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Gigapixel frame images: is the holy grail of airborne digital frame imaging in sight? (Part 1) / Gordon Petrie in Geoinformatics, vol 9 n° 1 (01/01/2006)
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Titre : Gigapixel frame images: is the holy grail of airborne digital frame imaging in sight? (Part 1) Type de document : Article/Communication Auteurs : Gordon Petrie, Auteur Année de publication : 2006 Article en page(s) : pp 20 - 25 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] chambre à grand format
[Termes IGN] chambre DTC
[Termes IGN] image gigapixel
[Termes IGN] image numérique
[Termes IGN] instrumentation Kodak
[Termes IGN] prise de vue aérienne
[Termes IGN] prise de vue terrestreRésumé : (Auteur) Over the last few years, there has been much interest in and considerable publicity about the production of digital frame images that are Gigapixels in size. This interest has been apparent both among amateur and professional photographers at one end of the imaging community and among scientific astronomers at the other end. This article reviews the technical developments that have taken place to allow Gigapixel images to be generated. It also discusses the possible implications for the geoinformatics industry, especially those involved in airborne photogrammetric and remote sensing activities. Numéro de notice : A2006-048 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27775
in Geoinformatics > vol 9 n° 1 (01/01/2006) . - pp 20 - 25[article]Voir aussiRéservation
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Code-barres Cote Support Localisation Section Disponibilité 262-06011 SL Revue Centre de documentation Revues en salle Disponible ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, 2. Tome 2 / Alain Baudoin (2006)
Titre de série : ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, 2 Titre : Tome 2 Type de document : Actes de congrès Auteurs : Alain Baudoin , Éditeur scientifique ; Nicolas Paparoditis , Éditeur scientifique Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2006 Autre Editeur : Champs/Marne [France] : Société française de photogrammétrie et de télédétection SFPT Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 36 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Importance : 255 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] caméra numérique
[Termes IGN] capteur aérien
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] géométrie de l'image
[Termes IGN] Lidar
[Termes IGN] minisatellite
[Termes IGN] modèle numérique de surface
[Termes IGN] navigation automobile
[Termes IGN] radar à antenne synthétique
[Termes IGN] système de numérisation mobileNote de contenu : Part B
WG 1/1 Standards, calibration and validation
Absolute spectroradiometric calibration of the ADS40 sensor / Beisl U
The geometric supersite of Salon de Provence / Gachet R, Fave P, Delvit JM
Geometric calibration of Pleiades location model / Greslou D, De Lussy F
Radiometric normalization of a SPOT 4 and SPOT 5 time series of images (ISLE-REUNION) for agriculture applications / Begue A, El Hajj M, Houles V
Permanent validation of the geometric calibration as complement to MISR data production system / Nelson D, Jovanovic V
On-Orbit Modulation Transfer Function Estimation for BiLSAT Imagers / Leloglu UM, Tunali E
Jason-1 and Topex/Poseidon Altimeter Calibration Campaigns in the Western Mediterranean / Ta/aya J, Bonnefond P, Martinez-Benjamin M, Martinez-Garcia M, Martin-Davila J, Ortiz MA, Baron A
WG 1/2 SAR and LIDAR Systems
Matching Topographic Surfaces: Application to Lidar Data and Photogrammetric Surfaces / Bretar F, Roux M, Pierrot-Deseilligny M
First Data Acquisition and Processing Concepts for the TanDEM-X Mission / Krieger G, Roth A, Eineder M
Evaluation of the potential of SAR ERS and ASAR Envisat sensors in multi-incidence and multi-polarization modes for landscape study in French Guyana: Example of Kourou and Saint Laurent du Maroni / Rudant JP, Mascret A, Prison PL, Kouame JL
Extreme Precision LiDAR Mapping / Toth CK, Grejner-Brzezinska D, Bevis M
