Logic III: Classification according to the procedures or working steps as 
are generally followed in photogrammetric operations, viz., 
1. Data Acquisition; 
2. Data Processing; 
3. Data Analysis; and 
4. Applications. 
Note: These are the steps generally taken in practice for execution of 
projects. However, in view of various available techniques and concepts 
(relevant to each step separately) requiring diverse levels of academic ma- 
tirity, photogrammetry courses following this logic would be confusing and 
often irrelevant and, therefore, impractical in any academic structure. 
Logic IV : Classification according to the basic working units and corres- 
ponding mathematical theories and supporting equipment, viz., 
1. Single image photogrammetry (plus fundamentals); 
2. Double image (stereo) photogrammetry; and 
3. Multiple image photogrammetry. 
Note: This classification would be in accordance with the progressive deve- 
lopment of data handling (for example, from two-dimensional to three-dimen- 
sional, or from fewer to more numerous parameters) as also with regard to 
progressive complexities of instruments and physical-mathematical theories. 
The course materials can be easily compartmentalized as any teacher with 
sufficient experience in photogrammetry would corroborate. 
Logic V : Classification according to the developments in a text book. The 
books like those authored by Hallert, Moffitt or Wolf, each, 
provides a scheme. However, one would see also that in general 
they follow a developmental pattern in the line discussed under 
Logic IV above. 
  
Our Logic IV seems to be the best under the circumstances. Furthermore, it 
would give the greatest common approach amongst all text books of photogram- 
metry, and thus a unified approach in the world. 
SPECIFIC PATTERN OF COURSES 
In view of the above, it may be suggested that a course pattern following 
Logic IV should form the core for the undergraduate level (Fig.1). There 
would be, however, certain allied courses necessary for supplementing the 
program. On the other hand, certain additional courses would be necessary 
to build up the postgraduate program. In this spirit, the following list 
of courses is suggested : 
(1) Single image photogrammetry (with definitions and fundamentals); 
(2) Double image (or, stereo-) photogrammetry; 
(3) Multiple image photogrammetry (or, phototriangulation); 
4) 
( Instrumentation in photogrammetry (starting with cameras and 
ending with stereo- and analytical plotters); 
(5) Economics and operational practices in photogrammetry; and 
(6) Unconventional photogrammetry (on understanding unconventional 
data acquisition systems as well as on unconventional applications). 
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