International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B3. Istanbul 2004 
  
  
EN 
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Figure 3.1- a , Iteration number 1 , Ah=7.05 m ue pP A mah. v P. BN Cag : 
Figure 4.1- Results of the final classification using the road 
method, site No. 1. 
In areas A there where no roads extracted so also the DTM 
cannot be extracted too. All building have been detected and 
removed, comparing to the results obtained by GRASS, we can 
notice that in area G there is a building which is classified as 
DTM, but using the roads net this building is easily classified 
truly as a building. 
4.2 DTM generated by robust method - figure 4.2 
  
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Figure 3.1- b, Iteration number 5 , Ah=3.05 m 
  
  
26 1C 4e 771 6] 10801701 2889. a 
  
Figure 3.1- ¢, Iteration number 8, Ah=0.05 m 
4. Results: 
For all for comparing the results of all methods we classified 
the data to three groups: 1.7 red- objects, 27] green — double 
pulse, 3. [ ]yellow — Terrain. 
    
Figure 4.3 — 3D presentation of site No. 1. 
  
  
    
   
  
    
   
  
  
   
   
     
   
   
   
    
     
     
   
    
   
Internati 
  
Figure 
4.3 The 
Combin: 
Disadva 
By using 
buildings 
points n 
although 
Disadva) 
1. 
2 
For bette 
l. 
2. 
  
Figure 4 
rc 
Site 2 
Another 
contain: | 
4.6