: f 
compensation Ab, : Af = -— Ab, is i ; ; 
Cy 8 f 5 80, introduced in like manner as in the former 
Supposing: that the elements of orientation are taken. so exactly as under 
par.l, the amounts of left deformations are equal.too. Because of a smaller 
cision of rectification we practicaly calculate.only with greater tie 
In order to reduce the influence of the left errors do! dy! and de] we c gs 
introduce the conditions of partial compensation d% = - Fd] sd b Ti 
9 25 
dy, = fdw! and.dy, = fu,. In this way the.most influent] 
nd. tluential terms of the fire 
order are eliminated out of the deformational equations. In this case e Fir tra 
des, doi and dw! ‘resp. correspondin ; : : 
iod. 1 Pp p & corrections are to. be defined by a special 
3. Approximate .Orientation of Unractif ied Phetographs 
Let us think that the elements i1, 2, €, and w2 are known e.g. from 
the preceding aereal triangulation. By the use of stereosketchmaster we intro- 
duce the conditions of partial compensation dx,, dx, dy, and dye. We orienta- 
te the photographs .on the principal nuclear ray. In order to reduce the influ- 
ence of the element Ab, we introduce the corresponding Af. The amounts of the 
first order terms of deformational equations are considerable reduced. Still the 
elements 1, Va, We, We, the rest of Ab, and df are contained in equations. 
Because of a great amount of the element df at the inner orientation and cause 
of the influence of the elements ©, and @, at the external one the correspon- 
ding terms of the second order can even reach milimeter-amounts that aren:t com- 
pensated. Z 
1 
If the instrument makes 7 
possible the inclination of both 
photo-plains in the longitudinal 
and transverse direction, the 
circumstances become better(Fig.). 
We. bend photographs for 
the corresponding inclines Vs, 
$9, Ww; and wp. and correct the ; : 
photo-distances (Adf, and Adf2) FHg.8 / 
cause of discentralization of the 
principal points O, and Q,. 
At instruments with a constant image-distan- 
   
ce we can reach that the elements of the tilt (9,0) S 
and the photograph move at the same time for the A 
corresponding amounts dx, dy and Adf (Fig.9).The 7 
support of photograph moves on the separately for- de 
med guidances with the radius R - f. The exceniri- =z end 
cal displacement comes to dx = - f® the. differen VE 
Ce in height between the principal point O and the ar] 
nadir N to Adf = d 9%. The;circumstances. in Fig? 
thé rectangular direction (y) for the jransverse 
incline w are the same. This solution is use : : p^ ei. 
x . . * FIAT ~ 3 nh a, S SS 1 
With the American Multiscope. The relative orientation ©" photograph is po 
ble on it aslike as on Stereoflex. 
all mentioned elements exactly, 
es of the first example. 
the left deformations 
If we consider 
are the same as those on