bluuebunny/crossref_metadata_2025_split huggingface dataset:
PHOTOGRAMMETRY FOR NATIONAL MAPPING IN NORTHERN IRELAND
Authors: Brand M. J. D. 
Published: July 2010

AbstractThis paper discusses the role of a small official survey organisation in the application of photogrammetric techniques to topographic mapping and in the provision of specialised survey services for government departments.RésuméOn analyse le rôle d'une petite équipe de fonctionnaires chargée d'organiser l'application des techniques photogrammétriques au levé topographique et de fournir des prestations de levés aériens aux divers ministères.ZusammenfassungIn dem Beitrag wird die Rolle einer kleinen Vermessungsbehörde bei der Anwendung photogrammetrischer Verfahren zur Herstellung topographischer Karten und der Vermittlung spezialisierter Vermessungsdienstleistungen für Regierungsstellen erörtert.
ANALYTICAL RADIAL TRIANGULATION USING VARIATION OF CO‐ORDINATES
Authors: Badjatia R. C. 
Published: July 2010

AbstractThe method of variation of co‐ordinates has been successfully applied to analytical radial triangulation. The mathematical theory and experimental results are presented in this paper. The method can be adapted to avoid the locating of conjugate principal points.RésuméOn a appliqué la méthode des variations des coordonnées à la triangulation analytique radiale. On donne les équations et les résultats des tests.ZusammenfassungDie Variation von Koordinaten wird erfolgreich für die Methode der numerischen Radialtriangulation angewendet. Es werden die mathematischen Gleichungen und die Testergebnisse angegeben. Die Methode kann auch angewendet werden, um die Anordnung konjugierter Hauptpunkte zu vermeiden.
ORTHOPHOTOMAP PRODUCTION IN A COMMERCIAL SURVEY ORGANISATION
Authors: Dougall I. S. 
Published: July 2010

AbstractThis 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.RésuméOn décrit les techniques industrielles de production d'orthophotocartes et on compare leur emploi avec celui des techniques classiques.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.
STABILITY OF RELATIVE ORIENTATION
Authors: Rostom R. S. 
Published: July 2010

AbstractThis 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.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.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.
A HYBRID PHOTOGRAMMETRIC AND IMAGE PROCESSING SYSTEM
Authors: Stove G. C. , Ritchie P. F. S. 
Published: July 2010

AbstractThe development of the Macaulay Automated Photogrammetric System (MAPS) is described. Interaction with a software based image processing system provides a unique hybrid photogrammetric and image processing system (MAPIPS). With the addition of a Wild Aviotab TA plotting table, a tri‐axis locator and PRI‐I interface, the current status of MAPIPS is discussed. Examples are given of the use of this system for natural resource surveys.RésuméIl s'agit d'une description du développement du système de photogrammétrie automatisée Macaulay (MAPS). En ajoutant à ce système tin ensemble de logiciels de base de traitement d'images, on obtient un système intégré unique hybride (MAPIPS), adapté aux traitements d'images et de photogrammétrie.La discussion porte sur l'état actuel de ce système MAPIPS que l'on a complété d'une table de restitution graphique Wild Aviotab TA, d'un système de positionnement numérique selon les 3 axes de coordonnées et d'un interface PRI‐1.Des exemples d'utilisation de ce système pour la cartographie des ressources naturelles sont donnés.ZusammenfassungBeschreibung des automatischen photogrammetrischen Systems Macaulay (MAPS). Durch Kombination mit einem Bildverarbeitungssystem ergibt sich ein unikales hybrides photogrammetrisches und ein Bildverarbeitungssystem (MAPIPS). Diskussion der gegenwärtigen Ausbaustufe, die durch Hinzunahme eines Zeichentisches Wild Aviotab TA, eines dreiachsigen Einstellgerätes und eines PRI‐I Interfaces gekennzeichnet ist. Angabe von Beispielen zur Anwendung dieses Systems bei Vermessungen für natürliche Ressourcen.
DIGITAL TECHNIQUES FOR 1:50000 SCALE MAPPING AND REVISION
Authors: Gibbons J. G. 
Published: July 2010