Performance Analysis of ALTM 3100EA: Instrument Specifications and Accuracy of Lidar Data / Ussyshkin V, Smith B
WG 1/3 Multi-Platform Sensing and Sensor Networks
Spatial Sensor Web Reference Model / Liang SHL, TaoV
On the Use of SAR and Optical Images Combination for scene interpretation / Oiler G, Adragna F, Petit D
WG 1/4 Airborne Digital Photogrammetric Sensors Systems
Bundle block adjustment with UltraCamO images / Biiyiiksalih G, Jacobsen K
Calibration and validation of digital airborne cameras / Cramer M
A comparative study of three methods for identifying individual tree crowns in aerial images covering different types of forests / Perrin G, Descombes X, Eriksson M, Zerubia J
The HRSC-AX Mt. Etna Project. High-Resolution Orthoimages and 1 m DEM at Regional Scale / Matz KD, Marsella M, Gwinner K, Coltelli M, Flohrer J, Jaumann R, Roatsch T, Scholten F, Trauthan F
Tests and performance evaluation of DMC images and new methods for their processing / Kocaman S, Zhang L, Akca D, Komus W, Baltsavias E
Radiometric evaluation of digital aeraial cameras / Peltoniemi J, Ahokas E, Markelin L, Honkavaara E, Suomalainen J
Geometric validation of imagery and products from a high performance airborne digital sensor / Mills JP, Morgan J, AI-Hamlan S, Abuoliat AS
Investigation of digital colour images / Grohmann D, Ziemann H
"Atmospheric" correction of digital colour images based on luminance ratio consideration / Ziemann H, Grohmann D
WG 1/5 Geometric Modelling of Optical Spaceborne Sensors and DEM Generation
Geometric modelling and Orthorectification of SPOTS Super Mode images / Boukerch I, Bounour H
First assessments of Pleiades system potential for IGN-France image acquisition requirements / Cantou JP, Buissart H
The Pleiades-HR mosaic system product / De Lossy F, Airault S, Gigord P
In-depth investigations of parameters influencing accuracy of orthoimages from high resolution satellites / Baltsavias E, Zhang L , Eisenbeiss H
Evaluation of the potential of Pleiades system for 3D city models production: building, vegetation and DTM extraction / Flamanc D, Durupt M, Le Bris A, lovan C, Champion N
Comparison of DEM Generation and Combination Methods Using High Resolution Optical Stereo Imagery and Interferometric SAR Data / Reinartz P, Schroeder M, Hoja D
Accuracy comparison tests on Ortho-rectified High Resolution Satellite Images / loannidis C, Katsigiannis A
Comparison of DSM generation methods of urban areas from IKONOS images / Reinartz P, Lehner M, Krauss T
In-flight Calibration of SPOT-5 and Formosat-2 / Toutin T, Blondel E, Mietke S, Rother K
3D physical versus empirical models for HR sensor orientation and elevation extraction: examples with Ikonos and QuickBird / Toutin T, Schauer P
WG 1/6 Small Satellites
Thailand Earth observation system: Mission and Products / Choomnoommanee T, Fraisse R, Kaewmanee M
Deep Processing for Beijing-1 Small Satellite / Yang XM, Lan RQ, Yang S
WG 1/7 Intelligent Earth Sensing
Automated sensor block adjustment and local satellite positionning: Benefits, and perspectives for mapping applications / Le Guellec A
From Global Earth Observation System of Systems (GEOSS) to Intelligent Earth Observing Satellite System (FIEOSS) for it social benefit / Zhou G
ICWG I-V Autonomous Vehicle Navigation
Autonomous Image Based Localisation for a Martian Aerobot / Paar G, Summers P, Bames D, Shaw A, Woods M, Ward R, Evans M, Sims M
Applications of photogrammetric processing using an autonomous model helicopter / Eisenbeiss H
Mobile Mapping and Autonomous Vehicle Navigation / Toth CK, Paska E
Project for an autonomous model helicopter navigation system / Guamieri A, Vettore A, Pirotti F
IC WG V-l Integrated Systems for Mobile Mapping
The potential of low-end IMUs for mobile mapping systems / Barsi A, Lovas T, Kertész I
Application of Mobile GIS and SOI for Emergency Management / Malek M, Mohammadi H, Mobaraki A, Mansourian ANuméro de notice : 13407B Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Actes En ligne : https://www.isprs.org/proceedings/XXXVI/part1/default.aspx Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34639 Voir aussiContient
