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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 
  
The results of this comparison are the error matrix, the accuracy 
totals and the kappa statistics. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Accuracy results for the urban image part 
ERROR MATRIX 
Classes Grass Ground Sea |Concrete| Buildings Ring road [Trees 
Grass 7 0 0 0 0 0 0 
Ground 0 8 0 0 0 0 0 
Sca 0 8 8 0 0 0 0 
Concrete 0 | 1 5 0 0 0 
Buildings 0 0 0 0 8 ] 0 
Ring road 0 l 0 2 ] 0 ] 
[Trees 0 1 0 0 0 3 7 
foul tes lw [51 7 9 4 8 
pixels 
Overall Accuracy 83.64% Kappa coefficient: 0.8090 
  
  
  
Table 8. The accuracy totals and the kappa statistics for the 
urban area 
  
Accuracy results for the hilly image part 
ERROR MATRIX 
  
  
  
  
  
  
Classes Forest |Burnt forest, Streets 
Forest 9 0 0 
Burnt forest 0 8 l 
Streets 1 3 S 
[Total test pixels 10 11 6 
  
  
  
Kappa 
J ^ Z 0, 
Overall Accuracy] 81.48% coefficient:0.7222 
  
  
  
  
  
Table 9. The accuracy totals and the kappa statistics for the 
hilly area 
6. VISUALIZATION 
Recent satellite images, as it is known, can provide not only 
more, but also more accurate information. Moreover, 2D and 
3D maps, as well as virtual flights, are more updated and 
accurate than the classical traditional maps. 
6.1 Visualization of DTM 
The process of DTM is realised, in order to obtain different 
ways of relief restoration. The produced images are: 
a) Shaded relief, in this monochromatic image the 
differences of elevation are exaggerated and the slope 
of ground is clearly shown 
b) Slope, in this image the slopes of anaglyph are 
illustrated 
c) Aspect, the slopes in this case are restored according 
to the values of azimuth 
d) Painted relief, in this multicolour image, the different 
layers of elevation are restored with gradations of 
colours | 
143 
  
  
  
  
  
  
  
  
Figure 10. The shaded relief image 
6.2 Visualization of synthetic image 
The result of this process is a new image that represents better 
the angles, the figures etc. and generally the spatial 
characteristics of the synthetic image. 
  
  
  
  
  
Figure 11. The texture of the synthetic image 
The 3D video shows a flight over the synthetic image draped on 
the DTM. The low resolution of the image and the smooth 
anaglyph affects the discrimination of the urban area and so the 
flight is more interesting over the hilly area. 
  
Figure 12. The route of the 3D video-flight