and we transform successively the tangents ty,, ty,, in the tx, ty with re 
ference to the system XYZ with the 
  
  
  
  
  
  
  
| tx ty, 1 | Mx | tx, ty, 1]. My 2) 
t= = 
KT Y x, ty, 11 Mz 
We introduce the (4) in the (2), we simplify and obtain 
te ty 13-0 I tp tf Bl, 5 4] oR 
to om 
X | 1a by 1| Re Je ty 1] - Ry [ty t4 1] - B, | Mz 3) 
a RNA UHR | My 
% = 
Y | tx 1, 11 > 5 ib SR Me 11 R | M, 
We can then write the orientation equations; 
[tp try 1] + 9x : 14 by Tho B [ox be te By fo 4 11 +R 14, 4 
x ty, il Uy | lé by 1] + Bx [tx ty 1 « By (tg ty 1] « By Le 
ty 1] Or jit, So thal dt 6s dl R [S 6s d]. R, | My : 
  
  
CR [by by Hr Ry ty ty 1] By | E 
whioh join the twelve unknowns x Y ^), zx. 
B, G to the known elements A E Xo To Ze 
With an analogous procedure, we obtain the equations for the case in 
which the pair i t should be used; 
  
| ty, 1| « dy [le ty 1 
S 1 8 , V fo? Wy A, 
  
  
  
  
| ta, | top | + Or || ta 1.45] + By [by Toby fuiBy Jou Vide tie Bp {Mn 
- | = 0 
Van 1 in| dy [la 1 tz| + Rz |ta 1 tz] + By [ta 1 tz | + Rz | "x 
tiq uo (a 1 14 ta 4 tape m, 6, 196, Le NN 
| Am Zip | 7 ; || a z|* By | a z | y | a z | 2 | 2 20 
  
  
. dy |i ta Th + Be is 1 52] Sy |*a 1 tz | + Re | My 
e 
3.4 - CHARACTERISTICS OF THE COMPUTATICN PROGRAM. 
The program of computation of the space resection made for the pano 
ramic photogram has the following characteristics: 
  
CO 
th 
kn 
It 
to, 
pu 
thi