46 
After substitution of the expression (152)— (159) we find the influence 
  
  
of the errors of the elements of the relative orientation upon the coordi- 
nates of the transfer points 
das = — dd», -- Ado, (160) 
1 b? + 2 d? d? 
dy, = > (dby,, — dby,, n + - 25 ds S data. — 
d (b? + 2h?)d hd 
9% (dbz, T d- dbz.) + = > bh dq l1 EN > “dg 2; T 
h? — d? d? + h? 
d 25 dos. Ps oi “ds, (161) 
da, — dd x; + hd, (162) 
1 b? + 2 d? d? 
dy; == $ (dbys, — dbys, )-r 2b dts, nen dy, + 
d (d? + 27?) d hd 
—— z - > —— Y? Har - ) - 
+ > (dbz, + dbz,) + 2» dq Ai 5 dps, + 
h? — d? d? + h? | 
+ — 2 7 do. 2 7 das, (163) 
For the transfer points 3 and 5 of the model i, + 1 we have from 
  
(17) and (18) 
d, — day; — ddx,;,, 
d 
dys = dy, + > db; ; +1 
(164) 
dx; = day; + dda; ; 41 
d 
dys = dyo, — y db, i. 
Ne, 
The errors of the setting of the floating mark in the model points 
(the pointing error) must also be taken into account, however. These 
errors are here denoted dx, and dy, and are assumed to be of equal