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  • Blackwell Publishing Ltd  (45,535)
  • 1980-1984  (20,446)
  • 1975-1979  (15,610)
  • 1965-1969  (9,321)
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  • 101
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 102
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 103
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 104
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The paper traces the history of the Wild series of rectifiers, paying particular attention to the mechanical solutions of the Newton and Scheimpflug conditions.
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  • 105
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 106
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper gives a summary of the methods that have been used for independent model aerial triangulation. A modification of one of the methods is proposed and the paper concludes with a comparison of the independent model with the classical method of triangulation.
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  • 107
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 108
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 109
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 110
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The camera is a further development of an existing type with greatly improved photogrammetric performance so that the photography can be used with first-order plotting machines. A new lens provides minimal distortion, high resolution and greatly improved marginal illumination. An entirely new shutter provides high speeds and efficiency. Laboratory results and preliminary survey trials indicate image quality and location standards of the same order as established existing cameras.
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  • 111
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Book reviews in this article:INTERNATIONAL YEAR BOOK OF CARTOGRAPHY (Vol. IV, 1964). Editor, Eduard Imhof.JUBILEE VOLUME DEDICATED TO WILLEM SCHERMERHORN ON HIS SEVENTIETH ANNIVERSARY: ESSAYS ON THE DEVELOPMENT OF PHOTOGRAMMETRY. Published by I.T.C., Delft.
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  • 112
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 113
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The paper presents research and development at the Thematic Information Service of the Natural Environment Research Council (NERC) on the topic of integrated geographic information systems. The term integrated is used to describe the incorporation of vector digitised map data and raster scanned remotely sensed data within a single computational environment and with a single interface to the user. Point sampled and statistical data can also be handled by the system. The general structure and working of the Thematic Information Service (TIS) is described only to the extent that it is relevant to providing the background to the research or to highlighting why the specific approach described has been taken.
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  • 114
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: A procedure for digital image correlation is described which is based on least squares window matching. The immediate aim is high precision parallax assessment, point transfer, and point measurement. Experiments and theory have confirmed the high accuracy potential of the method. By implementation of charge coupled device (CCD) video cameras in an analytical plotter, an experimental hardware and software configuration has been established with which the operational on line application of digital image correlation for conventional photogrammetric measuring tasks can be tested. First results of calibration and performance of the system are presented. They allow optimistic conclusions as to the further development and practical application of digital image processing in photogrammetry.
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  • 115
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Book review in this aticle:DESERTS AND ARID LANDS. Edited by F. El-Baz.IMAGES OF THE WORLD AN ATLAS OF SATELLITE IMAGERY AND MAPS. By C. Mueller-Wille with an interpretive supplement by R. M. Smith.ELEMENTS OF PHOTOGRAMMETRY. By P. R. Wolf.
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  • 116
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 117
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The essential features of equipment for mobile processing are outlined with reference to the development of small photographic laboratory vehicles for use in the Jield. The resulting air film processor, the Wainco Products Limited 392. is described and details are given of trials carried out to establish its performance for a range of tasks in both reconnaissance and survey. The tests cover the sensitometric and drying behaviour of several air films in current use and include an analysis of the dimensional stability o f j l m in the processor. Applications using direrent containers and eflectiveness in improvised situations are also described and possible future variants of the processor are suggested.
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  • 118
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 119
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 11 (1984), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 120
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 121
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper is concerned with a new technique (the terrestrial/photogrammetric (TP) technique) for the detection and compensation of systematic height errors in block aerial triangulation. The technique improves the height accuracy of such triangulation by reducing the original bridging distance, using new bands of corrected photogrammetric tie points as height control together with the original bands of the terrestrial (or ground) height control. A number of photogrammetric blocks with different characteristics and configurations have been tested in a comprehensive manner. The tests show that the TP technique gives consistent results over a wide range of circumstances and that it is a most effective, simple and inexpensive method for the compensation of systematic errors.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméCet article relate une technique nouvelle permettant de détecter et de compenser les erreurs altimétriques systématiques dans l'aérotriangulation par blocs: la technique terrestre/photogrammétrique (TP). Cette technique améliore la précision altimétrique de l'aérotriangulation en réduisant la distance de l'aérocheminement original, grâce à l'utilisation d'un canevas de points d'appuis altimétriques composés de points de liaison photogrammétriques corrigés, en supplément du canevas original de points d'appui altimétriques déterminés sur le terrain.On a essayé de manière approfondie un grand nombre de blocs dotés de caractéristiques et de configurations diverses. Les essais montrent que la technique TP fournit des résultats fiables dans un large éventail de circonstances et que c'est une méthode de compensation des erreurs systématiques efficace, simple et peu coûteuse.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungIm Artikel wird ein neues Verfahren behandelt (das terrestrisch-photogrammetrische Verfahren (TP)), das zur Aufdeckung und Kompensation system-atischer Höhenfehler in der Block triangulation dient. Es wird die Höhengenauigkeit durch Verkürzung der ursprünglichen Überbrückungsdistanz verbessert, indem neue Streifen korrigierter Verbindungspunkte als Höhenpasspunkte zusammen mit den ursprünglichen Reihen der terrestrischen Höhenpasspunkte verwendet werden. Eine Anzahl photogrammetrischer Blöcke unterschiedlicher Figur und Charakteristik wurde umfassend getestet. Die Tests zeigen, dass die TP-Methode konstante Ergebnisse für einen grossen Bereich van Möglichkeiten ergibt und dass es ein höchst effektives, einfaches und billiges Verfahren zur Eliminierung systematischer Fehler ist.