AbstractThis paper discusses techniques for the acquisition of digital topographic data and the automation of cartographic processes for map production used by the Surveys and Mapping Branch, Department of Energy, Mines and Resources, Canada.RésuméCe texte présente une discussion sur les techniques utilisées au Service géographique fédéral Canadien dans le domaine de la saisie des données topographiques numériques et de l'automatisation des procédés cartographiques pour la production des cartes.ZusammenfassungIm Artikel werden die Verfahren zur Gewinnung digitaler topographischer Daten und die Automation kartographischer Prozesse zur Kartenherstellung in Kanada diskutiert.
AN ALGORITHM FOR THE CALIBRATION OF AERIAL PHOTOGRAPHIC SYSTEMS
Authors: Ihemadu S. O. 
Published: July 2010

AbstractThe algorithm presented assumes a preliminary determination of the elements of inner orientation and bases its mathematical model on the collinearity condition, from which projective equations are derived. Linearisation of condition equations is based on Taylor's expansion, whilst the subsequent solution follows iteration cycles. The method aims to derive composite corrections to image coordinates, with the aid of test field data.RésuméL'auteur présente un algorithme oú l'on suppose déterminés au préalable les éléments d'orientation interne. La modélisation mathématique s'appuie sur les conditions de co‐linéarité et sur les équations qui en résultent en projection. On linéarise les équations de conditions en utilisant un développement en série de Taylor, et l'on obtient la solution correspondante par itération. La méthode vise à apporter des corrections aux coordonnées images en utilisant les données d'un polygone d'essai.ZusammenfassungBei dem dargestellten Algorithmus wird die vorläufige Bestimmung der Elemente der inneren Orientierung angenommen, und das mathematische Modell basiert aufder Kollinearitätsgleichung, woraus perspektive Gleichungen abgeleitet werden. Die Linearisierung der Bedingungsgleichungen erfolgt durch Anwendung der Taylor‐Reihe, was für die folgenden Berechnungen einen iterativen Prozess bedingt. Mit der Methode wird angestrebt, Bildkoordinaten mit Hilfe von Testfelddaten zu verbessern.
PLOTTING TABLES AND PRODUCTIVITY
Authors: Neale M. A. 
Published: July 2010

AbstractThis paper reports on some work which has been undertaken to assess the advantages of increased automation in plotting tables attached to stereoplotters.RésuméCet article fait état d'un travail qui a été entrepris en vue d'évaluer les avantages d'un accroissement de l'automatisation des tables tracantes reliées aux appareils de restitution.ZusammenfassungEs wird über Arbeiten berichtet, um Vorteile aus einer gesteigerten Automation bei Zekhentischen zu gewinnen, die an Stereokartiergeräte angeschlossen sind.
THE MAPPING OF NORTHERN GREENLAND
Authors: Bengtsson T. 
Published: July 2010

AbstractApproximately 110 sheets of orthophotomaps at a scale of 1:100000 covering all the ice, free area (300000 km2) of northern Greenland are to be produced by the Geodetic Institute of Denmark. Super‐wide angle photography at a scale of 1:150 000 was acquired in 1978. Individual models are set up in a Wild B8S stereoplotter and, after carrying out aerial triangulation, a numerical method of absolute orientation is used. A digital ground model of the entire area is established in order to enable the interpolation of contour lines, for automatic plotting and to produce control data, for the orthophotoprojector. a Wild OR1. Methods of data handling and control, accuracies and typical errors are discussed.
IMAGE ANALYSIS AND DIGITAL CARTOGRAPHY WITHIN THE NERC THEMATIC INFORMATION SERVICE: THE DEVELOPMENT OF A UNIFIED SPATIAL MODEL
Authors: Jackson M. J. 
Published: July 2010

