61 
x l\y 1 
+ 3 32]g (Dbz, , — Dbz,) + 7 (Dby,_, + Dby,) — 
y > > 
- TX, [= DX} (230) 
hy x? + h? (x — b)? + h? 
Dhu. c j (Di, 4 — Dx,) + qt Dy, = gon - Deo, — 
a (x—b) y X y-—b 
— —— Da 4 — p. — — Dbz ——Db2 3 
2 Do, 44 ^ Do, 5 Dhs, 4 M j Dbz, = 
h 
+ 7 (DX, ,— DX,) (231) 
) 
x and y in the expressions (229)—(231) refer to the nadir point of the 
photograph r — 1 as origin. 
Next we specialize the expressions (229)— (231) for certain points of 
the models. We choose the points 1—6 which are located as follows 
$0 b 4$—0 z,=b5 % — 0 X. b 
(232) 
n=0 y=0 n=d y, =d n=—dY%=—d 
For the six points (232) we obtain after substituting (232) into (229) 
(231) with minor approximations for the x- and y-coordinates. 
Dæ, — hD9,; + DX, 1 (233) 
Dr, = hDo, + DX, (234) 
Dz, = hDgp, , + DX, 1 — dDx, (235) 
Dx, = hDo, -- DX, — dD, (236) 
Dx, = hDo, , + DX, , + dDx,_, (237) 
Dx, = hDp, 4- DX, 4- dDx, (238) 
Dy, Dby, — h Do, — bD x, (239) 
Dy, Dby, — h Do, (240) 
  
  
  
  
  
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