Descripteur
Termes IGN > 1- Outils - instruments et méthodes > méthode > analyse comparative
analyse comparativeVoir aussi |
Documents disponibles dans cette catégorie (1131)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
Etendre la recherche sur niveau(x) vers le bas
Comparison of DEM generation and combination methods using high resolution optical stereo imagery and interferometric SAR data / D. Hoja in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
![]()
[article]
Titre : Comparison of DEM generation and combination methods using high resolution optical stereo imagery and interferometric SAR data Type de document : Article/Communication Auteurs : D. Hoja, Auteur ; Peter Reinartz, Auteur ; Manfred Schroeder, Auteur Année de publication : 2006 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 Article en page(s) : pp 89 - 94 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] analyse comparative
[Termes IGN] Barcelone
[Termes IGN] Bavière (Allemagne)
[Termes IGN] couple stéréoscopique
[Termes IGN] fusion de données multisource
[Termes IGN] image à résolution métrique
[Termes IGN] image ERS
[Termes IGN] image Ikonos
[Termes IGN] image optique
[Termes IGN] image radar moirée
[Termes IGN] image SPOT 5
[Termes IGN] modèle numérique de surfaceRésumé : (Auteur) Digital elevation models (DEM) from satellite data are generated mainly from two types of datasets using completely different methods: photogrammetry for optical stereo images (e.g. SPOT5, IKONOS) and interferometry for Synthetic Aperture Radar data (InSAR, e.g. ERS-Tandem, SRTM). Both generation methods show advantages and disadvantages but have similar accuracy values in comparison to a reference DEM. The paper aims at showing the potential for combined usage of several DSM (derived with different sensors and methods) to improve the overall accuracy. Some results are given for DEM fusion utilizing height error maps for each DSM and for DEM integration, where single point information from another DSM is inserted during the triangulation process. The quality of the DSM derived from one source and of the combined DSM depends on the steepness of the terrain and on the land cover type. For flat terrain or moderate hilly landscapes, a height accuracy in the order of 5 meters or better can be achieved for the mentioned sensors. Two test areas are chosen, where many different data sets are available and much knowledge exists from previous studies. The first test area is a region in the south-eastern part of Bavaria comprising a mostly hilly, post-glacial landscape including lakes and also mountains of the German Alps. The second test area is located in Catalonia, Spain, and includes the city of Barcelona as well as a mostly hilly terrain with some steep slopes and additionally the Mediterranean coast. The received DSM are compared qualitatively and quantitatively to the reference DEM with superior quality by looking at profiles and sub-area statistics. The results show that an improvement of the fused DSM and the integrated DSM can be quantitatively measured. Although the overall statistics for a larger region does show only a slight improvement, local errors can be reduced significantly so that the overall accuracy of the combined DSM is higher. Copyright SFPT Numéro de notice : A2006-641 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/T07-29.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28364
in Revue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 89 - 94[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 018-06041 RAB Revue Centre de documentation En réserve L003 Disponible Lineament analysis through remote sensing as a contribution to the identification of caves in western Lebanon / A. Shaban in Photo interprétation, vol 42 n° 4 (Décembre 2006)
[article]
Titre : Lineament analysis through remote sensing as a contribution to the identification of caves in western Lebanon Type de document : Article/Communication Auteurs : A. Shaban, Auteur ; M. Khawlie, Auteur Année de publication : 2006 Article en page(s) : pp 47 - 55 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse comparative
[Termes IGN] carte géologique
[Termes IGN] fracturation
[Termes IGN] géomorphométrie
[Termes IGN] grotte
[Termes IGN] image Ikonos
[Termes IGN] image IRS
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Quickbird
[Termes IGN] karst
[Termes IGN] Liban
[Termes IGN] linéamentRésumé : (Auteur) The carbonate terrain in Lebanon is dominated by cave structures as a reflection of the development of karstic features. The existing caves are known as a source for groundwater, as well as heritage and tourist sites. They have been given attention by water authorities and several scientific clubs and organizations. Yet, in the field there is no easily followed approach for their discovery. A large number of these caves have been identified by speleologists who spent long time and efforts to recognize their localities. This study aims to find out a systematic approach to discover new cave sites in Lebanon. In this respect, remote sensing, as a new and advanced information technique would be helpful in identifying surface karstic features. However, due to the relatively small-size of the cave openings, their allocation directly from satellite images is difficult. Therefore, this study aims to find out