AbstractThe 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.
A COMPARISON OF SOME BLOCK ADJUSTMENT SYSTEMS IN CURRENT USE
Authors: Smith A. B. 
Published: July 2010

AbstractEight aerial triangulation block adjustment systems were tested using two blocks of Ordnance Survey data. The iterative relaxation methods could not cope with the standard patterns of control. Bundle methods, especially with additional parameters, gave significantly better results than model adjustments. Ease of data handling and clarity of output are considered to be more important factors than absolute accuracy in choosing a block adjustment system.
XVth INTERNATIONAL CONGRESS OF PHOTOGRAMMETRY AND REMOTE SENSING
Authors: Wickens E. H. , Woodrow H. C. , Proctor D. W. , Farrow J. E. , Newton I. , Burnside C. D. , Allan J. A. , Taylor J. 
Published: July 2010

AbstractThe XVth International Congress of Photogrammetry and Remote Sensing, organised by the International Society for Photogrammetry and Remote Sensing, was held at Rio Centro. Rio de Janeiro from 17th to 29th June, 1984. Reports on the activities of the seven technical Commissions as well as on the Exhibition and the General Assembly were given to a meeting of the Photogrammetric Society on 16th October, 1984. Papers were published in the International Archives of Photogrammetry and Remote Sensing 25.
DEVELOPMENT OF AN INEXPENSIVE IMAGE SPACE PLOTTER
Authors: Carson W. W. 
Published: July 2010

AbstractThis paper discusses an inexpensive, analytical system designed for a forestry application of photogrammetry. It is presented in two parts. Part I describes an image space plotter that was built in New Zealand and is operating there. The system uses a digitising table to collect left‐hand photograph co‐ordinates. an encoded micrometer bar to measure × parallax and a mirror stereoscope for viewing photographs. The mathematical, formulation is based on simplifications first suggested by E. H. Thompson. Good accuracy in ground heights can be achieved by the system, but only poor accuracy in planimetric co‐ordinates. The cause of poor planimetric accuracy is investigated in Part II. Two error sources are apparent: the simplified analytical theory and systematic errors from the digitising table. Part II also investigates the relationship between random errors in image co‐ordinate measurements and system accuracy.
DATA PROCESSING METHODS FOR AMATEUR PHOTOGRAPHS
Authors: Gruent A. W. 
Published: July 2010

AbstractUsing modern techniques, the analysis of amateur photographs yields results with almost the same accuracy level as with metric photographs. This paper gives a classification of data processing techniques for amateur photographs and presents a well proven method for the treatment of existing amateur photographs, known as Metric Photo Perspective Transformation (MPPT). Data processing is particularly convenient and efficient if on line techniques are used. Operational procedures for the treatment of additional parameters and for the detection of blunders in a time critical on line triangulation system are proposed.
TERRAIN APPROXIMATION BY FIXED GRID POLYNOMIAL
Authors: Segu W. P. 
Published: July 2010

AbstractA method of describing terrain by a fixed grid polynomial is described. The method employs a Chebyshev polynomial with a least squares criterion of fit. The least squares fit is carried out on an iterative basis to a prescribed degree of fit, either of a root mean square residual, or of a standard deviation of the fitted surface, or of a percentage of the total sum of squares of the residuals. The fitting data overlap along the common boundaries of the grids. Interpolation at any new point is carried out patchwise. An application of the method in highway engineering is described.
REPORT ON THE METRIC CAMERA WORKSHOP AT DFVLR OBERPFAFFENHOFEN
Authors: Dowman I. J. 
Published: July 2010

