262 263 
the Congresses should not be the only form of information dissemination. 
Consequently some of the Commission II Working Groups have organized, already 
during the period 1976-1980, informal colloquia in conjunction with their 
business meetings. In the period 1980-1984 the organization of these 
colloquia and workshops has become a general practice with all Commission II 
Working Groups. 
  
THE WORKING GROUPS 
The Working Groups of Commission II are composed of members representing 
  
Lve research and academic organizations, instrument manufacturers and production 
ng oriented agencies. The mode of operation of the Working Groups is influenced 
irg by,the fact that an international group of this kind does not in principle 
ind represent a research team. Studies and research on particular topics are 
conducted normally by individual members or by small groups of two to three 
members. The activities of members usually reflect the activities of the 
  
S. organizations or agencies represented by them. In some cases for specific 
up themes, sub-groups are formed by Working Group members representing several 
"ic organizations cooperating on a specific project (e.g. the "ISPRS Correlation 
“he Test” of Working Group II/2). 
ley 
i"; The activities conducted by a Working Group are coordinated and the results of 
nd the research work reviewed during the Working Group meetings. The main 
nt purpose of these meetings is the exchange of information and the discussion of 
unsolved problems. Some of the Commission II Working Groups (e.g. W.G.  II/l 
and II/2) have established the practice of maintaining communication with 
las their members during the periods between the Working Group meetings by Working 
of Group newsletters. 
se 
Following is the general information on the Commission II Working Groups 
including a summary of their terms of reference and the major topics addressed 
  
  
  
  
  
and by them in the period 1980 - 1984. 
Lgn se 2 2 nn 
of Working Group II/l on "Analytical and Hybrid Instruments 
ing ; : i 
and Chairman: L.W. Fritz, NOAA/National Ocean Survey, U.S.A. 
jer Co-Chairman: G. Ducher, Institut Géographique National, France. 
Secretary: M.L. McKenzie, U.S. Geological Survey (retired), U.S.A. 
sis Working Group II/1 is concerned with the studies related to all computer- 
Dn. assisted, human controlled photogrammetric instruments such as analytical 
and plotters, hybrid instruments, and ortho-photo printers. 
1S 
to This Working Group has also assumed the responsibility for the tasks of 
ly working groups on "A System for Evaluation of Analytical Plotters" and on 
"Global Accuracy Tests for Analytical Plotters" that were active during the 
period 1976 — 1980, 
ing ; : : ns 
"es The tasks of Working Group II/1 are grouped into six areas of activities. 
La 
s l. Analytical Instrument Developments. This group of tasks is related 
to mainly to the studies of new system concepts and design principles and to the 
ire studies of the structural and functional characteristics of analytical 
ind instruments under construction. 
2. Software Development for Analytical Instruments. The main tasks are 
of concerned with the studies of basic real-time and application software and 
at related algorithms, with the analysis of on-line analytical systems using 
at