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vol 23 n° 123 - September - November 2008 - ISPRS Hannover workshop, 29 May - 1st June 2007 [on] high-resolution Earth imagery for geospatial information, [actes]. Part 1 (Bulletin de Photogrammetric record) / Remote sensing and photogrammetry society

Public [n° ou bulletin]  est un bulletin de Photogrammetric record / Remote sensing and photogrammetry society (1953 - )   Titre : vol 23 n° 123 - September - November 2008 - ISPRS Hannover workshop, 29 May - 1st June 2007 [on] high-resolution Earth imagery for geospatial information, [actes]. Part 1 Type de document : Périodique Auteurs : Remote sensing and photogrammetry society, Auteur Congrès : ISPRS 2007, High-Resolution Earth Imaging for Geospatial Information workshop (29 mai - 1er juin 2007; Hanovre, Allemagne), Auteur Année de publication : 2008 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale [Termes descripteurs IGN] image à haute résolution [Termes descripteurs IGN] image ALOS [Termes descripteurs IGN] image Cartosat-1 [Termes descripteurs IGN] orientation du capteur Numéro de notice : 106-0803 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=21595 [n° ou bulletin]

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• Development and testing of a generic sensor model for pushbroom satellite imagery / T. Weser in Photogrammetric record, vol 23 n° 123 (September - November 2008)
• Potential accuracy of image orientation of small satellites: a case study of CHRIS/Proba data / Ahmed Shaker in Photogrammetric record, vol 23 n° 123 (September - November 2008)
• Advanced studies in strip pair processing of Cartosat-1 data / P.K. Srivastava in Photogrammetric record, vol 23 n° 123 (September - November 2008)
• Analysis of Cartosat-1 images regarding image quality, 3D point measurement and DSM generation / Emmanuel Baltsavias in Photogrammetric record, vol 23 n° 123 (September - November 2008)
• Orientation and self-calibration of ALOS PRISM imagery / S. Kocaman in Photogrammetric record, vol 23 n° 123 (September - November 2008)

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Modeling the potential swath coverage of nadir and off-nadir pointable remote sensing satellite-sensor systems / S. Hodgson in Cartography and Geographic Information Science, vol 35 n° 3 (July 2008)

Public [article]  inCartography and Geographic Information Science > vol 35 n° 3 (July 2008) . - pp 147 - 156 Titre : Modeling the potential swath coverage of nadir and off-nadir pointable remote sensing satellite-sensor systems Type de document : Article/Communication Auteurs : S. Hodgson, Auteur ; B. Kar, Auteur Année de publication : 2008 Article en page(s) : pp 147 - 156 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes descripteurs IGN] fauchée [Termes descripteurs IGN] projection azimutale Résumé : (Auteur) Pointable sensor systems onboard many earth resources satellites today, particularly the higher spatial resolution sensors, provide for a near infinite set of collection opportunities. Satellite orbits of these systems are not systematic repetitive tracks. Predicting future collection opportunities requires predicting where the satellite will be and then computing the potential swath coverage from a pointable sensor along these orbits. While each agency or company models its own satellite-sensor systems, few publicly available sources exist for mapping future satellite ground tracks. Evaluating collection opportunities from multiple satellite-sensor systems from different agencies/companies is problematic. The purpose of the research described in this article was to develop a generic approach for modeling future satellite-sensor collection opportunities. In this article, formulae are developed for computing the potential swath coverage, and an algorithm is designed for constructing the potential swath coverage area. The solution to the swath coverage problem is based on spherical trigonometry, a well known map projection (i.e., azimuthal equidistant map projection) used in an unconventional dynamic form, and a satellite orbital propagation model. We demonstrate how the computation of the swath coverage area can be accomplished using a temporal series of re-centered map projections. Copyright CaGISociety Numéro de notice : A2008-289 Thématique : IMAGERIE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29282 [article]

