However, a future-oriented software system for photogrammetry and carto- 
graphy must not only provide a comprehensive range of functions but also 
user-friendly and easy handling. These apparently contradictory demands 
are detailed in Fig. 1. 
  
  
COMPLEX RANGE OF FUNCTIONS 
  
Flexible project and system 
environment 
(variable user coordinate system, 
flexible hardware configuration 
and operator environment) 
  
  
EASY HANDLING 
  
Versatile data acquisition 
  
  
  
  
  
  
  
  
  
(3D-, 2D-, geo- input) Uniformity 
Free object code definitions Flexible input 
concept 
Geometry data and attributes 
processing Menu system 
Data storage and management in <=>|Built-in intelligence 
a data base (DB) (default values 
error tolerant 
Data editing and revision input) 
Independent flexible graphics Integrated learning 
tables aids 
Demand-oriented data output Training environ- 
(graphics, listings, data ment 
  
exchange format 
  
  
  
  
Alternative "classical" acqui- 
sition/mapping methods 
  
Custom application programming Enhanced 
Photogrammetric 
Cartographic 
Information System 
  
  
  
  
  
  
  
Fig. 1: Performance and Handling Demands on Modern Software 
The demands for a comprehensive range of functions and easy handling are of 
particular significance if a software product is to be accepted and used all 
over the world by users with different backgrounds. The tuition concept of 
the PHOCUS software system developed by Carl Zeiss, West Ger-many, is used 
to illustrate how the handling of complex application soft-ware can be learnt 
quickly and efficiently in an operator-friendly environment. 
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