CONCEPTS AND MODELS IN PHOTOGRAMMETRIC SYSTEMS
Anton Schenk
Department of Geodetic Science and Surveying
The Ohio State University
Columbus, OH 43210-1247, USA
Abstract
The present paper is a first response to the formation of a group "Concepts
and System Models" of ISP Working Group 11-6. The tasks in a typical
mapping project are analyzed in view of their present degree of
automation. While data processing tasks, such as those of analytical
photogrammetry, normally do not present significant problems when
implemented in computers, tasks at which draftsmen and operators are
good tend to resist computer solutions. Reasons for this phenomenon are
elucidated and ways to remedy this are suggested. The objective of the
paper is to stimulate interest for discussing the subject of concepts and
system models further. Readers interested in participating in the group's
activities are kindly asked to contact the author.
Introduction
On the occasion of the joint meeting of several working groups of ISP
Commission II in Rockville, it was decided to form three subgroups within
Working Group 11-6, Integrated Photogrammetric Systems. | was asked to
lead the group "Concepts and System Models.” The present paper is in
response to this assignment, and | hope it will stimulate enough interest
for discussing the subject further.
As always when new technologies and methods emerge, such as, for
example, artificial intelligence, computer vision, expert systems, digital
image processing and pattern recognition, there is a strong temptation to
apply them in different disciplines, sometimes without a clear concept,
though in good faith, to solve existing problems. At such times confusion
may arise, at least momentarily. We are at the advent of digital
photogrammetry, which marks a new, exciting and challenging era. We are
far from having a clear understanding, from well proven and accepted
methods, and from a unified terminology. Confusion is very much present,
the dust has not yet settled; concepts and system models are a necessity.
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