a relationship between the sites of existing caves and any terrain character that can help identify the sites of the unknown caves. Main among of these characters are the karstic and fracture systems, in which the later is basically observed on satellite images as linear features (the so-called lineaments). It is a comparative analysis between three components for easier study of the terrain. In the study Landsat ETM+ images merged with IRS-1 were used to produce the lineaments map. The morphometric analysis of lineament elements in Western Lebanon, and more certainly the intersection of linear features of different lengths indicate a percentage of 79% of coincidence with the sites of existing caves. The idea is to use the intersection of lineaments as possible indicator for cave citing that can be easily followed. The study reveals an encouraging pattern that can be further developed using remote sensing for easier terrain analysis. Copyright Editions Eska Numéro de notice : A2006-601 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28324
in Photo interprétation > vol 42 n° 4 (Décembre 2006) . - pp 47 - 55[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 104-06041 RAB Revue Centre de documentation En réserve L003 Disponible Mapping with orbview-3 images: information content of high-resolution satellite images / Hyseyin Topan in GIM international, vol 20 n° 12 (December 2006)
[article]
Titre : Mapping with orbview-3 images: information content of high-resolution satellite images Type de document : Article/Communication Auteurs : Hyseyin Topan, Auteur ; G. Buyuksalih, Auteur ; Karsten Jacobsen, Auteur Année de publication : 2006 Article en page(s) : pp 14 - 17 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique
[Termes IGN] 1:10.000
[Termes IGN] analyse comparative
[Termes IGN] carte topographique
[Termes IGN] image à résolution métrique
[Termes IGN] image Ikonos
[Termes IGN] image ORBVIEW
[Termes IGN] limite de résolution radiométrique
[Termes IGN] TurquieRésumé : (Auteur) The information content of OrbView-3 and Ikonos imagery is compared, using the Zonguldak area in Turkey as test area. Although OrbView-3 images are qualitatively slightly inferior to Ikonos panchromatic scenes, they can be used for the generation of topographic maps at scale 1:10,000. However, they are not suited for 1:5,000 mapping, for which scale Ikonos images also show limitations. Copyright Reed Business Information Numéro de notice : A2006-483 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28207
in GIM international > vol 20 n° 12 (December 2006) . - pp 14 - 17[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-06121 RAB Revue Centre de documentation En réserve L003 Disponible Pros and cons of the orientation of very high resolution optical space images / Karsten Jacobsen in Revue Française de Photogrammétrie et de Télédétection, n° 184 (Décembre 2006)
![]()
[article]
Titre : Pros and cons of the orientation of very high resolution optical space images Type de document : Article/Communication Auteurs : Karsten Jacobsen, Auteur Année de publication : 2006 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 Article en page(s) : pp 41 - 47 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] analyse comparative
[Termes IGN] GPS-INS
[Termes IGN] image à résolution métrique
[Termes IGN] image Ikonos
[Termes IGN] image optique
[Termes IGN] image ORBVIEW
[Termes IGN] image Quickbird
[Termes IGN] modèle par fonctions rationnelles
[Termes IGN] orientation du capteur
[Termes IGN] point d'appui
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] transformation linéaire directeRésumé : (Auteur) Very high resolution optical space images are coming more and more into competition to classical aerial images making them more important for mapping projects. The orientation process of the dominating CCD-line scanner images taken from space is quite different from the orientation of perspective photos. Different image products like nearly original images and images projected to a plane with constant height are available, this requires corresponding orientation solutions. All optical satellites are equipped with direct sensor orientation based on a positioning system, gyros and star sensors, so they can estimate the orientation parameters. For IKONOS, QuickBird and OrbView-3, this can be made without control points with a standard deviation of the ground coordinates in the range of 10 m and better. The orientation information is available as view direction from the scene centre or start of scene or as ephemeris and as rational polynomial coefficients (RPCs). This allows the determination of the scene orientation by geometric reconstruction or bias corrected RPCs using control points. In addition approximations like 3D-affine transformation, direct linear transformation and terrain related RPCs are in use. The accuracy of the methods is compared in relation to the number and distribution of the control points and the limitations of the approximations are investigated. The approximations of the orientations by 3D affine transformation and direct linear transformation can only handle images projected to a plane with constant height like IKONOS and QuickBird or Standard. For original images they are not leading to acceptable accuracy. In any case they require more and three-dimensional well distributed control points. Copyright SFPT Numéro de notice : A2006-635 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/T02-06.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28358
