- The coordinates of points in newly formed models are 
treated as photogrammetric observation, while the unknown 
paremeters as parameters of photogrammetric models; 
- The number of unknown orientation parameters in every 
newly formed model must be smaller than the number of 
observations i that particular model. 
In figures 1.-6. indipendent coordínate systems are defined 
for the greatest number of geodetic observations and 
geometric information about the object. For each of these 
cases and for their possible variations in table 1. "are 
shown the number and type of unknown orientation parameters 
as well as the number of observation equations. 
Due to a decreased number of free parameters of particular 
newly formed models, the rotation angle becomes a non-li- 
near value. For that reason all unknown values in table l. 
are shown as differentials, under the hypothesis of knowing 
the corresponding approximate values. The approximate 
values of the unknowns are most easily arrived at by use of 
approximate coordinates of points after first iteration of 
classical block adjustment. These coordinates are also 
essential for determination of approximate scale factor in 
the newly formed models in which there were not measured 
horisontal distances. 
4. OBSERVATION EQUATIONS 
By decreasing the number of free parameters of certain 
newly formed models in respect to the most prevalent ones 
(4 in the plan and 3 in the height adjustment) the functio- 
nal relationship between the coordinate system of the 
models and objects is changed as well as the appearance of 
equation observation. 
Accordingly, for models which in plan adjustment retained 4 
free parameters, same observation equations will be appli- 
cable as in the classical adjustment: 
dX 
Vy A ma YY ay? X 
= . a o — 
Vy 0.448. XY! x! b X +. (1) 
13 11 j i 
For models with denied rotation the observation equations 
are as follows: 
Vx i :0 :4' dX X 
= . dY -. vee (2) 
Ve o Tp y 1484 Y. 
1j 1j i i 
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