ee UEM sy 
(392) 
constant distance z,, L the difference of the ordinates of two points in this plane 
k 
gx = g1 + (kK—1)y + y (Axa —Axa):L 
with 
n 
y-75]gn7^gi-—— De XA — A X4) iL [in — 1). 
5. 6. 7. Coordinates of the point Ny in the projection system. Dx, Dy, Dz 
being the differences in the coordinates of the points Ni. and Ni in the model 
(k—1) corrected for the systematic errors, the local deformations of the model 
and for the scale error A b:/b one has 
k—1 
Xk = X» + 
[(Dx — sDz) sin g — (Dy + 9 Dz) cos g], 
9 
- 
k- 
1 
Vk = ye +) [x —sDz) cos g + (Dy + 9 Dz) sin g]. 
9 
k—1 
Zk Ze NN Dx + ¢ Dz). 
Remark. — The method requires only one single adjustment which reduces 
in half the total time required to perform the operations. 
A check for mistakes is furnished by reading all the linear and angular 
measurements twice. 
The final adjustment can be checked on known ground control points in 
the last model and in the common points in the side lap area of two adjacent 
strips of photography. 
The method applies to extensions by assuming that the hypotheses 
Ab, = bi, As, = $1, Zn == 91; 
are true. 
It is not imposed that the last model should connect to the reference system 
of the first model.