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  • 122
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 123
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 10 (1981), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The development of an automated photographic measuring system (APM) is described. A very accurate laser beam scanning microdensitometer is used to digitise the photographic plate and a series of on line computers analyses the data during scanning. The system is available as a national facility for United Kingdom astronomers and guest investigators.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn décrit un systéme automatisé de saisie de données sur cliché. Un microdensitométre à laser numérise la plaque photographique et les données sont analysées en temps réel par ordinateur. Le systeme est destiné aux astronomes du Royaume Uni et aux chercheurs y séjournant.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungBeschreibung eines automatisierten photographischen Messsystems (APM). Ein hochgenaues Laser-Mikrodensitometer wird dabei zur Digitalisierung der Bilder benutzt, undeine Serie von On-line-Rechnern analysiert die Daten während der Abtastung. Das System steht für Astronomen im Vereinigten Königreich und anderen Forschern zur Verfügung.
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  • 124
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: During June and July 1981, synthetic aperture radar imagery was acquired of selected sites in ten European countries as part of the European SAR 580 campaign. Evaluation of this imagery in the UK will be carried out by 18 approved experiments (out of 56 for Europe) when the processed data becomes available to investigators. To assist the evaluation process, a review is given of some recent research on applications of imaging radar in agricultural and urban areas. Research is described which considered the effects of terrain parameters and radar parameters on crop classification accuracy. The relative merits of a quantitative or a qualitative approach in classification of radar data are considered. Combined use of radar and Landsat data achieves a marked improvement in classification accuracy. The development of spatial filtering techniques may assist in the problem in urban areas resulting from the dependence of image tone on the relative alignment of ground features and radar look direction.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméPendant les mois dejuin et juillet 1981, on a, dans le cadre de la campagne européenne SAR 580, recueilli des données de radar imageur à synthèse d'ouverture sur des sites choisis dans une dizaine de pays d'Europe. Ces données seront évaluées au Royaume-Uni au moyen de 18 expériences ayant été acceptées (sur un total de 56 menées en Europe); ce travail commencera dès que les données une fois traitées seront distribuées aux chercheurs. Pour accompagner cette procédure d'evaluation, on fournit une analyse de quelques recherches récentes sur les applications de l'imagerie radar aux zones agricoles et urbaines.L'une de ces recherches prenait en compte les effets des paramètres liés au terrain sur l'exactitude de la classification des cultures. Les mérites réciproques des approches quantitatives et qualitatives dans la classification des données radar sont également examinés.Le recours à une combinaison de données radar et Landsat permet d'améliorer de manière significative l'exactitude de la classification. La mise en oeuvre des techniques de filtrage spatial peut aider à réduire, dans les zones urbaines, les conséquences néfastes sur la tonalité de l'image, d'objets au sol en alignement relatif avec la direction d'observation du radar.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungIm Juni und Juli 1981 erfolgten Radaraufnahmen mittels synthetischer Apertur von ausgewählten Gebieten in 10 europäischen Ländern als Teil der Europäischen SAR 580 Kampagne. Die Analyse dieser Aufzeichnungen wird im Vereinigten Königreich durch 18 (aus insgesamt 56 für Europa) bestätigte Experimente erfolgen, nachdem die Daten zur Verfügung stehen. Um den Analysenprozess zu unterstützen, wird ein Überblick über kürzliche Forschungen zu Radaraufzeichnungen in landwirtschaftlichen und städtischen Gebieten gegeben. Es werden auch Forschungen beschrieben, bei denen die Einflüsse von Geländeparametern auf die Genauigkeit der Ernteklassifizierung untersucht wurden. Der relative Wert eines quantitativen oder qualitativen Versuchs zur Klassifizierung von Radardaten wird abgeschätzt. Eine Kombination von Radarund Landsat-Daten ergibt eine merkliche Verbesserung bei Klassifizierungsgenauigkeit. Die Entwicklung von Verfahren der räumlichen Filterung kann von Wert bei städtischen Gebieten sein, weil es eine Abhängigkeit des Grauwertes von der relativen Ausdehnung von Geländecharakteristika und der Richtung der Radaraufnahme gibt.
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  • 125
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    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 126
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
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  • 127
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    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Some aspects of the XYZBLC suite of programs for aerial triangulation are described. The Ordnance Survey Bute block of photography at a scale of 1: 24000 is computed by independent models using XYZBLC. Three of the strips in the block are treated as a test block and are computed with different configurations of control. Conclusions are drawn with regard to the usefulness of height control doublets and other dense control configurations.〈section xml:id="abs1-2"〉〈title type="main"〉Résumé Quelques aspects de l'ensemble XYZBLC de logiciels d'aérotriangulation sont décrits. Le bloc Bute de l'Ordnance Survey, composé de photographies à l'échelle du 1: 24000, a été calculé par modèles indépendants avec les logiciels XYZBLC. On a considéré trois des bandes du bloc comme formant un bloc d'essai et on les a calculées avec diverses combinaisons de canevas de points d'appui. On en tire des conclusions quant à l'utilité des doublets de points d'appui altimétriques et de diverses autres configurations denses de canevas d'appui. 〈section xml:id="abs1-3"〉〈title type="main"〉Zusammenfassung Beschreibung einiger Aspekte des XYZBLC-Programmsystems zur Aero-triangulation. Ein Block des Ordnance Survey im Bildmassstab 1: 24000 wurde damit nach der Methode der unabhängigen Modelle berechnet. Drei der Streifen des Blocks wurden als Testblock behandelt und mit verschiedenen Passpunktanordnungen berechnet. Es werden Schlussfolgerungen in bezug auf die Nützlichkeit von Zwillingspunkten zur Höhenorientierung und andere dichte Passpunktanordnungen gezogen.
