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Orientation of optical airborne and spaceborne images for small and medium scale mapping purposes / Eija Honkavaara (1999)

Public Titre : Orientation of optical airborne and spaceborne images for small and medium scale mapping purposes Type de document : Rapport Auteurs : Eija Honkavaara, Auteur ; Mirjam Bilker, Auteur ; X. Yu, Auteur ; Juha Jaakkola, Auteur ; Harri Kaartinen, Auteur ; J. Ylonen, Auteur Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 1999 Collection : Reports of the Finnish Geodetic Institute num. 99-5 Importance : 57 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] aérotriangulation [Termes IGN] image aérienne [Termes IGN] image JERS [Termes IGN] image optique [Termes IGN] image spatiale [Termes IGN] orientation d'image [Termes IGN] orientation du capteur [Termes IGN] photographie à moyenne échelle [Termes IGN] photographie à petite échelle [Termes IGN] point d'appui [Termes IGN] point de vérification [Termes IGN] points homologues Index. décimale : 33.30 Photogrammétrie numérique Résumé : (Auteur) Recent technical progress has resulted in significant improvement of the orientation process. The most revolutionary developments include automation of tie point measurement and direct determination of orientation parameters with GPS and INS techniques. Options to be taken into account when selecting materials for mapping and methods for orientation include image type (scale; standard frame, digital camera; spaceborne, airborne), block geometry (single image orientation, aerial triangulation (AT)), ground control (targeted, untargeted, GIS data, etc.), image observations (automatic, interactive) and utilisation of directly measured orientation parameters. The task is to optimise costs, accuracy and reliability. These questions have been investigated at the Finnish Geodetic Institute (FGI) for medium and small scale mapping applications with spatial resolution and accuracy requirements for 15 m. Both theoretical and empirical considerations have been made with respect to several variables: observations of orientation parameters (GPS, no GPS, GPS processing), block structure (cross strips, no cross strips; single image, block), ground control points (GCPs, targeted, untargeted and GIS data: nationwide digital orthophotos, base maps and elevation models), image observations of tie points and GCPs (interactive, automatic) and image material (1:31 000 and 1:60 000 standard airborne images with approximately 1 m and 5 m pixel sizes; JERS/VNIR satellite images). All the airborne cases were analysed using the same strategies and checkpoints. JERSIVNIR images were analysed in parallel with the airborne images, but no comprehensive comparisons between the materials could be made because of large resolution differences. The results of GPS measurements of perspective centres showed offsets and linear drifts varying from strip to strip, but compensation in AT with minimum ground control was possible. Targeted GCPs yielded high accuracy and reliability. Untargeted GCPs and GIS data as ground control, especially digital orthophotos and DEM25, also yielded good accuracy, although care is needed to avoid problems with gross errors. With GIS data, systematic errors can also be expected. The empirical and simulation results obtained make it possible to select GCP materials for obtaining various accuracy levels in the cases of spatial resection and AT with or without GPS support. It was concluded that in block adjustment, a planimetric accuracy of 10 gm in the image and a height accuracy of 0.1%oH can be obtained by using a reasonable number of GCPs (e.g. in 4 base distances) with accuracy better than 20 µm in image. Several examples of suitable GCP materials and configurations for obtaining accuracy better than 1 m were given. High accuracy was obtained with automatic tie point measurement, but investigations are still needed concerning optimal adjustment methods and number of points. The results, however, were in any case sufficient for applications with medium quality requirements. Experiences of orientation of JERS/VNIR images with rigorous methods were good; accuracy of 0.4 pixels was obtained with only 4 GCPs. In all the cases, the results of empirical and theoretical investigations correlated as long as the assumptions were valid; therefore reliable knowledge of the quality of the materials used as the basis for orientation is an important presupposition. Numéro de notice : 67564 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44680

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Small format aerial photography / W.S. Warner (1996)

Public Titre : Small format aerial photography Type de document : Monographie Auteurs : W.S. Warner, Auteur ; R.W. Graham, Auteur ; R.E. Read, Auteur Editeur : Caithness : Whittles Publishing Année de publication : 1996 Importance : 348 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-1-870325-56-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] caméra numérique [Termes IGN] chambre métrique (prise de vues argentique) [Termes IGN] couple stéréoscopique [Termes IGN] petit format [Termes IGN] photographie à petite échelle [Termes IGN] prise de vue aérienne Index. décimale : 35.12 Prises de vues argentiques Résumé : (Editeur) This book provides an inexpensive alternative to conventional large format aerial survey. This book forms a complete guide to aerial photography operations using small cameras. From the basics of mapping, measurement and photography to all technical details of planning a survey and numerous applications and case studies, the book enables the reader to understand all aspects of the subject. The authors draw on their wealth of the experience resulting in a book that is full of practical advice and helpful hints to ensure the reader benefits fully from this flexible and cost-efficient technique. Note de contenu : Part 1 - Geometry of a single photograph ; Geometry of stereo photography : Mapping and measuring from single photographs ; Stereoscopic mapping and measuring ; Practical considerations ; Survey techniques for small format photography Part 2 - Small format instruments and photographic films ; Electronic (digital) imagery ; Camera platforms ; Camera mounts ; Mission planning ; Operational procedures ; Air survey navigation Part 3 - Multispectral photography ; Urban survey ; Small format photogrammetric surveys ; Small format aerial photography for natural resources ; Small format aerial photography for the environment; Large scale dmap revision from digital cameras. Numéro de notice : 11732 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54482

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11732-01	35.12	Livre	Centre de documentation	En réserve M-103	Disponible

Medium and small format photography for the maintenance of national mapping / Keith J. Murray in Photogrammetric record, vol 13 n° 73 (April - September 1989)  

Public [article]  inPhotogrammetric record > vol 13 n° 73 (April - September 1989) . - pp 85 - 94 Titre : Medium and small format photography for the maintenance of national mapping Type de document : Article/Communication Auteurs : Keith J. Murray, Auteur Année de publication : 1989 Article en page(s) : pp 85 - 94 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie [Termes IGN] mise à jour cartographique [Termes IGN] photographie à moyenne échelle [Termes IGN] photographie à petite échelle [Termes IGN] révision cartographique [Termes IGN] simulation Numéro de notice : A1989-109 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.1989.tb00649.x En ligne : https://doi.org/10.1111/j.1477-9730.1989.tb00649.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25069 [article]

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106-89011	RAB	Revue	Centre de documentation	En réserve L003	Disponible
106-89012	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Photographie aérienne et cartographie d'attente à très petite échelle dans les régions sahariennes / Hervé Durand De Corbiac in Bulletin [Société Française de Photogrammétrie], n° 4 (Décembre 1961)

Public [article]  inBulletin [Société Française de Photogrammétrie] > n° 4 (Décembre 1961) . - pp 7 - 12 Titre : Photographie aérienne et cartographie d'attente à très petite échelle dans les régions sahariennes Type de document : Article/Communication Auteurs : Hervé Durand De Corbiac, Auteur Année de publication : 1961 Article en page(s) : pp 7 - 12 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie [Termes IGN] carte topographique [Termes IGN] Niger [Termes IGN] petite échelle [Termes IGN] photographie à petite échelle [Termes IGN] Sahara, désert du Numéro de notice : A1961-020 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22656 [article]

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018-61041	RAB	Revue	Centre de documentation	En réserve L003	Disponible