- Matching topographic surfaces : application to lidar and photogrammetric surfaces / Frédéric Bretar in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
- Evaluation of the potential of SAR ERS and ASAR Envisat sensors in multi-incidence and multi-polarisation modes for landscape study in French Guyana: examples of Kourou and Saint Laurent du Maroni / J.L. Kouame in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
- First assessments of Pleiades system potential for IGN-France image acquisition requirements / Jean-Philippe Cantou in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
- Evaluation of the potential of Pleiades system for 3D city models production: building, vegetation and extraction / Mélanie Durupt in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
- The Pleiades-HR mosaic system product / Françoise de Lussy in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
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Code-barres Cote Support Localisation Section Disponibilité 13407-01B CG2006 Livre Centre de documentation Congrès Disponible ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, vol 1. Proceedings / Alain Baudoin (2006)
Titre de série : ISPRS Commission 1 Symposium 2006, Paris, Marne-la-Vallée, 3-6 Juillet 2006: Des capteurs à l'imagerie, vol 1 Titre : Proceedings Type de document : Actes de congrès Auteurs : Alain Baudoin , Éditeur scientifique ; Nicolas Paparoditis , Éditeur scientifique ; Société française de photogrammétrie et de télédétection, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2006 Autre Editeur : Champs/Marne [France] : Société française de photogrammétrie et de télédétection SFPT Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 36-B1 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Importance : 174 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] caméra numérique
[Termes IGN] capteur aérien
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] géométrie de l'image
[Termes IGN] Lidar
[Termes IGN] minisatellite
[Termes IGN] modèle numérique de surface
[Termes IGN] navigation automobile
[Termes IGN] radar à antenne synthétique
[Termes IGN] semis de points
[Termes IGN] système de numérisation mobileNote de contenu : Part A
WG 1/1 Standards, calibration and validation
Requirements for an Orientation and Calibration Standard for digital aerial Cameras and related sensors / Kresse W, Skaloud J, Hinsken L
Activities of Calibration and Validation for the KOMPSAT-2 MSC data / Park SY, LJm HS, Lee DH, Seo DC
WG I/2 SAR and LIDAR Systems
A three dimensional dominant scatterer map extends the DEM information in urban areas / Adam N, Eineder M
Calibration of the Optech ALTM 3100 laser scanner intensity data using brightness targets / Suomalainen J, Kaasalainen S, Ahokas E, Hyyppa J
Caracteristics of the measurement unit of a full-waveform laser system / Jutzi B, Stilla U
Classification of fully polarimetric Sar data for land use cartography / Prison PL, Tison C, Lardeux C, Rudant JP, Souyris JC, Stoll B
Assessment and comparison of registration algorithms between aerial images and laser point clouds / Kotsis I, Georgopoulos A , Karamitsos S, Pothou A
A review of the ASPRS guidelines for the reporting of horizontal and vertical accuracies in Lidar data / Theiss H, Johanesen T, Rodarmel C, Samberg A
WG 1/3 Multi-Platform Sensing and Sensor Networks
Co-registration and inter-sensor comparison of MODIS and Landsat 7 ETM+ data aimed at NDVI calculation / Claps P, Boccardo P, Borgogno Mondino E, Perez F
WG 1/4 Airborne Digital Photogrammetric Sensors Systems
Image Restoration for Resolution Improvement of Digital Aerial Images: A comparison of large format digital cameras / Markelin L, Becker S, Haala N, Honkavaara E
Theoretical and empirical evaluation of geometric performance of multi-head large format photogrammetric sensors / Nurminen K, Jaakkola J, Markelin L, Honkavaara E, Ahokas E
Evaluation of resolving power and IVITF of DMC / Markelin L, Honkavaara E, Jaakkola J, Becker S
Evaluation of digital aerial sensors in an operational mapping environment / Olsen BP, Frederiksen P, Me/sen M, Knudsen T, KellerK, Jorgensen LT