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  • 128
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    The @photogrammetric record 10 (1982), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The wide availability of reconnaissance frame photography, together with the advantage of high image resolution that such photography provides and the extreme flight conditions under which it can be taken, means that it is of great interest to photogrammetrists. However, the geometry of the image is invariably distorted due to the mode of operation of the camera. In this paper, the effects of the focal plane shutter and apparent image motion compensation on the geometry of the photographs are considered.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméLe fait que la photographic de reconnaissance soil très répandue, conjointe-ment aux avantages que présente la grande résolution des images fournies par ces systèmes et les conditions extrêmes de vol dans lesquelles on peut les prendre, milite pour une prise en compte de lew intérêt par les photogrammètres. Toutefois la géométrie de ces images est systématiquement déformée par suite du mode de fonctionnement de la chambre. On traite dans cet article des effets de l'obturateur focal et de la compensation du filé de l'image sur la géométrie des photographies.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungDie grosse Verbreitung von Erkundungsfotos zusammen mit der grossen Auflösung solcher Fotos und den extremen Bedingungen unter denen sie auf-genommen wurden, lassen diese auch für den Photogrammeter interessant erscheinen. Die Geometrie dieser Bilder ist jedoch infolge der speziellen Kamera-funktion verzerrt. Im Artikel werden die Einflüsse des Schlitzverschlusses und des Bildwanderungsausgleichs auf die Bildgeometrie untersucht.
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  • 129
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    The @photogrammetric record 10 (1982), S. 0 
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  • 130
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    The @photogrammetric record 10 (1982), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Book Reviewed in this article:AERIAL PHOTOGRAPHY. By G. S. Kumar.MANUAL OF PHOTOGRAMMETRY (Fourth Edition). Editor-in-Chief: C. C. Slama.
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  • 131
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    The @photogrammetric record 10 (1982), S. 0 
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  • 132
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    The @photogrammetric record 10 (1981), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Two complementary measuring instruments are described which use a very simple principle and which take three dimensional measurements or plots directly from small objects. The first instrument can achieve accuracies of ± 0·3 mm on objects whose largest dimension is 300 mm. The second can achieve ± 0·02 mm on objects smaller than a 25 mm cube.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn présente deux instruments de mesure complémentaires el de principe très simple permettant de relever dans l'espace des coordonnées sur de petits objets, le premier avec une exactitude de ± 0.3 mm sur des objets de dimension inférieure à 300 mm, le second avec une exactitude de ± 0.02 mm sur des objets de dimension inférieure à 25 mm.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungBeschreibung von zwei Zusatzmessgeräten, die auf einem sehr einfachen Prinzip beruhen und mit denen dreidimensionale Messungen oder Auswertungen von kleinen Objekten direkt durchgeführt werden konnen. Mil dem ersten Gerät kann eine Genauigkeit von ± 0,3 mm bei maximalen Objekt abmessungen von 300 mm und mit dem zweiten von ± 0,02 mm bein Objekten, die kleiner als ein 25 mm-Kubus sind, erreicht werden.
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  • 133
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    The @photogrammetric record 10 (1981), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 134
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    The @photogrammetric record 10 (1981), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper outlines the technical procedures used in commercial orthophotomap production and attempts to identify some of the main differences in technical approach between orthophotomapping and conventional line mapping.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn décrit les techniques industrielles de production d'orthophotocartes et on compare leur emploi avec celui des techniques classiques.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungSkizzierung der Technologien, die bei der kommerziellen Herstellung von Orthofotokarten angewendet werden, wobei versucht wird, die hauptsächlichen Unterschiede der Techniken zur Herstellung von Orthofotokarten und konventionellen Strichkarten aufzudecken.
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  • 135
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    The @photogrammetric record 10 (1981), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper investigates the effect of the deviation of measured points from the standard locations when carrying out a relative orientation of a stereomodel. The analytical solution of more than 100 cases was considered and, for each case, the weights for the elements of relative orientation and the correlation coefficients were evaluated. The stability of the solution was studied by calculating the characteristic roots of the matrix of normal equations.It is shown that, theoretically, the solution of the relative orientation problem can always be achieved whenever the locations of the measured points satisfy stated geometrical requirements. However, the reliability of the solution depends on their exact positions in the stereomodel. When the accuracy is too low, in practice there is no solution.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn étudié l'effet sur l'orientation relative d'un couple de variations de position des points de base. Plus de 100 cas ont été considérés et à chaque fois ont été estimées les précisions des paramètres calculés ainsi que leur correlation. On a de plus, étudié la stabilité de la solution par l'intermédiaire des valeurs propres de la matrice normale.Il n'est pas indispensable, en principe, d'imposer de contraintes précises au choix des points de base; mais de ce choix dépend la fiabilité de la solution, faible s‘il est par trop fantaisiste.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungIn der Arbeit wird der Einfluss der Abweichung der gemessenen Punkte von ihrer Standardlage bei relativer Orientierung eines Stereomodells untersucht. Dazu werden mehr als 100 analytische Lösungen analysiert und für jeden Fall die Gewichte der Elemente der relativen Orientierung und die Korrelationskoeffizienten berechnet. Die Stabilität der Lösung wurde durch Berechnung der charakteristischen Wurzeln der Matrix der Normalgleichungen abgeschätzt.Es wird gezeigt, dass theoretisch immer die Lösung des Problems der relativen Orientierung erreicht werden kann, sobald die Lage der Messpunkte die geometrischen Anforderungen erfüllt. Die Zuverlässigkeit der Lösung hängt jedoch von der exakten Lage der Punkte ab. Wenn ihre Genauigkeit zu gering ist, gibt es praktisch keine Lösung.
