- The x axes of the two theodolite images, = The translation element along the Y direc- 
which are parallel to the base line, are tion By has a zero value. 
parallel. 
The fifth element of the relative orientation 
- The z axes of the two theodolite images, parameter, which is the difference of the 
which are parallel to the theodolite ver- height between the two perspective centers of 
tical axes at the two theodolite stations, the theodolite images Bz can be determined 
are parallel. either directly by using linear measurements 
or indirectly by using the coplanarity  equ- 
- The two theodolite images are on one ver- tion. The indirect method is not used for the 
tical plane. following reasons: 
Accordingly, the relative orientation para- - The perspective center, which is the point 
meters which are required to orient the right of intersection the theodolite vertical 
theodolite image with respect to the left one, and horizontal axes, is not well defined 
are having these values. point. 
* - The three rotation parameters around the - Even if it was defined the value of Bz 
three images axes are having zero values. measured by linear measurements would not 
give the required accuracy. 
TABLE 1 
THEODOLITE DIRECTIONS AND THEODOLITE IMAGE COORDINATES 
FROM THE LEFT STATION 
  
  
  
  
Theodolite Directions Theodolite Image 
a B X y 
101| 39 19 07 -00 42 07 7.2—-17 -1.2284 
103 | 43 22 03 -00 41 51 14.3434 -1.2299 
105 | 45 57 14 -00 40 10 18.9836 -1.1893 
107 | 48 34 00 -00 41 49 23.7527 -1.2503 
* 109] 52 19 20 -00 41 15 30.7969 -1.2558 
1001 | 39 20 24 34 46 13 7.2295 69.6061 
1003 | 43 20 02 34 33 16 14.2836 69.5671 
1005 | 45 59 11 34 27 08 19.0421 69.5772 
+ 1007 | 48 31 11 34 07 19 23.6661 69.6320 
1009| 52 22 02 34 36 46 30.8829 69.5690 
3001 | 39 22 04 64 37 06 7.2782 211.3310 
3003] 43 21 49 64 26 58 14.3365 211.3179 
3005] 45 59 32 | 64 15 wo 19.0529| 211.1556 
3007 | 48 33 50 64 04 00 23.7475 211.3562 
3009 | 52 21 05 64 37 45 30.8527 211.0883 
a, 125 12 
  
  
  
  
  
  
  
  
  
112