Modern trends of education in photogrammetry & remote sensing

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Monograph

Persistent identifier:: 856467936

Title:: Modern trends of education in photogrammetry & remote sensing

Sub title:: ISPRS Commission VI Symposium, September 13 - 16, 1990, Rhodes Island, Greece

Scope:: 1 Online-Ressource (251 Seiten)

Year of publication:: 1990

Place of publication:: Athens

Publisher of the original:: Technical Chamber of Greece

Identifier (digital):: 856467936

Illustration:: Diagramme

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: The Impact of Technology on Working Methods, Education, and Professional Status in Photogrammetry and Remote Sensing. F. Ackermann.

Document type:: Monograph

Structure type:: Chapter

There is, in my opinion, no good answer to such questions, except that given possibilities tend to realize themselves. A kind of ’’horror vacui” seems to be operating by which real potential is substantiated and turned into reality with great thrust, as soon as given a chance, independent of whether the results are urgently needed or not. The preconditions and inherent features of the process make it a self-accelerating feed-back process. It seems to stem from some basic traits of western civilization which is progress-prone to a certainly unhealthy degree. Such background considerations, however, remain totally irrelevant. Certainly, as far as pho- togrammetry and remote sensing is concerned, there is no option. We are part of the technical development and are carried away with it, pushing it happily ourselves. We take advantage of it and harvest the benefits, to the better performance and the extension of our discipline. That the development shakes us up somewhat and causes certain instabilities, must be considered normal. Evolution always goes in jumps and produces discontinuities, independent of whether those who are in it feel totally comfortable. 2 The Technical Development in Photogrammetry and Re- mote Sensing 2.1 Let us review quickly some main development steps which photogrammetry and remote sensing have taken during the past 25 years. Here, only the essential features are of interest, independent of the detailed paths through which the actual development evolved. It has been said often enough that since about 1970 photogrammetry went essentially from ana log to analytical, although some analog elements still prevail, especially the continued use of photography. At present the step from analytical to digital is being taken, still with analog, and analytical elements continuing. The driving force in general has certainly been, and still is, the digital computer and its vastly increasing performance and potential. 2.2 We may distinguish a first phase of development in the 1970s which can be characterized as coordinate or computational photogrammetry and which is generally called analytical pho- tograrnmetry. Within it several milestones can be identified: The first milestone covers certainly photogrammetric point determination, aerial triangula tion, block adjustment. It started simple enough as improvement of previous methods of aerial triangulation and was in the beginning still struggling with previous concepts and with poor computer performance. However, and tins is the point to which I want to draw the attention as a general feature, it soon grew out into completely new performance which changed the situation thoroughly. The development led to a more fundamental approach, and soon the general multi station solution of the photogrammetric orientation and point determination problem emerged, pushed even further by the self-calibration method. The result was increased accuracy, at least by a factor 20, and an enormous step in economy, by the implied simplification, by the reduction of ground control points, and by the inclusion of auxiliary data and external constraints. Soon aerial triangulation was generally applied in practice, and completely new applications appeared, as for instance cadastral photogrammetry, photogeodesy, as well as special applications in close range photogrammetry or in mapping the moon. Other milestones in the development of analytical photogrammetry of similar weight can be cited. The analytical plotters and the analytical orthoprojectors have made analog instru-

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