AbstractThe Metric Camera workshop was held to discuss results obtained from experiences carried out by principal investigations in the Metric Camera Project. The papers divided into three groups: photogrammetric investigations, interpretation and general. The photogrammetric investigations covered tests of accuracy. Plotting, aerial triangulation and the production of digital elevation modles and orthophotographs. There was general agreement that planimetric accuracies of between 20 m and 30 m and height accuracies of about 30 m could be achieved The emphasis within the group of papers on interpretation was on geology and the maping of cultural features. Results of this work are summarised and discussed in this paper.
ON THE CALIBRATION OF UNDERWATER CAMERAS
Authors: Fryer J. G. , Fraser C. S. 
Published: July 2010

AbstractAnalytical plumbline and serf calibration techniques are applied to the calibration of two underwater cameras: a Rolleifex SLX réseau camera with an Aquamarin WKD‐SLX/6006 submarine housing and a Nikonos V underwater camera. The Rolleiflex was fitted with a 50 mm Distagon f/4 lens and the Nikonos with a 28 mm Nikkor‐UW f/3.5 lens. Comparisons of the results from the two methods of camera calibration are described. Theoretical differences are predicted for in‐air versus in‐water values for radial distortion. When these are compared to the actually observed values of distortion, an insight is provided of the precisions claimed for each method of camera calibration.
AERIAL SURVEY CAMERA TRIALS
Authors: Farrow J. E. 
Published: July 2010

AbstractDuring 1985, the opportunity arose to make some test flights with the Wild RC10A and the Zeiss (Oberkochen) RMK A 15/23 with forward motion compensation. This paper outlines the changes incorporated in modern cameras, summarises the Ordnance Survey's photogrammetric tasks, describes the test flights which were achieved and illustrates the results obtained.
AIR SURVEY COMES OF AGE IN THE ORDNANCE SURVEY OF IRELAND: 1965–1986
Authors: Walsh M. C. 
Published: July 2010

AbstractSince the mid‐1960s, the Ordnance Survey of Ireland, whose headquarters are in Dublin, has undergone great technological change. This paper emphasises the photogrammetric aspects of that change and outlines how a sophisticated range of modern equipment is used in the supply of survey data for the Irish Republic.
SERIES MAP PRODUCTION BY 42 SURVEY ENGINEER GROUP
Authors: Vickers A. J. M. 
Published: July 2010

AbstractAfter a brief explanation of the role of the Directorate of Military Survey, the paper describes the production of part of a new series of 1:100 000 scale maps of Oman by soldiers of 42 Survey Engineer Group. Starting with the design and observation of the field survey control network, continuing with aerial triangulation and plotting, followed by compilation and all stages of production from drawing to printing of the maps, the project exercised the skills of survey technician soldiers to a high degree. The paper elaborates on the unusual problems caused by the barren nature of the terrain and describes the use of advanced technology during the latter part of the project.
SMALL FORMAT AERIAL SURVEYS FROM LIGHT AND MICROLIGHT AIRCRAFT
Authors: Graham R. W. 
Published: July 2010

AbstractSmall format (SF) cameras, fitted to light or microlight aircraft, can provide an economic and convenient alternative to the more expensive conventional mapping systems. Further advantages accrue from the use of wider aperture lenses, an extensive range of easily available films and simplijed processing. These advantages can be exploited by employing light aircraft for small survey missions, such as map revision, and desktop photogrammetric systems dedicated to handling SF imagery. In this paper, an account is given of a research study involving SF map revision survey photography, using a modern microlight aircraft and a 70 mm metric camera.
MODELLING FOR DIGITAL TERRAIN AND LANDSCAPE VISUALISATION
Authors: Kennie T. J. M. , McLaren R. A. 
Published: July 2010

AbstractMethods of creating digital terrain and landscape models for regional and site specific visualisations are described. A number of alternative approaches are discussed and their relative accuracies are considered. This is followed by a review of the computer graphics procedures which can be used to render such models. Particular attention is directed towards methods for depth cueing, hidden surface removal, shading and texturing. The effects of the atmosphere and methods of producing shadows are also examined. The paper then presents varied applications of such visualisations, including small scale, regional examples and large scale, site specific applications. In conclusion, the role of photogrammetry in the process of visualisation is assessed and possible future developments in this field are identified.
STEREOMICROSCOPE PHOTOGRAMMETRY FOR THE MEASUREMENT OF SMALL OBJECTS
Authors: Mitchell H. L. , Chadwick R. G. , McCabe J. F. 
Published: July 2010

