t with Electronic Associates Electro Dataplotter. 
-put uni 
ın 
I. B. M. 
Figure 4 
  
  
  
  
a—— CROSS SECTION 
Diagram illustrating transformation of A-8 x, y, and z co-ordinates to 
the co-ordinate system of the railway center line. 
Figure 5 
  
Circles indicate 
way after clearing and grubbing. 
of 
location of permanent control points. 
Railway right- 
Figure 6