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The combination of the different tools and 
workstation concepts into one digital workstation is 
the unavoidable next step in improving the skills of 
creation, visualization and management of 
photorealistic data of real world objects like our 
growing cities. 
  
Genenc 30 C^, Ajo Ang : rectorsie 
Hyper ecy Far conces , 
CITY'S TECHNICAL DIRECTORATES 
  
  
   
  
  
Fig. 4: Synopsis of the proposed geo server concept 
Outlook 
In the context of computer graphics applications 
the detail of geometry, the existence of texture 
and the computation of shadows and participating 
media like fog, clouds etc. is not only an issue of 
creating the object's model, but also an issue of 
rendering throughput. We are now at the beginning 
of a process where hardware and software 
developements are needed to meet the high 
requirements of human users in virtual and 
augmented reality applications and of course in 
visualization of existing objects and environments 
using digital methods. The 3D data, equiped with 
photo-realistic texture and managed via a 
distributed computer network environment, will not 
only present the geometric relationships in a city. 
It will permit to create photo-realistic renderings 
for various tasks. 
Linked with currently growing informaton and 
service systems (e.g. tele-shopping and tele- 
banking) the 3D information system wil be 
integrated into a multi media system and - based 
on the broad appeal of photorealistic data - find its 
way into commercial use. 
References: 
[Duracher et al. 1996] Duracher P., M. Maresch, 
Recording Indoor Scenes using a rotating 
Camera with linear CCD Array, accepted 
paper to ISPRS 1996, Com. |, Wien 1996 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B3. Vienna 1996 
   
   
  
     
   
  
   
   
   
  
  
  
   
   
       
   
  
   
  
  
   
    
  
  
  
  
  
  
  
  
  
  
  
  
   
  
  
   
  
  
  
  
  
  
  
  
  
  
  
  
   
     
[Fórstner et al. 1993] Fórstner W., R. Pallaske, 
Mustererkennung und  3-D  Geoinfor- 
mationssysteme, ZPF, 5/93, Karlsruhe 
1993. 
[Gruber et al. 1995a] Gruber M., S. Meissl, R. 
Böhm, Das dreidimensionale Stadtmodell 
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VGI, 1+2/95, Wien 1995. 
[Gruber et al. 1995b] Gruber M., M. Pasko, F. 
Leberl, Geometric versus texture detail in 
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Monte Verita, Birkhauser Verlag, Basel 
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[Gülch 1992] Gülch E., A knowledge based 
approach to reconstruct buildings in digital 
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[Kofler et al. 1996] Kofler M., H. Rehatschek, M. 
Gruber, A Database for a 3D GIS for 
Urban Environments supporting 
Photorealistic ^ Visualization, accepted 
paper to ISPRS 1996, Com. Il, Wien 1996 
[Lang et al. 1993] Lang F., W. Schickler, 
Semiautomatische 3D-Gebäudeerfassung 
aus digitalen Bildern, ZPF, 5/93, Karlsruhe 
1993. 
[Leberl et al. 1994] Leberl F., M. Gruber, P. 
Uray, F. Madritsch, Trade-offs in the 
Reconstruction and Rendering of 3-D 
Objects, Mustererkennung ‘94, Wien 1994 
[Maresch et al. 1996] Maresch M., P. Duracher, 
The Geometry of a Vehicle Based 3 Line 
CCD Camera System for Data acquisition 
of 3D City Models, accepted paper to 
ISPRS 1996, Com. |, Wien 1996 
[Pasko et al. 1996] Pasko M., M. Gruber, Fusion 
of 2-D GIS Data and Aerial Images for 3-D 
Building Recon-struction, accepted Paper 
to ISPRS 1996, Com. Ill, Wien 1996