24 
loops and thus provide for high interactivity of the overall system. Hence, 
such systems may contain a high, self-adaptive capacity, which permits opti- 
mal operation. 
| Plotting Conventional Micro- 
| Device Instrument 1 k Computer 1 
a-no. Display 
Keyboard 1 
  
  
  
y 
  
  
  
  
  
  
  
  
  
  
| Device Instrument 2 Computer 2 nd Computer L 
m et 
@-no. Display 
Keyboard 2 
a 
  
  
| Plotting Conventional * Micro- = A, Mini I/O Uni s 
  
  
  
  
  
  
  
| Graphic CRT por 
HT FT EZ | Display Torminal(s) 
[Plotting — T Conventional Micro- Lo 
| Device Instrument n Computern | j 
a-no. Display 
Keyboard n 
  
  
  
  
  
  
  
  
  
  
  
  
figure 11b 
multiple system with distributive computer network (closed loop) 
Multiple systems seem to be feasible, particularly for bulk-production : 
of uniform outputs, e.g. in big national mapping organisations. For the needs e ww 
of small- and medium size organisations single computer supported systems : 
are presumably more appropriate. 
IV Future outlook 
The recent progress in computer technology promotes increasingly 
new developments in photogrammetric equipment and procedures. The 
equipment tends to grow towards integrated systems. This, however, 
decreases the impact of the conventional, universal and precision stereo-