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    Notes: An algorithm for the generation of digital ground models is described. The algorithm is based on an approximate solution and uses data obtained with simple measuring equipment. Processing of the observations is carried out by an on line desk top computer and the results of some tests are given.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn décrit un algorithme pour la génération de modèles de terrain digitaux. L'algorithme est basé sur une solution approximative et utilise des résultats obtenus avec un appareil de mesure simple. Les observations sont etudiées par une ordinateur de bureau lié directement et on donne les resultats de certains travaux.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungBeschreibung eines Algorithmus zur Erzeugung digitaler Geländemodelle. Dieser basiert auf einer Näherungslösung und verwendet Daten, die mit einfachen Messgeräten gewonnen wurden. Die Datenverarbeitung wird mit Hilfe eines Tischrechners ausgeführt, und es werden einige Testergebnisse mitgeteilt.
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    Notes: The author reviews procedures for obtaining stereomicrographs from binocular and monocular optical microscopes, from transmission and scanning electron microscopes and from an X-ray microscope. A description is given of the EMPD2 plotter for stereomicrographs and the advantages of various reconstruction techniques are considered, including a computer method used in the study of virus particles.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméL'auteur fait la revue des procédés qui permettent d'obtenir des stéréomicrographes à partir de microscopes optiques binoculaires et monoculaires, de microscopes electroniques transmetteurs et explorateurs et de microscopes radioscopiques. On donne une description de l'appareil de restituion EMPD2 pour les stéréomicrographes et on considère les avantages de diverses techniques de reconstruction, y compris d'une méthode avec ordinateur utilisée dans l'étude de particules de virus.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungDer Autor gibt einen Überblick über Verfahren zur Aufnahme von Stereomikrofotos mit Hilfe binokularer und monokularer optischer Mikroskope, mit Hilfe von Durchstrahlungs- und Abtast-Elektronenmikroskopen sowie mit einem Röntgenmikroskop. Der EMPD 2 Plotter für Mikrostereofotos und die Vorteile verschiedener Rekonstruktionsmethoden, einschliesslich eines Rechnerverfahrens zur Untersuchung von Virus-Teilchen werden erörtert.
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    Notes: Problems are sometimes encountered during the relative orientation of close range photography which has a limited usable format and a large Z range. Computer simulations and practical tests with both a comparator and a plotting instrument are used to investigate the problems and possible inaccuracies. Systematic errors in the photogrammetric model are revealed.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn rencontre souvent des difficultés lorsqu'on forme un modèle avec des clichés pris à courte distance, à format réduit et lorsque l'objet présente quelque profondeur. On a approfondi ces problèmes en utilisant conjointement simulations et essais pratiques; on a prouvé ainsi que les déformations du modèle étaient systématiques.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungMitunter ergeben sich bei der relativen Orientierung von Nahbereischsbildern Probleme, weil das nutzbare Bildformat klein und der z-Bereich gross sind. Mit Hilfe von Computer-Simulationen und praktischer Tests mit einem Komparator bzw. einem Auswertegerät wurden die Probleme und mögliche Ungenauigkeiten untersucht. Dabei wurden systematische Fehler in dem photogrammetrischen Modell aufgedeckt.
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    Notes: Water currents in an hydraulic model have been determined by means of a photogrammetric method of detecting the movement of tethered buoys. Single vertical photographs, taken by a non-metric camera, have been analysed to produce the required differential measurements. The use of a non-metric camera is justified by an analysis of the errors involved and a consideration of the requisite type of measurements.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméUne méthode photogrammétrique a été mise au point pour déterminer par mesures différentielles sur un modèle hydraulique les mouvements de bouées en vue d'étudier les courants; seules des photos verticales isolées sont prises, avec une camera non métrique, ici largement suffisante pour l'exactitude requise.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungBestimmung der Wasserströmungen in einem hydraulischen Modell durch photogrammetrische Ermittlung der Bewegung von verankerten Bojen. Einzeine Steilbilder, die mit einer Amateurkamera aufgenommen wurden, dienten zur Ableitung der geforderten Differenzen-Messungen. Die Verwendung einer Amateurkamera wird durch eine Analyse der auftretenden Fehler und eine Betrachtung der geforderten Messungswerte gerechtfertigt.
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    Notes: Book Reviewed in this article:THE GEOGRAPHER AS A MAP-MAKER. By A. Hodgkiss.ARCHITECTURAL PHOTOGRAMMETRY. By R. W. A. Dallas.BIBLIOGRAPHIA CARTOGRAPHICA Volume 4 (1977). Edited by L. Zögner.PRINCIPLES OF SURVEYING. By J. G. Olliver and J. Clendinning.THE ELEMENTS OF ASTRONOMY FOR SURVEYORS. By J. B. Mackie.JOURNËE D'ËTUDE SUR LA STËRËO-ORTHOPHOTOGRAPHIE.THE NAZI CONNECTION. By F. W. Winterbotham.AERIAL ARCHAEOLOGY. Edited by D. A. EDWARDS and C. R. Partridge.PHOTOGRAPHY BY INFRARED. ITS PRINCIPLES AND APPLICATIONS. By H. Lou Gibson.
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    Notes: This article provides a brief description of the functions and capabilities of an image generating system developed by Linotype-Paul Limited for the Royal Aircraft Establishment, Farnborough.〈section xml:id="abs1-2"〉〈title type="main"〉Résumé Cet article donne une courte description des fonctions et des possibilités d'un système generateur d'images developpé par Linotype-Paul Limited pour Royal Aircraft Establishment, Farnborough.〈section xml:id="abs1-3"〉〈title type="main"〉Zusammenfassung Kurze Beschreibung der Funktionen und Fähigkeiten eines bilderzeugenden Systems, das bei der Linotype-Paul Limited für das Royal Aircraft Establishment in Farnborough entwickelt wurde.
