ference coordinates 
in the single stages, 
observed points L7 - 
.0 mm of remaining 
riori estimate by law 
quations: 
, (3) 
'a axes, 
e, 
grammetric base b, 
s. 
  
xes 
| metric camera UMK 
9 and œ’=46.59 there 
7=1.3mmandmy = 
-UATION 
observed points in 
> in tab.1..Graphical 
ock gate in separate 
od line - geodetic 
photogrammetric 
rizontal shift AY of 
"geodetic" minus 
s the true errors,are 
L7 - L13 and F7 - 
served points are the 
nent was considered 
a 1996 
as a standard.This is caused with worse measuring of 
photograph coordinates of observed points (contrast of 
targets) and no synchronization between geodetic and 
photogrammetric | measurements.Observed time of 
geodetic measurements in one stage is cca 30 min and for 
photogrammetric measurements is 1 - 10 second 
(exposure time). 
SHIFT [mm] 
  
  
  
TTT TTT TTT TTT TT TTT Y 
$ 10 15 20 25 30 38 40 
Figure 6 Graphical presentation of deformation 
The value of the true errors e is an accuracy estimate of 
the horizontal shifts AY.A priori accuracy of measurement 
of AY is given by the mean error m 
m=—s (4) 
whereby Ss is expected total horizontal shift of the lock 
gate in mm 
The expected maximum horizontal shift of observed 
points located on the centre of surface of the observed 
lock gate is 45 mm.According to the equation (4) is the 
mean error of measurement of AY, m = 3 mm.The 
horizontal uncertainty characterized by the mean error m, 
= 1.5 - 3 mm is sufficient for the determination of the 
displacements of observed points assumed by the project. 
The analytical photogrammetric method utilizing ORIENT 
software is the most convenient method for measuring 
spatial deformations of the observed points in short time 
intervals, as it was in the case of check measurements on 
the left lock gate of the Gabéíkovo waterworks.The given 
method can be used during full lock operation, what would 
enable regular monitoring of the lock safety parameters. 
7T. REFERENCES 
Barto$,P.,1994. Photogrammetric measurement of the 
geometric - hydrotechnical parameters of lock.Slovak 
journal of Civil engineering,volume ||, 1994/4,pp.12-22 
37 
Barto$,P. - Gregor,V. Photogrammetric measurement of 
the deformations of the Gabéikovo lock gate. Proccedings 
of the Optical 3-D Measurement Techniques lll, Vienna 
october 1995,pp.427-434. 
ORIENT,1991. A universal photogrammetric adjustment 
system - reference manual, Vienna,december 1995. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B5. Vienna 1996