The actual. character of a specific control point with respect to its 
absolute, partial or relative value is of no concern in setting up the corre- 
sponding observational equations. In case any control coordinates are given, 
it is only necessary to eliminate the corresponding parameter corrections in 
TS Absolute terms 
Gs 
= 
the By- matrix. Therefore, no coordinate corrections appear for the absolute 
il 
Jd 
7 
control points Nos. l, 7 and 9, the partial control point 3 appears only with 
one, and the partial control point 8 with only two coordinate corrections. 
The system of corresponding normal equations formed according to formula 
(51) is presented in Figure T. | 
  
V. A REFERENCE FOR AN AUXILIARY 
COORDINATE TRANSFORMATION 
The subject of & specific coordinate transformation is not necessarily 
connected with the subject of this report. However, the application of photo- 
grammetry, especially for geodetic purposes, unavoidably confronts the user 
with the problem of converting geodetic ellipsoidal coordinates (latitude 9, 
  
: 
I 
L 
longitude A, and elevation H, as referred to an ellipsoid of revolution) into 
a system of arbitrarily orlented Cartesian coordinates and vice versa. 
A solution for this problem is given in [7] under the title "Some Remarks 
on the Problem of Transforming Geodetic Ellipsoidal Coordinates into Cartesian 
Coordinates with the Help of the Reduced Latitude". Obviously, such a solution 
includes the establishment of a geocentric Cartesian system, which is but & 
special. case of the general coordinate transformation problem. 
VI. DETERMINATION OF RADIAL DISTORTION 
Distortion A is positive if the image point is displaced away from the 
prineipal point. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
tX1 
E v y nn R 
| ax 
Dmm nde en o elt 
Ay 
b 
X X 
yp P N m 
X : 
P | 
Figure. 8 Ig Figure 9