Figure 11. The smoothing 3D shape 
Each part of the walls was then placed on a DSM of Khor Rori 
area to get an overall vision of the wall circuit. Overimposing 
the wall model on the 3D terrain model made visually evident, 
the several wall circuits at different elevations. Thus, the 3D 
reconstruction of the area is not in this case the final result, but 
an intermediate step that suggests new interesting work. 
Therefore the reconstructions obtained with this approach could 
also be used as a scale model on which measurements can be 
carried out or as a tool for planning restorations. 
  
Figure 12. 3D model of the man-made structures (Autocad) 
  
Figure 13. The mosaic of rectified images used like texture 
  
Figure 14. Different views onto the 3D model of Khor Rori with 
photo-textured DEM 
4. THE CONCEPT OF VIRTUAL ARCHAELOGY 
The concept of virtual archaeology was first proposed by Paul 
Reilly (1990) to refer to the use of 3D computer models of 
ancient buildings and artefacts. The key concept is virtual, an 
allusion to a model, a replica, the notion that something can act 
as a surrogate or replacement for an original. Virtual reality is 
being used as a generic word to refer to the growing range of 
dynamic-interactive visualisation (Gillings 1999). Virtual reality 
should be defined as those environments where the human 
operator is transported into a new interactive environment by 
means of devices that display signals to the operator's sense 
organs and devices that sense various actions of the operator. 
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