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  • Artikel  (1.566)
  • American Meteorological Society  (947)
  • Blackwell Publishing Ltd  (387)
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  • 1
    Digitale Medien
    Digitale Medien
    EDITORIAL (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00625.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    ACCURACY AND COMPLETENESS OF TOPOGRAPHIC MAPPING FROM SPOT IMAGERY (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: A previous paper (Gugan, 1987) described the geometric model used to find the exterior orientation of dynamic SPOT imagery. The present paper considers the results of measurement and interpretation tests performed on a number of stereomodels. The image quality is assessed in comparison with the original digital data. Level 1A stereomodels with different base height ratios, numbers of control points and with different control point accuracies are compared. Accuracies obtained with level 1P and 1B data are also reported. The information content of the imagery is assessed by feature plotting followed by comparison with the 1:50 000 and 1:100 000 scale maps of the area. The importance of high quality photographic imagery and operator experience are noted.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00629.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    GROUND CONTROL DETERMINATION FOR REGISTRATION OF SATELLITE IMAGERY USING DIGITAL MAP DATA (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Work is reported on the production of terrain elevation data from SPOT imagery. An important step in this process is determination of exterior orientation parameters for the images. Although an initial estimate is available in the SPOT header, refinements are required based on plan and height data. These are generally derived from photogrammetric measurements (or sources such as global positioning satellite systems), but accurate manual determination is time consuming.This paper reports an alternative approach by investigating the use of existing map data (located on the earth's surface and in a known projection) to find corresponding “ground control points” in both map and image. Available maps may be in digital or paper form depending on the state of development of mapping in the part of the world being studied. The last revision date and the cartographic generalisation employed will also effect the fidelity of the final result. Practical semi-automatic techniques for determining the height of ground control points from existing map data are described, including multiple profiles through digitised contour data, a commercial terrain modelling package based on Delaunay triangulation and the use of triangulation points on prominent features.Comparisons between the methods are made and results obtained are compared with Institut Géographique National datasets and photogrammetric measurements. Methods for fully automating not only the height determination but also the location of ground control features within a map database are discussed. Map and image registration is described and illustrated using Laser-Scan's Rover software. Interactive and automated methods of registration are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00631.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    TOPOGRAPHIC MAPPING WITH SPOT 1 DATA: A PRACTICAL APPROACH BY THE ORDNANCE SURVEY (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: The Overseas Surveys Directorate (OSD) of the Ordnance Survey of Great Britain (OS) has experimented with using SPOT I HRV data for topographic line mapping at 1:100 000 scale in the Yemen Arab Republic (YAR). Results of these tests indicate that sufficient accuracy to support 1:100 000 scale mapping with a 40 m contour interval is possible but that the compilation of detail is incomplete. More emphasis on field completion and verification is required than with traditional techniques to maintain a standard 1:100 000 scale mapping specification. Costs of mapping large areas can be significantly reduced but savings are yet to be made in providing ground control. OSD has acquired expertise and hardware in a new mapping process, not to replace traditional mapping systems but to complement them under appropriate conditions. OSD has developed sufficient confidence in the use of SPOT to commit itself to mapping approximately 25 000 square kilometres of north east Yemen Arab Republic.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00633.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    AWARDS TO PHOTOGRAMMETRIC SOCIETY MEMBERS (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00637.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    BUNDLE TRIANGULATION IN ARCHITECTURAL PHOTOGRAMMETRY: THE BASILICA OF SAN FRANCESCO IN SIENA (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Bundle triangulation is an efficient tool for spatial point determination in architectural photogrammetry. All the information available in image and object space may be introduced in a combined adjustment yielding high precision and reliability. Camera calibration performed simultaneously with the object restitution process enables the application of convenient and flexible imaging systems based on professional photographic technology. Thus the survey of monuments can be carried out rapidly with a minimum of personnel and equipment. The photogrammetric recording of the basilica of San Francesco in Siena is presented as an example of the application of this survey procedure. The field work was accomplished in a few days. The equipment used consisted of a partial metric camera, an engineering theodolite and a tape. The bundle adjustment results gave spatial object co-ordinates with a r.m.s.e. of ± 15 mm for a point.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00635.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    BOOK REVIEWS (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Book review in this aticle:INTRODUCTION TO THE PHYSICS AND TECHNIQUES OF REMOTE SENSING. By C. Elachi.COMPUTER PROCESSING OF REMOTELY-SENSED IMAGES. By P. M. Mather.ARCTIC AIRMEN. B E. Schofield and R. C. Nesbit.WARBURTON'S WAR. The life of Wing Commander Adrian Warburton, DSO and Bar, DFC and Two Bars, DFC (USA). By T. Spooner.MAP PROJECTIONS—A WORKING MANUAL. By. J. P. Snyder.WORLD MAPPING TODAY. By R. B. Parry and C. R. Perkins.CONTROL SURVEYS IN CIVIL ENGINEERING. By M. A. R. Cooper.INTRODUCTION TO REMOTE SENSING. By J. B. Campbell.ANALYTICAL PHOTOGRAMMETRY. By S. K. Ghosh.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00639.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    MODELLING FOR DIGITAL TERRAIN AND LANDSCAPE VISUALISATION (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Methods 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00626.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    QUALITY ASSESSMENT OF DIGITAL ELEVATION MODELS PRODUCED BY AUTOMATIC STEREOMATCHERS FROM SPOT IMAGE PAIRS (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: A number of published steromatching algorithms have been implemented and tested on SPOT images of areas for which gridded digital elevation models (DEMs) are available with spacings of 80 m or less, as well as ground control checkpoints.Results are presented for comparison of stereomatched output with the DEMs as well as an analysis of the errors arising and their causes. Results are discussed for planimetrically geocoded and epipolar resampled data. An error budget describing effects due to orientation, feature localisation and matching are discussed and conclusions drawn for future work in this area.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00630.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    SOME ASPECTS OF HEIGHT EXTRACTION FROM SPOT IMAGERY (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 12 (1988), S. 0 
    Details
    ISSN: 1477-9730
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Military systems are becoming far more demanding in their requirement for geographical information. Military Survey must be able to support these requirements and consequently undertake a continuous evaluation of new potential sources and exploitation systems. In considering SPOT data, both the improved spatial resolution and the three dimensional capability afforded by the system must be investigated. Military Survey, together with universities and industry, is conducting trials on the accuracy and detail obtainable from both film and digital data. This paper will consider the three dimensional geometric fidelity of SPOT data using three different systems. The first exploits the data as a stereopair of diapositives using an analytical plotter. The second is a hybrid system in that the stereoscopic digital data are loaded into an image processing workstation which projects a stereo-image onto a split screen. This is then treated as “hardcopy” and is interactively exploited by a conventional stereoscope. The third system is completely digital in that height extraction is undertaken within a digital environment incorporating autocorrelation routines. Overall system errors of 10 m to 12 m (σ) were recorded for each exploitation system. Digital elevation model accuracies varied depending upon terrain type and image contrast.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1477-9730.1988.tb00632.x
    Standort Signatur Erwartet Verfügbarkeit
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