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stereomodel, as long as this model is still in the stereoplotter. Quick 
access to the extensive, already complexely structured model data is 
required, the model being considered as unit. In addition to a high 
transfer speed, sufficient memory capacity for all data of the current 
model is necessary. 
In the block phase complex and large graphical structures of adjacent 
stereomodel files must be joined together unambiguously in order to 
generate data files based on a pre-defined map grid. Also, annotation 
of essential information must be carried out here. All this necessit 
ates complicated editing facilities known form existing though highly 
sophisticated graphics systems. Here, highest priority has to be given 
to very large storage capacity. The task will be performed in an off 
line mode, but sill belongs to the photogrammetric data acquisition 
and mapping process. Endproduct must be a properly structured data base 
to meet individual user requirements. WILDMAP seems to be an important 
step towards such a system. 
From Stereoplotter 
X Y Z 
Figure 1. 
Diagram of hard 
ware configuration 
HARDWARE CONFIGURATION 
An experimental stand-alone computer graphics system for photogramme 
tric stereocompilation has been set up at our university. The hardware 
consists of the following devices (Figure 1): 
* Photogrammetric stereoplotter equipped with X Y Z encoders, 
* DIREC 1 interface and display for coordinate and code output, 
manufactured by Zeiss, Oberkochen, and connected to an auxiliary 
"direc-iec" RS232-interface. 
* Tektronix 4054 graphics computing system, consisting of a 32 kByte 
stand-alone desktop computer, a direct view storage tube with 48 cm 
screen, an internal tape cassette drive with 300/450 kByte storage 
capacity, a full alphanumeric keyboard, and 10 "user definable keys". 
* Footswitch connected to DIREC 1.