Is there an ideal digital aerial camera ? / Souchon JP, Paparoditis N, Martin O, Meynard C, Thorn C
Seamless Automatic Mosaicking taking into account Infrastructures and Buildings / Xandri R, Pa/a V, Arbiol R, Perez F
WG 1/5 Geometric Modelling of Optical Spaceborne Sensors and DEM Generation
Geometric accuracy of Ikonos GEO panchromatic orthoimage products / Aguilar MA, Aguilar FJ, Aguera F, Carvajal F, Estrada L
An integrated model to estimate the accuracy of digital orthoimages from high resolution satellite imagery / Aguilar FJ, Aguilar MA , Carvajal F, Aguera F
Generation and validation of digital elevation models based on satellite images / Buyuksalih G, Jacobsen K
Analysis of rigorous orientation models for pushbroom sensors, applications with Quickbird / Crespi M, Giannone F, Poll D
Analysis of artifacts in sub-pixel remote sensing image registration / Inglada J, Muron V, Pichard D, Feuvrier T
Accuracy investigation on large blocks of high resolution images / Passini RM, Jacobsen K
Pros and cons of the orientation of very high resolution optical space images / Jacobsen K
Automatic 3D building reconstruction from DEMs : an application to PLEIADES simulations / Lafarge F, Zerubia J, Pierrot-Deseilligny M, Descombes X
An improved model for along track stereo sensors using rigorous orbit mechanics and navigation data / Michalis P, Dowman I
WG 1/6 Small Satellites
International Study on Cost-Effective Earth Observation Missions - Outcomes and Visions / Sandau R
WG 1/7 Intelligent Earth Sensing
Space analysis and the detection of the changes for the follow-up of the components sand-vegetation in the area of Mecheria, Algeria / Haddouch I, Mederbal K, Saidi S
IC WG V-l Integrated Systems for Mobile Mapping
Bridging Land-based Mobile Mapping Using Photogrammetric Adjustments / Ellun C, El-Sheimy N, Hassan T
Open-Source Software-Operated CMOS Camera for Real-Time Mapping / JanvierN, Skaloud J, Gontran H
An Integrated On-Board Laser Range Sensing System for On-the-Way City and Road Modelling / Goulette F, Nashashibi F, Ammoun S, Abuhadrous I, Laurgeau C
Towards a sub-decimetric georeferencing of ground-based mobile mapping systems in urban areas: matching ground-based and aerial-based imagery using roadmarks / Soheilian B, Toumaire O, Paparoditis NNuméro de notice : 13407A Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Actes DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34638 Voir aussiContient
- Automatic 3D building reconstruction from DEMs: an application to Pleiades simulations / Florent Lafarge in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
- Is there an ideal digital aerial camera? / Jean-Philippe Souchon in Revue Française de Photogrammétrie et de Télédétection, n° 183 (Septembre 2006)
- Towards a sub-decimetric georeferencing of ground-based mobile mapping systems in urban areas: matching ground-based and aerial-based imagery using roadmarks / Olivier Tournaire in Revue Française de Photogrammétrie et de Télédétection, n° 185 (Mars 2007)
- Classification of fully polarimetric SAR data for land use cartography / Cédric Lardeux in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
- Automatic 3D building reconstruction from DEMs: an application to Pleiades simulations / Florent Lafarge in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
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Code-barres Cote Support Localisation Section Disponibilité 13407-01A CG2006 Livre Centre de documentation Congrès Disponible 13407-01 DEP-RECP Cédérom LASTIG Dépôt en unité Exclu du prêt
Titre : The Swiss trolley : a modular system for track surveying Type de document : Rapport Auteurs : Ralph Glaus, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2006 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 70 Importance : 184 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-13-0 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] capteur imageur
[Termes IGN] capteur non-imageur
[Termes IGN] données localisées
[Termes IGN] filtre de Kalman
[Termes IGN] fonction spline
