'sponding 
S pixel is 
Pi xj 
  
  
  
nt laser 
research 
urvey of 
\ in the 
ached a 
echnical 
ently on 
perating 
herefore 
stem of 
luded in 
tribrach 
Istments 
y of the 
parable 
tyard of 
type to 
the LPM-25HA laser of the Riegl Laser Measurement Systems 
GmbH (range of view +180 degrees in the horizontal, +150 
degrees in the vertical, with a precision in positioning of 
+0.009 degrees. The laser used is the band of the nearby 
infrared, class I, with dimensions of 1.5 mm to 10 m and 60 mm 
to 60 m. The accuracy is about £8mm, the interval of distance 
from 2 m to less than 60 m, with a measurement frequency of 
1kHz). 
  
I plane 
  
    
il plane 
overlap area 
  
  
  
  
    
Reflecting targets were positioned on the surface to survey, as 
control points surveyed topographically by means of triple 
intersection. The laser information acquired have been processed 
as described above with OrthoLaser software to generate the 
orthophoto. 
To evoid errors due to overlap effects, the orthoprojection was 
done respect two projection planes (figure 12-14). 
  
  
  
  
  
Figure 12: Grid elaborations 
  
  
Figure 13-14: Ortophotos referred to the first and second plane of projection 
-307—