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    Notes: This paper describes the production of stereopairs of shadow photographs to simulate X-ray pictures and demonstrates the possibility of determining analytically the precise position in the object space of foreign bodies using a digitiser as a monocomparator and projective transformation theory to dispense with the necessity of undertaking normal inner and relative orientation analytical procedures.A model is constructed and comparison accuracy tests are made using shadow and X-ray picture pairs. The paper also suggests that the use of projective transformation theory is more appropriate in short range photogrammetry than traditional topographic stereophotogrammetric theory.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméCette communication décrit la production de couples stéréoscopiques de photographies d'ombre pour simuler des radiogrammes et démontre la possibilité de determiner analytiquement la position exacte dans l'espace de l'objet de corps étrangers en utilisant un transformateur digital comme mono comparateur et une théorie de transformation projective pour dispenser de la nécessité d'entreprendre les procédés normaux d'orientation analytique interieurs et relatifs.On construit un modèle et on fait des testes précis de comparaison en utilisant des couples de photographies d'ombre et de radiogrammes. La communication suggère aussi que l'utilisation de la théorie de transformation projective est plus appropriée pour la photogrammétrie à champs court que la théorie traditionnelle de stéréophotogrammétrie topographique.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungIm Artikel wird die Herstellung von Stereobildpaaren von Schatten-Fotos beschrieben, womit Röntgenbilder simuliert und die Möglichkeit der analytischen Bestimmung der präzisen Lage von Fremdkörpern im Objektraum gezeigt werden sollten. Dazu wurde ein Monokomparator als Digitalisiervorrichtung und die Theorie der projektiven Transformation angewendet, urn auf die sonst übliche analytische Bestimmung der inneren und relativen Orientierung verzichten zu können.Es wurden ein Modell konstruiert und vergleichende Genauigkeitstests für aus Schatten-Fotos bzw. Röntgenbildern bestehende Bildpaare durchgeführt. Im Beitrag wird die Meinung vertreten, dass die Theorie der projektiven Transformation bei der Nahphotogrammetrie günstiger ist, als die traditionelle Theorie der topographischen Stereophotogrammetrie.
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    Notes: Stimulated by promising overseas results with colour aerial photography and encouraged by its potential for solving local problems, the Forests Commission, Victoria, embarked on a series of trials with colour photography in 1965. Early results showed great promise and resulted in further work. This paper describes the methods and results of 70 mm and 35 mm trials concerned with the evaluation of various photographic films. An important aim of the study was to build up a working knowledge of the techniques of using aerial films other than conventional panchromatic black and white and to assess their value under Australian conditions.〈section xml:id="abs1-2"〉〈title type="main"〉Résumé Stimulés par les résultats obtenus outre-mer en matière de photo aérienne en couleur, et disposant d'un potentiel adéquat, le Forests Commission, Victoria a entrepris en 1965 une série d'essais, dès le départ très encourageants. On décrit ici les essais d'évaluation de différents types de film (70 mm et 35 mm); le but était de se familiariser avec la couleur et d'en étudier les conditions d'emploi sous les latitudes australiennes.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungAngeregt durch erfolgversprechende Ergebnisse mit Farbluftbildern in Übersee und ermutigt durch die Möglichkeiten zur Lösung lokaler Probleme unternahm die Forstkommission in Viktoria (Australien) eine Reihe von Versuchen mit Farbaufnahmen im Jahre 1965. Diese Versuche erwiesen sich vielversprechend und wurden fortgesetzt. Im Artikel werden die Verfahren und Ergebnisse von Versuchen mit 70 mm und 35 mm Aufnahmen zur Bewertung verschiedener photographischer Materialien beschrieben. Ein wichtiges Ziel der Untersuchung war das Erlangen von Kenntnissen über die Verfahren zur Verwendung nichtkonventioneller panchromatischer Schwarz-Weiss-Filme und deren Bewertung unter australischen Bedingungen.
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    Notes: A short review is given of photogrammetric methods in use for the test recording of petroglyphs and archaeological sites. Two simple field methods employed by archaeologists to record petroglyphs are also described in order to highlight the complexity of photogrammetric techniques and to query their validity.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméBrève revue de méthodes photogrammétriques en usage pour enregistrer pétroglyphes et sites archéologiques. On décrit en sus deux méthodes employees par les archéologues dont la simplicité contraste avec la complexité des méthodes photogrammétriques.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungKurzer Bericht über die photogrammetrischen Verfahren zur versuchs-weisen Aufzeichnung von Petroglyphen und archäologischen Fundstätten. Zwei von Archäologen zur Aufzeichnung von Petroglyphen verwendete einfache Feldverfahren werden ebenfalls beschrieben, um die Komplexität der photogrammetrischen Methoden zu beleuchten und ihre Richtigkeit zu überprüfen.
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    Notes: The CP1 plotter has been employed to produce, from low altitude aerial photography, a detailed map at a scale of 1: 1000 of a major landslide which occurred in an urban area of Hong Kong with extreme relief differences. Geomorphological features of the landslide could be interpreted easily from the aerial photographs and shown on the map which provided an accurate record of the disaster. Experiments with computer mapping of the landslide using a limited number of height points obtained by the CP1 plotter have also been carried out and the results indicated that useful data could be obtained rapidly to meet urgent needs for the preliminary stage of investigation and the planning of reconstruction works after the disaster.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméA partir d'une couverture aérienne à faible altitude, on a restitué au CP1 et à l'échelle du 1: 1000 une carte détaillée d'un important glissement de terrain survenu à Hong Kong et présentant d'extrêmes variations de relief. Les caractéristiques géomorphologiques du glissement aisément perçues sur les photos aériennes ont été reportées sur la carte. On a mené d'autre part des essais de cartographie numérique à partir de semis produits par le CP1, qui prouvent qu'on peut ainsi obtenir rapidement des données utiles aux enquêtes et mise sur pied des travaux de reconstruction.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungDer CP1 Plotter wurde zur Herstellung einer detaillierten Karte im Massstab 1: 1000 nach Luftbildern aus geringer Flughöhe verwendet, um einen grösseren Erdrutsch mit extremen Höhenunterschieden im Stadtgebiet von Honkong zu kartieren. Die geomorphologischen Erscheinungen des Erdrutsches konnten leicht an Hand der Luftbilder interpretiert und auf der Karte dargestellt werden, die eine genaue Aufzeichnung der Katastrophe vermittelte. Es wurden auch Versuche mit einer rechnergesteuerten Kartierung des Erdrutsches mit Hilfe einer begrenzten Menge von Höhenpunkten, die mit dem CP1 Plotter gemessen wurden, durchgeführt. Die Ergebnisse besagten, dass dadurch wichtige Daten schnell ermittelt werden können, um dringende Anforderungen für eine vorläufige Einschätzung sowie die Planung des Wiederauf baus nach dem Unglück zu befriedigen.