[Termes IGN] fusion de données
[Termes IGN] GPS en mode cinématique
[Termes IGN] GPS en mode différentiel
[Termes IGN] GPS-INS
[Termes IGN] lissage de données
[Termes IGN] navigation à l'estime
[Termes IGN] odomètre
[Termes IGN] positionnement absolu
[Termes IGN] précision millimétrique
[Termes IGN] prise de vue terrestre
[Termes IGN] réseau ferroviaire
[Termes IGN] surveillance d'ouvrage
[Termes IGN] tachéomètre électronique
[Termes IGN] transport ferroviaireIndex. décimale : 30.70 Navigation et positionnement Résumé : (Auteur) Modern railway infrastructure requires accurate, absolute referenced spatial data for project planning, construction and maintenance. On the one hand, passenger safety and travel comfort depend to a large extent on accurate tracks. On the other hand, absolute referenced coordinates of railway assets facilitate data exchange between railway operators and third parties. In addition, time slots for maintenance are short, due to the high volumes of traffic on major railway lines. Thus, flexible surveying systems are required yielding accurate data within a short time. The multi-sensor platform Swiss Trolley, which offers such a flexible system, copes with absolute referenced spatial data. The platform is mounted on a track vehicle. This allows for a complete description of the track environment in kinematic mode with a minimum of interference time with regular traffic.
The Swiss Trolley features a modular design. A basic module for assessing track key parameters such as chainage, cant, twist, gradients and track gauge covers monitoring tasks on construction sites. A positioning module integrating GPS or total stations allows for the determination of the track axis. A further scan module can be used to generate absolute referenced point clouds in the track environment.
This work compiles the development steps of the Swiss Trolley. Relevant side conditions re-garding track surveying, coming from track geometry and the railway operators are summarised and state-of-the-art systems are reviewed. Based on these premises, a niche for Swiss Trolley applications is defined. Sensors providing geometric data in the track environment are evaluated in regard to their suitability and error behaviour.
The key problem of the trolley positioning consists in determining the six degrees of freedom of the multi-sensor platform at any point in time. The chosen kinematic approach asks for a careful treatment of time constraints. Each data string coming from a specific sensor must own an accurate time tag. Kinematic surveys at walking speed with subcentimetric accuracy require time tags with millisecond accuracy.
The incorporated sensors were investigated regarding their error behaviour. Calibration issues are addressed and approaches for the bias determination are presented. Models for correcting collimation errors and nuisance accelearations are given for the pendulum inclination sensors used. Moreover, emphasis was placed on biases emerging at kinematic surveys for the particular optical total station used. Reduction models for the laser scanner data are proposed and calibration procedures providing intrinsic orientation and latency parameters are given.
A kinematic model for Swiss Trolley surveys based on the Frenet base system and its canonical representation was developed. Explicit formulae are given for runs on geometric elements dominating in the railway track environment. For the mutual data processing, a loosely coupled filter concept is proposed consisting of data pre-processing, synchronisation and filtering steps. The core of data processing is a Kalman filter, estimating vehicle and track states in an absolute or a relative reference frame. By means of the filter approach, the observations of the involved sensors can be integrated in a spatial model. Individual filter runs can be assembled by an additional merge step. Merged runs in up and down direction allow for a quality assessment and also allow for the monitoring of eventually remaining biases such as a boresight misalignment or inclination sensor zero point offsets.
