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Automated sensor block adjustment and local satellite positioning: benefits and perspectives for mapping applications / A. Le Guellec in Revue Française de Photogrammétrie et de Télédétection, n° 185 (Mars 2007)  

Public [article]  inRevue Française de Photogrammétrie et de Télédétection > n° 185 (Mars 2007) . - pp 31 - 38 Titre : Automated sensor block adjustment and local satellite positioning: benefits and perspectives for mapping applications Type de document : Article/Communication Auteurs : A. Le Guellec, Auteur Année de publication : 2007 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 31 - 38 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] compensation par bloc [Termes IGN] données multisources [Termes IGN] géoréférencement direct [Termes IGN] GPS-INS [Termes IGN] image à très haute résolution [Termes IGN] image aérienne [Termes IGN] image SPOT 5 [Termes IGN] orbitographie par GNSS [Termes IGN] point d'appui [Termes IGN] précision géométrique (imagerie) Résumé : (Auteur) Rigorous satellite and airborne sensor models are nowadays commonly used to set accurate mapping applications trough accurate geodesy and ground cartography. Last decade improvement have enlightened the cartography community to the performance of such physical models to improve the map accuracy to a metric -or better- cartographic accuracy limit depending on the sensor type, math model robustness, ground control point quality and error dispersion control throughout the block adjustment of large image sets. Such operations allow to produce maps from high and very high resolutions sensors, optical and SAR in different contexts and for multiples applications such as urban mapping, rural land registration, precision farming... Nevertheless, this methodology still involves some limits in the case this is wether partly farther not possible to obtain a reliable enough positional ground reference associated to the mapping project. Various orbital and ground geodetic location systems are now commonly used among earth observation satellites, such as GPS and DORIS. Some recent experimental and operational works that uses an original methodology still based on a rigorous sensor model and the support of a robust block adjustment have proven the ability to recombine series of sensor images on several orbits or flight paths. These tied together with the preservation of the sensor model, its refined earth position and support of a reliable digital elevation model, allow to georeference image blocks based on the internal airborne / spaceborne ground coordinates processed by the operator trough the satellite positioning system. Such refined ground controls and a physical rigorous sensor model association now enables image block georeferencing to the ground with a final accuracy compatible enough with mapping standards even without reliable ground planimetric reference (GCP). Several mapping tests controlled with various aerial, optical and SAR satellite sensors, such as Ikonos, Quickbird, Orbview-3, Envisat ASAR and SPOT 5, the Vexcel UltraCAM-D digital airborne camera along with IMU and GPS, as well as ground reference sources have proven that such methodology and resulting processed imagery makes possible the use of high and very high resolution satellite imagery for a much wider application field, such as marine cartography, accurately geo-positioned defense imagery recognition on remote or not accessible locations. Our scope is precisely to determine which methodology used among those described sensors would apply to which case with error dispersion control capability or not, to validate such a mapping methodology and process, and finally foresee the possible applications field for the mapping industry. Copyright SFPT Numéro de notice : A2007-398 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/PS1-03.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28761 [article]

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