~ 
N, P, P, N. 
mL NT 1 
| lu Eel 
3* Tov 4 t 
1 + N, +P, 9 4 -Py 2 +N, 
  
  
Fig. 7. 
sections. 
oht- 
For dependent pairs of photographs the weig 
numbers are 
9 h4 + 8 d* + 12 ñ d? 
Quy by, zZ 12 d^ 
2 eos? 9 3 A? sin? 9, 
Cu tp t Mag 
h? 
Qus, 5 d? 
h? 
(pq. — pq: 
95 
The principles of convergent aerial photogrammetry. Vertical and horizontal 
and correlation 
(374)