Positioning accuracies for the static and kinematic case were assessed on the one hand by the comparison of up and down runs. On the other hand, comparisons were carried out with independently measured reference data. The static error behaviour of the Swiss Trolley could be evaluated by using a slab track alignment. Submillimetric positioning accuracies were obtained in combination with high-precision total stations. Kinematic positioning accuracy mainly depends on the positioning sensor used. Optical total stations providing synchronised angle and distance data allow for subcentimetric positioning. High-precision DGPS position-ing yields subcentimetric accuracy for the horizontal component. The typical vertical accuracy is better than two centimetres. The integrated longitudinally mounted inclination sensor slightly augments the mere GPS solution. The attitude determination of the platform is a result of the combined data treatment. For GPS surveys, the typical pitch angle accuracy is two mrad. Yaw angles essentially correspond to the derivation of the trajectory with respect to the covered path and are determined with one mrad accuracy. Roll angle accuracy is dominated by the inclination sensor measurements across the track. The typical accuracy is 0.3 mrad. For the scan module, laser dots in the absolute reference frame are degraded by the uncertainty of the trajectory and the platform attitude amplified by a geometry-depending lever. The absolute accuracy of such a dot is three centimetres using a time-of-flight laser scanner. Relative accuracy between two adjacent dots amounts to five millimetres.
The Swiss Trolley was successfully applied on numerous assignments. Adaptations for the multi-sensor platform exist for tunnel site locomotives and road-vehicles.Note de contenu : 1 Introduction
2 Track Geometry
2.1 Nominal Geometries
2.1.1 Introduction
2.1.2 Horizontal Layout
2.1.3 Vertical Layout
2.2 Rules and Standards of Different Countries
2.2.1 Horizontal Layout
2.2.2 Vertical Layout
2.2.3 Cant
2.3 Kinematic Model of Motion
2.3.1 Kinematics in the Frenet System
2.3.2 Canonical Representation of the Most Common Track Curves
2.4 Remarks on Track Accuracy
2.4.1 General Remarks
2.4.2 Relative and Absolute Accuracy of a Track
2.5 Methods for Track Surveying
2.5.1 Overview
2.5.2 Relative Track Surveying
2.5.3 Absolute Track Surveying
2.5.4 Selected Track-Surveying Systems
2.5.5 The Swiss Trolley - Finding the Niche
3 Potentials and Limitations of a Kinematic Track-Surveying System
3.1 Kinematic Surveying
3.2 Absolute Position Fixing
3.2.1 GNSS
3.2.2 Tracking Total Stations
3.3 Dead Reckoning
3.3.1 Inertial Navigation Systems (INS)
3.3.2 Yaw Rates by Chord Techniques
3.3.3 Odometers
3.3.4 Height Determination by an Inclination Sensor
3.4 Attitude Determination
3.5 Kinematic Surveys of the Railway Inventory
3.5.1 Track Gauge Measuring Systems
3.5.2 Laser Scanners
3.5.3 3D Cameras
3.5.4 Ground Penetration Radar (GPR)
3.6 Synchronisation
3.7 Modelling
3.8 Transformation
4 The Track-Surveying Trolley
4.1 Introduction
4.1.1 Development
4.1.2 Concept
4.2 Data Acquisition
4.2.1 Electronic Box
4.2.2 A/D Conversion
4.2.3 Data Synchronisation
4.3 Reconstruction
4.4 Inclination Sensors
4.4.1 Sensor Characteristics
4.4.2 Calibration of Characteristic Curve
4.4.3 Temperature Influences
4.4.4 Corrections for Non-Orthogonalities (Collimation Error)
4.4.5 Dynamic Behaviour of the Inclination Sensor
4.4.6 Transformation of the Inclination Angles into the Body-System
4.5 Track Gauge Measuring System
4.5.1 Characteristics and Measuring Principle of the Track Gauge Measuring System
4.5.2 Calibration
4.6 Odometers
4.6.1 Characteristics and Calibration
4.7 Integration of Tracking Total Stations
4.7.1 Characteristics
4.7.2 Common Total Station Biases
4.7.3 Deflections of the Vertical
4.7.4 Surveys in Canted Sections
4.7.5 Synchronisation of Distances and Angles
4.7.6 Internal Tacheometer and Radio Latencies
4.8 Integration of GPS
4.8.1 Characteristics
4.8.2 NMEA Data
4.9 Boresight Calibration of Prism and Antenna Phase Centre
4.10 Laser Scanners
4.10.1 Characteristics
4.10.2 Model
4.10.3 Yaw Angle Correction
4.10.4 Evaluation of the Laser Scanner Precision