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    Notes: A close range photogrammetric system, developed around a 35 mm Pentax camera fitted with a wide angle lens (f = 21 mm) and an early Zeiss wide angle multiplex, has proved useful for both instruction and research. Student exercises involve all phases of photogrammetry, from establishing ground control to plotting, and permit the integration of useful statistical routines for data analysis. Research applications have centred on the topographic mapping of microscale landforms at scales of 1: 1 to 1: 10 with accuracies of ± 1 mm to ± 5 mm.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméUn système mis au point pour la photogrammétrie à courte distance, et dont les éléments essentiels sont une chambre Pentax (f = 21 mm) et un Zeiss grand angle multiplex, a fait la preuve de son utilité tant pour l'instruction que pour la recherche. Les exercices proposés aux étudiants comportent toutes les phases réelles, depuis l'établissement d'un canevas d'appui jusqu'à la restitution. Les applications à la recherche sont centrées sur la cartographie des microreliefs à des échelles variant de 1: 1 à 1: 10 avec des exactitudes variant de ± 1 mm à± 5 mm.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungEin Aufnahme- und Auswertesystem zur Nahphotogrammetrie, bestehend aus einer 35 mm Pentax Kamera, die mit einem Weitwinkelobjektiv (f= 21 mm) ausgerüstet war, und ein alter Weitwinkel-Multiplex von Zeiss haben sich bei der Ausbildung und Forschung als nützlich erwiesen. Bei den studentischen Übungen werden alle Phasen der Auswertung von der Passpunktbestimmung im Gelände bis zur Stereokartierung erfasst, wobei es auch möglich ist, statistische Tests zur Datenanalyse einzubeziehen. Die Forschungsarbeiten konzentrierten sich auf die Herstellung topographischer Karten von kleinmassstäbigen Geländeformen in den Massstäben 1: 1 bis 1: 10 mit Genauigkeiten von ± 1 mm bis ± 5 mm.
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    Notes: A model of a multiple box girder bridge, constructed at a scale of 1: 12, was subjected to an ultimate load test. Deformations were measured photogrammetrically using the method of false parallax. Modifications to the method are described which were necessary to accommodate the three dimensional object and to allow for the fact that the camera stations were not constant from one load stage photograph to the next. An accuracy of ± 0·2 mm in the measured deformations was achieved.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméUn modèle de boîte de vitesse à l'échelle 1: 12 est soumis à des essais de rupture; on mesure les déformations par photogrammétrie, en utilisant la méthode de la “pseudo-parallaxe”; des modifications ont dûêtre apportées à la méthode pour tenir compte du volume de l'objet et de la variation des points de vue entre les différents états de charge. On a obtenu une exactitude de ± 0·2 mm.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungEin Modell einer Hohlkasten-Balkenbrücke im Masstab 1: 12 wurde einem maximalen Belastungstest unterworfen. Die Deformationen wurden dabei photogrammetrisch mit Hilfe von Pseudoparallaxen gemessen. Beschreibung der Veränderungen der Methode, die wagen der Anpassung an das dreidimensionale Objekt notwendig waren und der Tatsache Rechnung trugen, dass die Kammerstandpunkte bei den Belastungen nicht konstant blieben. Die Deformationen konnten mit einer Genauigkeit von ± 0·2 mm bestimmt werden.
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    Notes: This paper describes the modification, calibration and testing of a non-metric Linhof Technika View camera for use in the stereophotogrammetric mapping and analysis of dental features. The importance of correcting for errors of convergence in very short range stereophotogrammetry is stressed.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn décrit les modification, étalonnage et test d'une chambre non métrique Linhof-Technika en vue de photogrammétrie dentaire; on insiste sur la nécessité qu'il y a de corriger l'erreur de convergence pour de telles études.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungBeschreibung des Umbaus, der Kalibrierung und der Testung einer nichtmetrischen Linhof-Technika-Kamera für die stereophotogrammetrische Kartierung und Analyse von Zahnstrukturen. Betonung der Bedeutung der Korrektur von Konvergenzfehlern bei der Nahphotogrammetrie mit sehr geringen Aufnahmeentfernungen.