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Effect of data density, scan angle, and flying height on the accuracy of building extraction using LiDAR data / Bharat Lohani in Geocarto international, vol 23 n° 2 (April - May 2008)

Public [article]  inGeocarto international > vol 23 n° 2 (April - May 2008) . - pp 81 - 94 Titre : Effect of data density, scan angle, and flying height on the accuracy of building extraction using LiDAR data Type de document : Article/Communication Auteurs : Bharat Lohani, Auteur ; R. Singh, Auteur Année de publication : 2008 Article en page(s) : pp 81 - 94 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes descripteurs IGN] angle de visée [Termes descripteurs IGN] densité des points [Termes descripteurs IGN] détection du bâti [Termes descripteurs IGN] données lidar [Termes descripteurs IGN] hauteur de vol [Termes descripteurs IGN] simulation 3D [Termes descripteurs IGN] transformation de Hough Résumé : (Auteur) A Hough transform based approach for extraction of buildings using LiDAR data is presented. It is argued that LiDAR data should be smoothed and sparsed prior to Hough transform for better result. Algorithms to realize this are presented. Further, an algorithm which fits a vector model to extracted buildings is outlined. Simulated LiDAR data have been used to investigate the effect of three parameters (data density, flying height, and scan angle) on the quality of buildings extracted. A set of accuracy indices is proposed for this purpose. It is shown that the data density is the most significant parameter affecting the accuracy of building identification. Copyright Taylor & Francis Numéro de notice : A2008-077 Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29072 [article]

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Assessment 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)

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 29 n° 5 (March 2008) . - pp 1387 - 1406 Titre : Assessment of the influence of flying altitude and scan angle on biophysical vegetation products derived from airborne laser scanning Type de document : Article/Communication Auteurs : F. Morsdorf, Auteur ; O. Frey, Auteur ; E. Meier, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 1387 - 1406 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes descripteurs IGN] altitude du capteur [Termes descripteurs IGN] angle d'incidence [Termes descripteurs IGN] angle de visée [Termes descripteurs IGN] couvert végétal [Termes descripteurs IGN] données laser [Termes descripteurs IGN] hauteur des arbres [Termes descripteurs IGN] instrumentation Toposys [Termes descripteurs IGN] Leaf Area Index [Termes descripteurs IGN] modèle numérique de terrain [Termes descripteurs IGN] parc naturel [Termes descripteurs IGN] signal laser [Termes descripteurs IGN] Suisse [Termes descripteurs IGN] télémétrie laser aéroporté Résumé : (Auteur) Airborne Laser Scanning (ALS) has been established as a valuable tool for the estimation of biophysical vegetation properties such as tree height, crown width, fractional cover and leaf area index (LAI). It is expected that the conditions of data acquisition, such as viewing geometry and sensor configuration influence the value of these parameters. In order to gain knowledge about these different conditions, we test for the sensitivity of vegetation products for viewing geometry, namely flying altitude and scanning (incidence) angle. Based on two methodologies for single tree extraction and derivation of fractional cover and LAI previously developed and published by our group, we evaluate how these variables change with either flying altitude or scanning angle. These are the two parameters which often need to be optimized towards the best compromise between point density and area covered with a single flight line, in order to reduce acquisition costs. Our test-site in the Swiss National Park was sampled with two nominal flying altitudes, 500 and 900 m above ground. Incidence angle and local incidence angle were computed based on the digital terrain model using a simple backward geocoding procedure. We divided the raw laser returns into several different incident angle classes based on the flight path data; the TopoSys Falcon II system used in this study has a maximum scan angle of + 7.15°. We compared the derived biophysical properties from each of these classes with field measurements based on tachymeter measurements and hemispherical photographs, which were geolocated using differential GPS. It was found that with increasing flying height the well-known underestimation of tree height increases. A similar behaviour can be observed for fractional cover; its respective values decrease with higher flying height. The minimum distance between first and last echo increases from 1.2 metres for 500 m AGL to more than 3 metres for 900 m AGL, which does alter return statistics. The behaviour for incidence angles is not so evident, probably due to the small scanning angle of the system used. fCover seems to be most affected by incidence angles, with significantly higher differences for locations further away from nadir. As expected, incidence angle appears to be of higher importance for vegetation density parameters than local incidence angle. Numéro de notice : A2008-081 Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29076 [article]

