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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004 
  
a. Patrtition of Modern Building 
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— Character 
    
    
b. Partition of Antiquity Building 
Fig.1 3D Partition of Building 
5. 3D MODEL DATABASES OF CITY 
With the development of architecture material and architecture 
technology, buildings represent different earmarks of different 
times. Even at the same time, buildings for different purposes 
have dissimilar appearances. Only in the building roof, there are 
various types (Fig.2). Because of the complexity of realistic 
world, 3D digital expression is also complex. At small regions 
with few buildings, it is possible to collect data of every 
building, but with the increasing of data at large areas, the 
abstraction method must be used. Building character appearance, 
such as colour, texture, roof shape, eave shape and etc, can be 
13 2) 
3) 42 
5) 6) d 
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General Roof 
  
summarized to some typical styles because of the limited 
architecture material and architecture technology. If we 
construct Model Databases of City firstly, by applying the 
models directly or with little modification the workload is 
reduced sharply. In the paper we founded the 3D Model 
Databases of City which is composed of Building Character 
Database, Building Texture Database, Ground Texture Database 
and Independent Object Database. Fig.3 shows the structure and 
contents of the 3D Model Databases of City. 
  
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Special Roof 
Fig.3 Roof Types 
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6. APPLICATION 
Fig.4 shows a typical scene of Weihai, which is a beautiful city 
in the east of China. We apply the methods and technologies 
discussed above in the scene construction. In the scene, there 
are six kinds of features including building, vegetation, 
independent object, traffic element, terrain and physiognomy. 
Among all the objects in the scene, the mainbody of buildings 
are solely modelled using the geometric and texture information, 
the character and adjunct of buildings are the elements of the 
building character database, the textures of lawn and road are 
picked from the ground texture database, and some other 
features including trees, street lamp and flag mast are all the 
elements of the independent object database. 
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