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    Notes: The fourth biennial symposium of the Photogrammetric Society was held at the University of Birmingham on 22nd to 24th April and was dedicated to the memory of the late Professor E. H. Thompson. Nine papers were delivered. The first three were concerned with the life and work of Professor Thompson. Other speakers dealt, in turn, with future instrumentation in photogrammetry; aerial triangulation and film stability; photomaps and tests related to the perception of map users; map revision; and the recording of archaeological information. The majority of the papers are published in this issue of The Photogrammetric Record.〈section xml:id="abs1-2"〉〈title type="main"〉Résumé Le quatrième symposium biannuel de la Photogrammetric Society s'est tenu à l'université de Birmingham du 22 au 24 avril et était dédiéà la mémoire de feu le professeur Thompson. Il y eut neuf exposés, dont les trois premiers portaient sur la vie et l'oeuvre du défunt. D'autres orateurs traitèrent: de l'évolution prévisible des appareillages en photogrammétrie; de l'aérotriangulation et de la stabilité des films; des photoplans et de la manière dont Us sont accueillis par les utilisateurs de cartes; de la révision; et des cartes archéologiques. On trouvera ici la plupart de ces exposés.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungDas 4. alle zwei Jahre stattfindende Symposium der Britischen Photogrammetrischen Gesellschaft wurde vom 22. bis 24. April an der Universität Birmingham durchgeführt und war dem Gedenken an Professor E. H. Thompson gewidmet. Insgesamt wurden 9 Vorträge gehalten. Die ersten 3 befassten sich mit dem Leben und Wirken von Professor Thompson. Andere Referenten behandelten: künftige photogrammetrische Geräte, Aerotriangulation und Filmstabilität, Kartenergänzung, Bildkarten und Tests über die Auffassung der Kartennutzer, Aufzeichnung archäologischer Informationen. Die Mehrzahl der Beiträge wird im vorliegenden Heft veröffentlicht.
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    The @photogrammetric record 8 (1976), S. 0 
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    Notes: Microrelief mapping of the sea bed can only be carried out by photo-optical methods. It is shown that suitable equipment, bought off the shelf, can produce useful results. The paper describes equipment performance trials and a practical application in a study of large scale sea bed topography.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméLa cartographie du microrelief de fonds sous-marins ne peut être faite qu'à partir de photos. On montre, qu'avec un appareillage convenable on peut obtenir des résultats intéressants. On décrit les tests, ainsi qu'un travail pratique d'application à un levéà grande échelle de fonds sous-marin.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungDie kartographische Darstellung des Mikroreliefs des Meeresbodens kann nur auf photo-optischem Wege durchgeführt werden. Es wird gezeigt, dass mit einer geeigneten Ausrüstung günstige Ergebnisse erzielt werden können. Im Artikel werden Versuche zur Testung der Ausrüstung und eine praktische Anwendung zum Studium einer grossmassstäbigen Meerestopographie beschrieben.
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    Notes: Le microscope électronique à balayage donne l'image de la surface d'un objet situé dans une boîte à spécimen où a été fait le vide. Un fin pinceau d'électrons balaie la surface synchroniquement avec un tube cathodique dont l'intensité est modulée en fonction du signal secondaire émanant du spécimen. Le système présente une grande profondeur de champ; on peut donc obtenir différentes perspectives du spécimen en le photographiant sous diverses inclinaisons (perspectives qui sont centrales, mais cependant justiciables d'être traitées comme parallèles pour de forts grandissements) et donc le restituer spatialement. On donne dans la première partie les limitations pratiques de l'appareillage, ainsi que le type et les causes de distorsion de l'image. Dans la deuxième partie, on décrit les caractéristiques d'un appareil de restitution adaptéà un cas standard: grandissement des deux clichés d'un stéréogramme: fixe-angle d'ouverture du faisceau perspectif négligeable (c'est le cas pour de forte grossissements) et convergence relative des deux positions de la plaque porte-spécimen est fixe.〈section xml:id="abs1-2"〉〈title type="main"〉Zusammenfassung Das Abtast-Elektronen-Mikroskop liefert Bilder der Oberfläche von Objekten, die sich in einer Vakuum-Kammer befinden. Ein feiner Elektronenstrahl tastet die Oberfläche in Synchronisation mit einer Kathodenstrahlröhre ab, deren Lichtpunkthelligkeit von dem sekundären Elektronensignal, das von der Probe ausgeht, moduliert wird. Das System gestattet eine grosse Schärfentiefe und erlaubt dadurch verschiedene Projektionen des zu photo-graphierenden Musters durch Neigung desselben zwischen aufeinanderfolgenden Aufnahmen. Aus der Kenntnis der Geometrie der Projektion (die eine Zentralprojektion ist, jedoch für sehr stark vergrösserte Bilder annähernd als Parallel- oder Orthogonalfall behandelt werden kann) ist es daher möglich, zu dreidimensionalen Analysen durch Messung von Parallaxen zu kommen. Teil I der Arbeit handelt von den praktischen Problemen, die sowohl aus den Grenzen für die mechanische Konstruktion von Muster-Halterungen und Auswertegeräten als auch den Verzerrungen der Bilder resultieren. Teil II beschäftigt sich mit praktischen Gesichtspunkten der bewährten Auswerteinstrumente, die speziell für die Lösung eines standard-isierten Problems der Elektronenmikroskopie konstruiert wurden. Bei diesen wird die Vergrösserung der beiden Halbbilder eines Stereobildpaars konstant gehalten, der Divergenzwinkel der peripheren “Strahlen”, die sich aus dem zentralen “Strahl” ergeben, wird als vernachlässigbar angesehen (was bei Bildern mit starker Vergrösserung der Fall ist) und die Neigungswinkeldifferenz zwischen den zwei Lagen der Probe ist konstant.