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A method to test differences between additional parameter sets with a case study in terrestrial laser scanner self-calibration stability analysis / Derek D. Lichti in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 2 (March - April 2008)

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 63 n° 2 (March - April 2008) . - pp 169 - 180 Titre : A method to test differences between additional parameter sets with a case study in terrestrial laser scanner self-calibration stability analysis Type de document : Article/Communication Auteurs : Derek D. Lichti, Auteur Année de publication : 2008 Article en page(s) : pp 169 - 180 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes descripteurs IGN] autoétalonnage [Termes descripteurs IGN] compensation par faisceaux [Termes descripteurs IGN] erreur systématique [Termes descripteurs IGN] orientation du capteur [Termes descripteurs IGN] point d'appui [Termes descripteurs IGN] reconstruction d'objet [Termes descripteurs IGN] stabilité [Termes descripteurs IGN] télémètre laser à balayage [Termes descripteurs IGN] télémètre laser terrestre [Termes descripteurs IGN] test statistique Résumé : (Auteur) This paper presents a new method for quantitatively assessing the impact and therefore the significance of differences between sets of additional parameters used to model systematic sensor errors. Focusing on bundle reconstruction at the sensor, simulation-based techniques have recently been proposed as superior methods to standard parameter-space hypothesis testing. This paper experimentally demonstrates the shortcoming of this approach and proposes an improved method that tests the effect of additional parameter differences on object reconstruction, which is generally of primary interest in photogrammetry. Additionally, the arbitrariness in selecting only one or two object space configurations is overcome with the new method by simulating a large number of randomly-generated but realistic control point networks for sensor orientation and a dense grid of points for object reconstruction. The experimental subject of the paper is a Faro 880 terrestrial laser scanner for which 10 sets of calibration parameters have been captured over a 13-month period. While standard parameter-space hypothesis testing indicates the instrument is not stable over this time, the new procedure shows that this is not true in all instances. Copyright ISPRS Numéro de notice : A2008-114 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29109 [article]

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Theory and reality of direct georeferencing in national coordinates / Jan Skaloud in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 2 (March - April 2008)

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Coarse orientation of terrestrial laser scans in urban environments / C. Brenner in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 1 (January - February 2008)

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EuroSDR & ISPRS Workshop Geosensor Networks, February 20 - 22 2008, Hannover Germany / Christian Heipke (2008)  

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EuroSDR workshops and projects / European Spatial Data Research EuroSDR (2008)  

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International Calibration and Orientation Workshop, EuroCOW 2008, 30 janvier - 1er février 2008, Castelldefels, Espagne / Ismael Colomina (2008)  

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Geometric accuracy assessment of QuickBird basic imagery using different operational approaches / M. Aguilar in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 12 (December 2007)

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Rational function model for sensor orientation of IRS-P6 LISS-4 imagery / V. Nagasubramanian in Photogrammetric record, vol 22 n° 120 (December 2007 - February 2008)

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Comprehensive analysis of sensor modelling alternatives for high-resolution imaging satellites / A. Habib in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 11 (November 2007)

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Investigation of physical sensor models for modelling SPOT 3 orbits / T. Kim in Photogrammetric record, vol 22 n° 119 (September - November 2007)

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Automatic and precise orthorectification, coregistration, and subpixel correlation of satellite images: application to ground deformation measurements / S. Leprince in IEEE Transactions on geoscience and remote sensing, vol 45 n° 6 Tome 1 (June 2007)

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