in Revue Française de Photogrammétrie et de Télédétection > n° 184 (Décembre 2006) . - pp 41 - 47[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 018-06041 RAB Revue Centre de documentation En réserve L003 Disponible Wind resource assessment from C-band SAR / M.B. Christiansen in Remote sensing of environment, vol 105 n° 1 (15/11/2006)
![]()
[article]
Titre : Wind resource assessment from C-band SAR Type de document : Article/Communication Auteurs : M.B. Christiansen, Auteur ; W Koch, Auteur Année de publication : 2006 Article en page(s) : pp 68 - 81 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse comparative
[Termes IGN] bande C
[Termes IGN] direction
[Termes IGN] écart type
[Termes IGN] erreur systématique
[Termes IGN] gradient
[Termes IGN] image Envisat-ASAR
[Termes IGN] image ERS-SAR
[Termes IGN] Nord, mer du
[Termes IGN] vent
[Termes IGN] vitesseRésumé : (Auteur) Using accurate inputs of wind speed is crucial in wind resource assessment, as predicted power is proportional to the wind speed cubed. First, wind speeds retrieved from a series of 91 ERS-2 SAR and Envisat ASAR images, at moderate wind speeds (2–15 m s- 1), were validated against in situ measurements from an offshore mast in the North Sea. The wind direction input, necessary for SAR wind speed retrievals, was obtained from the meteorological mast and from a local gradient analysis of wind streaks in the SAR images. A wind speed standard deviation of not, vert, similar 1.1 m s- 1 was found when in situ wind directions were used. The use of local gradient wind directions yielded a standard deviation of not, vert, similar 1.3 m s- 1. Wind speeds retrieved from three geophysical model functions (CMOD-IFR2, CMOD4, and CMOD5) were compared. The best approximation to the in situ measurements of wind speed was found for CMOD-IFR2, despite a bias on the order of - 0.3 m s- 1. CMOD4 retrievals also underestimated the wind speed, whereas the bias on CMOD5 retrievals was negligible. Then, wind resource assessments were made from the SAR-based wind observations to show how errors in wind speed from the different SAR wind retrievals were reflected in the wind statistics. The mean wind speed, obtained for all of the 91 SAR scenes, was linked closely to the bias of SAR wind retrievals. Agreement to 1 15% of the in situ measurements was found for all the wind retrieval methods tested. The accuracy of power density estimates for the entire data set was evaluated by the standard deviation of SAR wind retrievals relative to the in situ measurements. SAR wind fields retrieved with CMOD-IFR2, using in situ wind direction inputs, exactly yielded the power density predicted from in situ measurements alone. The SAR-based wind resource assessment also corresponded well to predictions from longer time series of in situ measurements. This indicates that a reliable wind resource assessment may be achieved from a series of randomly selected SAR images. The findings presented here could be useful in future wind resource assessment based on SAR images. Copyright Elsevier Numéro de notice : A2006-503 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.06.005 En ligne : https://doi.org/10.1016/j.rse.2006.06.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28227
in Remote sensing of environment > vol 105 n° 1 (15/11/2006) . - pp 68 - 81[article]Assessment of EOS aqua AMSR-E artic sea ice concentrations using Landsat-7 and airborne microwave imagery / D.J. Cavalieri in IEEE Transactions on geoscience and remote sensing, vol 44 n° 11 Tome 1 (November 2006)
PermalinkDORIS contribution to ITRF2005 / Zuheir Altamimi in Journal of geodesy, vol 80 n° 8-11 (November 2006)
PermalinkGPS time transfer: using precise point positioning for clock comparisons / François Lahaye in GPS world, vol 17 n° 11 (November 2006)
PermalinkMarch 2003 EOS Aqua AMSR-E Arctic Sea Ice Field Campaign / D.J. Cavalieri in IEEE Transactions on geoscience and remote sensing, vol 44 n° 11 Tome 1 (November 2006)
PermalinkMultiple support vector machines for land cover change detection: an application for mapping urban extensions / H. Nemmour in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 2 (November 2006)
PermalinkEvaluation of the Oceansat-1 Multi-frequency Scanning Microwave Radiometer and its potential for soil moisture retrieval / J. Wen in International Journal of Remote Sensing IJRS, vol 27 n°18 - 19 - 20 (October 2006)
PermalinkAgent-based modelling of shifting cultivation field patterns, Vietnam / M.R. Jepsen in International journal of geographical information science IJGIS, vol 20 n° 9 (october 2006)
PermalinkAirborne Lidar bathymetry [bathymétrie aérienne par lidar] / D. Millar in GIM international, vol 20 n° 10 (October 2006)
PermalinkDetermination of evolution of the altimetric mean level of western mediterranean from the Jason-1 Data: comparison with analysis of the tidal gauge measurements / M. Haddad in Bulletin des sciences géographiques, n° 18 (octobre 2006)
PermalinkComparative analysis of urban reflectance and surface temperature / C. Small in Remote sensing of environment, vol 104 n° 2 (30 September 2006)
Permalink