AbstractA stereoscopic microscope has been used in combination with the body of a 35 mm camera to obtain stereophotographs, at scales up to 6:1, of objects only a few millimetres in size. Subsequent stereocomparator observations have been used to deduce height differences on the objects 10 a precision, for the mean of five sets of readings, of ±0.01 mm for closely spaced points. Using more widely separated points, the precision was estimated to be ± 0.05 mm. Depths were computed using × parallaxes after a number of parameters were fixed by calibration. The large convergence angle of the microscope axes was a crucial parameter; rotations about the camera axis were found to be significant variables.
X‐RAY PHOTOGRAMMETRY OF ARTIFICIAL JOINTS
Authors: Turner‐Smith A. R. 
Published: July 2010

AbstractX‐ray photogrammetry has the potential to make a significant contribution to clinical orthopaedic practice. The features of X‐ray photogrammetry as it can be applied in the clinical setting are reviewed, together with some of the analytical methods of three dimensional reconstruction. A major effort in orthopaedics involves the further improvement in the durability of artificial hip joints, whose ultimate life is usually limited by loosening of the components within the bone. Current methods of assessment are described and a review presented of X‐ray photogrammetry of the hip. It is believed that a proposed system at Oxford combines the best features of earlier methods. Some possible developments of X‐ray photogrammetry in orthopaedics are suggested.
WAYS OF SEEING
Authors: Dowman I. J. 
Published: July 2010

AbstractThe theme of this paper is the importance of very basic communication skills which may be taken for granted. It shows how an appreciation of art can contribute to an understanding of photogrammetry and how techniques of painting and the aims of painters can aid an ability to communicate. Photogrammetrists need a mathematical background but the mathematics which is taught at school may not be enough. It is necessary to look to less conventional thinkers in order to understand, for example, how perspective and projective transformations can complement the geometric fundamentals of photography to extract information. Finally the paper explores the theme of “Ways of seeing” to see how photogrammetry and remote sensing can interact to enable practitioners to learn from each other to exploit the great wealth of information contained in an image.
THE EFFECTS OF HUMIDITY ON THE PROFILE OF PHOTOGRAPHIC PLATES
Authors: Forno C. , Kearney A. 
Published: July 2010

AbstractThis paper examines the quantitative measurements of out‐of‐plane displacement produced by the effect of humidity changes on photographic plates in an attempt to provide a compensation which can be applied in situations involving photographic measurements in unstable ambient conditions. The two approaches discussed are profile measurements by holographic methods and a mechanical transducer technique.
AN INVESTIGATION INTO THE COMPUTATIONAL PROCEDURES OF SPACE RESECTION BY COLLINEARITY EQUATIONS
Authors: Shih T. Y. 
Published: July 2010

AbstractSpace resection with collinearity equations is an elementary task in computational photogrammetry. However, two confusing issues associated with this process were identified from past teaching experiences in a third year university level course of analytical photogrammetry, These two issues, namely the formulation of observation equations and the performance of least squares adjustment, are discussed. Numerical examples are provided for illustration.
LASERTRACE
Authors: Mathie A. 
Published: July 2010

AbstractLasertrace is a high accuracy measurement system for the remote, non‐contact determination of position, velocity, or acceleration in two or three dimensions. It uses advanced two axis laser steering technology to locate and measure the angular position, from itself, of an identified point on an object under investigation. If the object subsequently moves, the steerable laser beam actually tracks the point providing updated position coordinates as it does so. An operating window of 40° in both axes guarantees system versatility in a wide range of applications.