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A synthetic Earth gravity model designed specially for testing regional gravimetric geoid determination algorithms / I. Baran in Journal of geodesy, vol 80 n° 1 (April 2006)
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[article]
Titre : A synthetic Earth gravity model designed specially for testing regional gravimetric geoid determination algorithms Type de document : Article/Communication Auteurs : I. Baran, Auteur ; M. Kuhn, Auteur ; S.J. Claessens, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 1 - 16 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] Australian Height Datum
[Termes IGN] Australie
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] géoïde gravimétrique
[Termes IGN] géoïde local
[Termes IGN] géoïde terrestre
[Termes IGN] modèle numérique de surface
[Termes IGN] nivellementRésumé : (Auteur) A synthetic [simulated] Earth gravity model (SEGM) of the geoid, gravity and topography has been constructed over Australia specifically for validating regional gravimetric geoid determination theories, techniques and computer software. This regional high-resolution (1-arc-min by 1-arc-min) Australian SEGM (AusSEGM) is a combined source and effect model. The long-wavelength effect part (up to and including spherical harmonic degree and order 360) is taken from an assumed errorless EGM96 global geopotential model. Using forward modelling via numerical Newtonian integration, the short-wavelength source part is computed from a high-resolution (3-arc-sec by 3-arc-sec) synthetic digital elevation model (SDEM), which is a fractal surface based on the GLOBE v1 DEM. All topographic masses are modelled with a constant mass-density of 2,670 kg/m3. Based on these input data, gravity values on the synthetic topography (on a grid and at arbitrarily distributed discrete points) and consistent geoidal heights at regular 1-arc-min geographical grid nodes have been computed. The precision of the synthetic gravity and geoid data (after a first iteration) is estimated to be better than 30 u Gal and 3 mm, respectively, which reduces to 1 u Gal and 1 mm after a second iteration. The second iteration accounts for the changes in the geoid due to the superposed synthetic topographic mass distribution. The first iteration of AusSEGM is compared with Australian gravity and GPS-levelling data to verify that it gives a realistic representation of the Earth's gravity field. As a by-product of this comparison, AusSEGM gives further evidence of the north-south-trending error in the Australian Height Datum. The freely available AusSEGM-derived gravity and SDEM data, included as Electronic Supplementary Material (ESM) with this paper, can be used to compute a geoid model that, if correct, will agree to in 3 mm with the AusSEGM geoidal heights, thus offering independent verification of theories and numerical techniques used for regional geoid modelling Numéro de notice : A2006-177 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-005-0002-z En ligne : https://doi.org/10.1007/s00190-005-0002-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27904
in Journal of geodesy > vol 80 n° 1 (April 2006) . - pp 1 - 16[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 266-06031 RAB Revue Centre de documentation En réserve L003 Disponible 266-06032 RAB Revue Centre de documentation En réserve L003 Disponible Uncovering the statistical and spatial characteristics of fine toposcale DEM error / Juha Oksanen in International journal of geographical information science IJGIS, vol 20 n° 4 (april 2006)
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Titre : Uncovering the statistical and spatial characteristics of fine toposcale DEM error Type de document : Article/Communication Auteurs : Juha Oksanen, Auteur ; Tapani Sarjakoski, Auteur Année de publication : 2006 Article en page(s) : pp 345 - 369 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] contour
[Termes IGN] données laser
[Termes IGN] erreur aléatoire
[Termes IGN] erreur systématique
[Termes IGN] Finlande
[Termes IGN] modèle d'erreur
[Termes IGN] modèle numérique de surface
[Termes IGN] propagation d'erreurRésumé : (Auteur) The aim of our study was to characterize statistical and spatial details of the errors in a fine toposcale DEM derived by contour data. The fine toposcale DEMs are typically represented in a 5-50 m grid and used in the application scale 1:10000-1:50000. The errors were determined by using high-quality reference data covering the entire study area from an airborne laser scanner. The work was motivated because of the essential role played by the correct characterization of DEM error in error-propagation studies. The results showed that the spatial autocorrelation of the fine toposcale DEM error was the result of a complex combination of random and systematic-like components, and its appropriate modelling by geostatistical methods is problematic because of the small extent of the areas in which the assumption of stationarity is valid. In addition, describing the shape of the DEM error distribution was impossible with a single parameter of dispersion. This was due to a large number of outliers, which suggests that more robust descriptors of the error should be used in addition to conventional error statistics. Numéro de notice : A2006-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810500433891 En ligne : https://doi.org/10.1080/13658810500433891 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27905
