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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part BS. Istanbul 2004 
  
buildings. The 3D city model was generated using interactive 
digital photogrammetric restitution and the automatic city 
model generation functionality provided by DILAS. The results 
of the project consisted of a digital terrain model, orthoimages 
and a CAD-based 3D city model of Augst (Figure 9). 
In a second project a 3D model of the ancient city of Augusta 
Raurica was generated (Salathé, 2001). The basis for this 
project was an existing wooden 3D model at a scale of 1:500 
which had been established around 1960 (Figure 7). The model 
is based on an abundance of archaeological evidence and had 
thus gained a certain level of acceptance. This was an important 
pre-requisite for using this model as a basis for the digital 
reconstruction. 
Wooden 3D city model of the ancient city of Augusta 
Raurica (original scale of 1:500) 
  
Figure 7. 
The ancient city model was reconstructed using close-range 
digital photogrammetry. One result of the project was the 3D 
CAD model of the ancient city of Augusta Raurica (Figure 10). 
The ancient digital elevation model was also reconstructed 
using archeological data sets. 
  
  
  
  
  
  
  
  
  
  
  
Ancient Wooden Aerial 
DTM 3D city imagery 
model 
CAD file Digital close- Digital 3D roof 
range photo- photogrammetry » model 
grammetry 
DTM 3D city DTM Ortho- 3D city 
(ancient) model (modern) imagery model 
(ancient) (modern) 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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| DILAS 3D GIS | 
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Virtual 3D scene (G-Vista) 
  
  
  
  
  
Figure 8: Basic data, analysis and results of the 3D model 
creation of the modern city of Augst and the ancient city of 
Augusta Raurica 
In the following steps, the different data sets were imported into 
the DILAS 3D GIS (see Figure 8). In an initial step a common 
data model had to be defined. Since the data acquisition had 
taken place much earlier — without considerations for a future 
3D GIS - the data model was much coarser than in the case of 
Wildenstein. After the database import an interactive 3D scene 
was generated using the DILAS Scene Generator. The different 
data components and object classes within the 3D scene (see 
Figure 8) can dynamically be loaded and overlaid. 
  
     
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Figure 10: 3D city m 
Figure 11: 3D city model of the ancient city of Augusta Raurica 
with modern orthoimages and height model 
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