4.10.5 Variance Propagation for a Given Scanner Arrangement
4.10.6 Kinematic Calibration of Rmb, xmb and the Latency
5 Data Processing
5.1 Introduction
5.2 Post-Processing Software Concept
5.3 Data Preprocessing
5.3.1 Blunder Labelling
5.3.2 Reduction, Model
5.3.3 Linear Filters
5.3.4 Synchronisation
5.3.5 Reduction to the Centre Line of the Track
5.4 Trajectory Smoothing by a Kalman Filter
5.4.1 Discrete Kalman Filter
5.4.2 Backward Filter and Smoother
5.4.3 Absolute Model
5.4.4 Relative Model
5.5 Smoothing Splines
5.5.1 Smoothing Splines with First Derivatives
5.5.2 Comparison between Kalman Filter and Smoothing Splines
5.6 Merging Trajectories
5.6.1 Strategies for Merging
5.6.2 Chaining the Pieces
5.6.3 Merging
5.6.4 Linking Scans to Merged Trajectories
6 Applications
6.1 Slab Track Alignment
6.2 Kinematic Track Axis Surveys
6.2.1 Comparison between Forward Filter, Backward Filter and Smoother
6.2.2 Filter Tuning
6.2.3 Comparison between Absolute and Relative Model
6.2.4 The Influence of Inclinometer Measurement on GPS Heights
6.2.5 The Smoother in Action - GPS Example
6.2.6 The Smoother in Action - Total Station Example
6.3 Kinematic Scanning
7 ConclusionsNuméro de notice : 15261 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport de recherche En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-70.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55115 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15261-01 30.70 Livre Centre de documentation Géodésie Disponible 15261-02 30.70 Livre Centre de documentation Géodésie Disponible A digital camera as a tool to measure colour indices and related properties of sandy soils in semi-arid environments / N. Levin in International Journal of Remote Sensing IJRS, vol 26 n° 24 (December 2005)
[article]
Titre : A digital camera as a tool to measure colour indices and related properties of sandy soils in semi-arid environments Type de document : Article/Communication Auteurs : N. Levin, Auteur ; Eyal Ben-Dor, Auteur ; A. Singer, Auteur Année de publication : 2005 Article en page(s) : pp 5475 - 5492 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse comparative
[Termes IGN] caméra numérique
[Termes IGN] composition chimique
[Termes IGN] couleur du sol
[Termes IGN] étalonnage des données
[Termes IGN] fer
[Termes IGN] image RVB
[Termes IGN] particule
[Termes IGN] sable
[Termes IGN] spectromètre
[Termes IGN] zone semi-arideRésumé : (Auteur) Soil colour carries important information regarding the soil's chemical and physical properties. However, common practices for measuring soil colour, either by Munsell charts or by field/laboratory spectrometers, are insufficient, due to the subjective and nonquantitative character of the Munsell charts, and to the high cost and inconvenience of field spectrometers. We present herein, a method to characterize the colour of soil samples, and related chemical and physical properties of the soil, using a digital camera, and an array of coloured plastic chips, that are used for calibration purposes. Using 370 samples of sandy soils, we have demonstrated that both RGB values from digital images and their derived soil indices, correlate highly with similar measurements performed by a field spectrometer. When checked against free iron oxide content and against the percentage of fine particles in a subsample set of 42 soils, the redness index as measured by the digital camera gave similar or better correlations than those obtained from a field spectrometer, against both free iron oxides and fine particle contents (R2 of 89% for the iron oxides, and of for the fine particles). We propose the use of a digital camera as a field analytical tool to determine precisely: soil colour, iron oxide and fine particle content. Further study in this direction, with other soil population and more soil properties, is strongly advised in order to launch this as a vastly applicable and generic method. Numéro de notice : A2005-522 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500099444 En ligne : https://doi.org/10.1080/01431160500099444 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27658
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