in International journal of geographical information science IJGIS > vol 20 n° 4 (april 2006) . - pp 345 - 369[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06041 RAB Revue Centre de documentation En réserve L003 Disponible 079-06042 RAB Revue Centre de documentation En réserve L003 Disponible Using characteristic spectral bands of OMIS1 imaging spectrometer to retrieve urban land surface temperature / S.Y. Zhu in International Journal of Remote Sensing IJRS, vol 27 n°7-8 (April 2006)
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Titre : Using characteristic spectral bands of OMIS1 imaging spectrometer to retrieve urban land surface temperature Type de document : Article/Communication Auteurs : S.Y. Zhu, Auteur ; Q. Yin, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 1661 - 1676 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande spectrale
[Termes IGN] corrélation automatique de points homologues
[Termes IGN] modèle de régression
[Termes IGN] réflectance
[Termes IGN] Shanghai (Chine)
[Termes IGN] température de surfaceRésumé : (Auteur) According to the reflectance spectra of various materials, this paper mainly studies the relations between inherent features indicated by different combinations of characteristic spectral bands and surface temperature for five land surface cover types in the Shanghai area. On the basis of above-analysis results, we used the built optimum regression models to retrieve surface temperature, and then the precision and feasibility of the correlation method were evaluated. Results show that a clear and high correlativity exists between characteristic spectral bands and surface temperature. The maximum error is about 2.0 K by using correlation models to estimate urban land surface temperature, and main error of retrieved temperature results from mistakenly classification and existent mixture pixels. This indicates that characteristic spectral bands can be used as a modulating parameter for the estimation of surface temperature. Numéro de notice : A2006-160 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500462147 En ligne : https://doi.org/10.1080/01431160500462147 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27887
in International Journal of Remote Sensing IJRS > vol 27 n°7-8 (April 2006) . - pp 1661 - 1676[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-06041 RAB Revue Centre de documentation En réserve L003 Disponible DEM generation using Quickbird stereo data without ground controls, using tie points only / Penggen Cheng in Geoinformatics, vol 9 n° 2 (01/03/2006)
[article]
Titre : DEM generation using Quickbird stereo data without ground controls, using tie points only Type de document : Article/Communication Auteurs : Penggen Cheng, Auteur ; C. Chaapel, Auteur Année de publication : 2006 Article en page(s) : pp 36 - 38 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] géoréférencement direct
[Termes IGN] image Quickbird
[Termes IGN] MNS SRTM
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle stéréoscopique
[Termes IGN] OrthoEngine
[Termes IGN] point d'appuiRésumé : (Auteur) This article examines the extraction of Digital Elevation Models (DEMs) from QuickBird stereo image pairs without the use of ground control points (GCPs). Due to the frequent unavailability of ground control points, a DEM generation method requiring no GCPs would be of significant interest to users of stereo data. The article also explores the refinement of extracted DEMs by applying horizontal shifts based on reference DEMs from the Shuttle Radar Topography Mission (SRTM). Numéro de notice : A2006-107 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27834
in Geoinformatics > vol 9 n° 2 (01/03/2006) . - pp 36 - 38[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 262-06021 SL Revue Centre de documentation Revues en salle Disponible Detecting roads in stabilized video with the spatio-temporal structure tensor / R. Plessl in Geoinformatica, vol 10 n° 1 (March - May 2006)
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Titre : Detecting roads in stabilized video with the spatio-temporal structure tensor Type de document : Article/Communication Auteurs : R. Plessl, Auteur Année de publication : 2006 Conférence : ACM GIS 2004, 12th ACM symposium on geographic information systems 12/11/2004 13/11/2004 Arlington Etats-Unis Selected papers Article en page(s) : pp 37 - 53 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] capteur aérien
[Termes IGN] données spatiotemporelles