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    Notes: The article describes an experiment in which a production block of aerial triangulation, observed by the method of independent models, was repeatedly computed using differing amounts and configurations of control. The block was recomputed to investigate the effects of control errors, of dispensing with the tie strips and of applying different weights to control and tie points. The connexion between the quality of the join of individual models and that of the adjusted block was also investigated.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméOn décrit une série d'essais effectués sur un bloc de production de triangulation aérienne analytique traité par la méthode des modèles indépendants, destinés àétudier l'influence du nombre et de la configuration des points du canevas d'appui, l'effet d'erreurs sur les points d'appui, l'effet des bandes transversales, et du choix des poids pour les points d'appui et de liaison. On a aussi examiné la corrélation entre la qualityé de l'enchaînement des modèles individuels et celle du bloc compensé.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungBeschreibung eines Versuchs, bei dem ein Aerotriangulationsblock aus der Produktion, der nach der Methode der unabhängigen Bildpaare beobachtet worden war, wiederholt bei verschiedenen Anzahlen und Anordnungen von Passpunkten berechnet wurde. Die Berechnungen erfolgten zur Abschätzung der Einflüsse von Passpunktfehlern. Weiter wurde der Anschluss zu Nachbarstreifen und die Anwendung verschiedener Gewichte für Pass- und Verbindungspunkte untersucht. Desgleichen wurde der Zusammenhang zwischen der Qualität des Zusammenschlusses einzelner Modelle und der des ausgeglichenen Blockes untersucht.
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    Notes: The geologist's use of air photographs and the characteristics studied by photogeologists are briefly described. The influence of photographic factors such as scale, season, time of day, film type, processing, overlap and dimensional accuracy are considered from the geologist's viewpoint.
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    Notes: This paper modifies the well-known formula that corrects x-parallaxes for tilt. It shows how we can make significant improvements in accuracy with a no more complicated formula, in which the effects of ground relief are completely removed; and how we can reduce the second-order errors due to lateral (w) tilts by very large factors in favourable cases.
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    Notes: Land systems are patterns of landscape recognised on aerial photographs and mapped to define areas of similar terrain with a similar environment. Breaks of slope often form the major boundaries both between and within land systems. They can be usefully mapped from aerial photographs even if their significance can only be deduced after ground investigation. Many of the characteristics of land systems can be appreciated from aerial photographs and measurements made on the photographs can improve their quantitative description.
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    Notes: A method of slotted templet triangulation is described in which the authors have used photographs printed on a stable base as the templets. The advantages, disadvantages and possibilities of the method are discussed.
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    Notes: The paper gives, for a large number of cases, numerical errors due to using approximate, first-order, formulae for correcting x-parallaxes for tilt. The figures show that the errors are considerably smaller than might be expected. It is also shown that the root mean square of the four tilts of a pair of pictures is a reliable measure from which the effect of tilt on heights can be estimated with some confidence.
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    Notes: Research work is being undertaken by the Department of Orthodontics at Addenbrooke's Hospital, Cambridge, which involves studying the growth of children's faces in three dimensions. In evaluating the morphology of soft tissues, the advantages offered by photogrammetry have been recognised and this paper describes how the technique has been put into practice at the hospital where a stereometric instrument, equally suitable for use as a camera or as a projection plotter, has been constructed.
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    Notes: The history of the Argentine-Chile frontier is briefly reviewed. The paper then describes the photogrammetric and land-surveying work that formed part of the recent settlement of a section of the frontier, that was referred to the British Government for arbitration.
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    Notes: Topics of immediate practical interest formed the basis of the Address. Particular emphasis was placed upon problems of point transfer, pre-marking of ground control points, aerial triangulation by observation of independent models, and the status of photogrammetric operators.
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    Notes: The article describes a method of strip aerial triangulation using the Wild B8 plotter. The principal feature of the method is the transfer of exterior orientation of a camera by measurement of outer orientation parallel to successive airbases.
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    Notes: After a brief review of the history of the orthophoto mapping process and its methods, the paper describes the automatic production of orthophotographs in the BS-Stereomat. Technical details, especially of the electronics of the instrument, are given. The range of applications of an orthophoto is discussed, as well as the method's limitations.
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    Notes: Equipment manufactured in connexion with the special applications of photogrammetry has developed from very early designs, often with remarkably few changes. The first section of the paper traces this evolution up to the present time.Architectural photogrammetry has been, since Meydenbauer, one of the most important of these special applications and the second part describes some recent work of this type in England and Jordan.
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    Notes: The problem of incorporating airborne auxiliary data into an aerial triangulation block adjustment is considered. The conclusion is reached that this problem can be most readily solved by the use of a fully rigorous adjustment method. The first order adjustment equations for all types of airborne auxiliary control are developed and the method of incorporating these equations into the block solution is demonstrated. The general computing problems of the aerial triangulation block adjustment are briefly discussed and a method outlined for the incorporation of tie strips, at any angle across the block, into the adjustment without unduly increasing the storage requirements for the solution. The problem of correctly weighting the different types of available data is discussed. The paper concludes with a demonstration of the improved accuracy possible if precise aerial triangulation data are combined with apparently crude absolute airborne data.
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    Notes: The author explains one of the chief problems, the composition of a survey aircraft navigation system, facing Commission I of the International Society for Photogrammetry. The tasks to be accomplished by such a system are outlined, and some of the alternative equipment available to carry out the various aspects of this work are discussed.
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    Notes: It is well known that there exists a “danger cylinder” for space resection, analogous to the “danger circle” in the plane, on which the resection is unstable. This paper shows how the existence of this surface may be detected and draws attention to the way in which the instability differs from that in the plane.
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    Notes: A successful attempt has been made to produce design plans of large chemical plant using photogrammetric techniques, and involving the development and modification of cameras and plotting equipment. Photogrammetry has provided a solution to a problem which could not easily be solved by direct methods.
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    Notes: Book reviews in this article:PROCEEDINGS OF THE SECOND NATIONAL CONFERENCE OF SOUTH AFRICAN SURVEYORS, FEBRUARY 1964. Edited by G. H. Menzies et al.
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    Notes: Four authors review the activities of the seven Commissions of the I.S.P. at the Xth International Congress, Lisbon, 1964.
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    Type of Medium: Electronic Resource
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  • 200
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Type of Medium: Electronic Resource
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