrestre
[Termes IGN] reconstruction 3D du bâtiIndex. décimale : 33.70 Photogrammétrie terrestre Résumé : (Editeur) De nombreux pays s'intéressent à la numérisation 3D de leur patrimoine architectural, ce qui permettrait aux institutions concernées (monuments historiques, musées, sites archéologiques, etc.) de l'archiver et de le valoriser Répondant à ces besoins, la photomodélisation est une technique capable de reconstruire en trois dimensions des scènes réelles à partir de photographies ; appliquée à l'architecture, elle constitue une solution adaptée pour documenter l'état actuel des bâtiments historiques, fournir des ressources aux chercheurs, et élaborer des supports de diffusion auprès du grand public. Traitant aussi bien des aspects théoriques et méthodologiques que des applications pratiques, cet ouvrage très richement illustré explique comment concevoir des représentations 2D et 3D d'édifices à partir de simples images. Il est complété par trois études de cas (villa Savoye de Le Corbusier, hôtel de Béthune-Sully, chapelle des fresques de la chartreuse de Villeneuve-lez-Avignon), qui font appel aux logiciels ImageModeler, Stitcher et AutoCAD d'Autodesk, et par un portail web comprenant images, vidéos, tutoriels et maquettes 3D temps réel. Cet ouvrage s'adresse aussi bien aux professionnels du domaine de la conservation et de la valorisation du patrimoine (architectes, conservateurs, géomètres, archéologues...) qu'aux étudiants en architecture, ingénierie ou histoire. Note de contenu : PARTIE 1 - Théorie et méthodologie
Chapitre 1 : Introduction à la photomodélisation architecturale
Chapitre 2 : La prise de vue photographique
Chapitre 3 : Calibration et orientation des caméras
Chapitre 4 : Prise de mesures et restitution bidimensionnelle
Chapitre 5 : La reconstruction géométrique 3D
Chapitre 6 : La représentation basée sur l'image
Chapitre 7 : Autres applications
PARTIE 2 - Trois cas d'étude
Cas d'étude n° 1 - Mesures et dessin d'une façade
Cas d'étude n° 2 - Modélisation 3D d'un édifice "tel que construit"
Cas d'étude n° 3 - Reconstruction photoréaliste d'un intérieur
ANNEXES
Bibliographie
Index des édifices figurant dans l'ouvrageNuméro de notice : 20671 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Manuel Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63115 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20671-01 33.70 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible Pioneers in 3D GIS solutions / L. Mckinley in GIM international, vol 23 n° 1 (January 2009)PermalinkThe role of Lidar systems in fuel mapping / António Ferraz (2009)PermalinkPermalinkExtending marine GIS capabilities: 3D representation of fish aggregations using Delaunay tetrahedralisation and Alpha shapes / V. Carette in Geomatica, vol 62 n° 4 (December 2008)PermalinkLaser 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)PermalinkUsing a binary space partitioning tree for reconstructing polyhedral building models from airborne Lidar data / Gunho Sohn in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 11 (November 2008)PermalinkClose range photogrammetry experiments for 3D modelling of archaeological excavation site / S. Daniel in Geomatica, vol 62 n° 3 (September 2008)PermalinkCoastal surveying techniques / C. Pennington in Geoinformatics, vol 11 n° 6 (01/09/2008)PermalinkDetection, characterization, and modeling vegetation in urban areas from high-resolution aerial imagery / Corina Iovan in IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol 1 n° 3 (2008)PermalinkTerrestrial laser scan survey and 3D TIN model construction of urban buildings in a geospatial database / T. Tang in Geocarto international, vol 23 n° 4 (August - September 2008)Permalink