[Termes IGN] extraction du réseau routier
[Termes IGN] géoréférencement
[Termes IGN] image vidéo
[Termes IGN] mise à jour de base de données
[Termes IGN] temps réel
[Termes IGN] tenseur
[Termes IGN] trafic routier
[Termes IGN] valeur propreRésumé : (Auteur) Video provides strong cues for automatic road extraction that are not available in static aerial images. In video from a static camera, or stabilized (or geo-referenced) aerial video data, motion patterns within a scene enable fonction attribution of scene regions. A "road," for example, may be defined as a path of consistent motion - a definition which is valid in a large and diverse set of environments. The spatio-temporal structure tensor field is an ideal representation of the image derivative distribution at each pixel because it can be updated in real time as video is acquired. An eigen-decomposition of the structure tensor encodes both the local scene motion and the variability in the motion. Additionally, the structure tensor field can be factored into motion components, allowing explicit determination of traffic patterns in intersections. Example results of a real time system are shown for an urban scene with both well-traveled and infrequently traveled roads, indicating that both can be discovered simultaneously. The method is ideal in urban traffic scenes, which are the most difficult to analyze using static imagery. Numéro de notice : A2006-097 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1007/s10707-005-4885-x En ligne : https://doi.org/10.1007/s10707-005-4885-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27824
in Geoinformatica > vol 10 n° 1 (March - May 2006) . - pp 37 - 53[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-06011 RAB Revue Centre de documentation En réserve L003 Disponible Détection et reconstruction de facettes 3D par approche hiérarchique par régions, à partir de couples d'images satellite THR / Nesrine Chehata in Bulletin d'information scientifique et technique de l'IGN, n° 75 (mars 2006)
PermalinkGeometric calibration of Pleiades location model / Daniel Greslou in Revue Française de Photogrammétrie et de Télédétection, n° 181 (Mars 2006)
PermalinkNear infrared photography for craniofacial anthropometric landmark measurement / A.K. Chong in Photogrammetric record, vol 21 n° 113 (March - May 2006)
PermalinkSegmentation multi-échelles d'images et applications / Laurent Guigues in Bulletin d'information scientifique et technique de l'IGN, n° 75 (mars 2006)
PermalinkThe absolute positioning of spaceborne InSAR data using the integer ambiguity method / A. Swoter in Photogrammetric record, vol 21 n° 113 (March - May 2006)
PermalinkThe STRM data "finishing" process and products / J.A. Slater in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 3 (March 2006)
PermalinkUtilisation cartographique d'images satellite à haute résolution / Valerio Baiocchi in Géomatique expert, n° 49 (01/03/2006)
PermalinkAn efficient method for identifying and filling surface depressions in digital elevation models for hydrologic analysis and modelling / L. Wang in International journal of geographical information science IJGIS, vol 20 n° 2 (february 2006)
PermalinkComparison of automated watershed delineations: effects on land cover areas, percentages, and relationships to nutrient discharges / M.E. Baker in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 2 (February 2006)
PermalinkSpatiotriangulation with multisensor HR stereo-images / Thierry Toutin in IEEE Transactions on geoscience and remote sensing, vol 44 n° 2 (February 2006)
PermalinkThe accuracy of grid digital elevation models linearly constructed from scattered sample data / F. Aguilar in International journal of geographical information science IJGIS, vol 20 n° 2 (february 2006)
Permalink3D zebra-crossing reconstruction from stereo rig images of a ground-based mobile mapping system / Bahman Soheilian (2006)
PermalinkPermalinkPermalink"Apport d'un réseau GPS temps réel centimétrique en vue de garantir l'interopérabilité des SIG entre les pays frontaliers et la France et d'assurer l'homogénéité du géoréférencement des SIG" / Madara Caunite (2006)
PermalinkAufnahmen flugzeuggetragener Laserscanner als Grundlage zur Erfassung von Strassen und Wegen in bewaldeten Gebieten [Des données par laserscanner aéroporté comme base pour l'extraction de voies et de chemins dans des régions boisées] / M. Attwenger (2006)
PermalinkAutomatic building reconstruction from a digital elevation model and cadastral data : an operational approach / Mélanie Durupt (2006)
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PermalinkCouplage de données laser aéroporté et photogrammétriques pour l'analyse de scènes tridimensionnelles / Frédéric Bretar (2006)
PermalinkElaboration de MNT par extraction de pentes topographiques de données polarimétriques / Yohann Ly (2006)
PermalinkLe grand Lyon publie son schéma directeur / Françoise de Blomac in SIG la lettre, n° 73 (janvier 2006)
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