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the Mitsubishi Dock, measurement of marine model propeller cavitation in 
hull pressure and so on. 
In industrial photogrammetry, precise measurement is sometimes 
important for design construction with severe criteria. This is combined 
with the stereo-camera, comparator, computer and so on and the problems 
in this case are the distribution and number of control points. Size and 
marking of control points, geodetic measurement of control points, position 
and direction of stereo-camera and its selection, transformation and adjust- 
ment of control and the check of physical condition of camera and plates, 
and especially the mathematical formulas for checking the control points 
are the key factor for this measurement. The inner orientation factors 
have an important effect upon the result. These must be consider in 
synthetic ways. 
After Helsinki Congress, we've proceeded the more systematized 
program on the way of analyzing the data gained by the analytical terres- 
trial photogrammetry. In the calculation of the analytical photogrammetry, 
the theory of the projection geometry must be severely considered including 
the various kinds of camera errors. 
The conventional method only uses the inner orientation data 
given from factory. As far as the terrestrial photogrammetry is concerned, 
photo-taking conditions are always changeable, for example the plate has 
nôt been kept in the same position because of invariable pressure force, 
that means, the camera has always variable inner orientation data.  There- 
fore we must adjust always these data to accommodate the precise central 
projection geoemetry. The more difficult things in the process of analy- 
tical photogrammetry is the fact that objects are always in the deep range. 
From the point of optical and mathematical geometry, the real correct 
focussed range must be checked and examined. 
As the fundamental formula, we consider the following principle: 
I (Cos a - Cos B) minimum 
i,j 
herewith o : incoming angle through the lens 
8 : outgoing angle through the lens 
and in the case of the least square method solution, the following coef- 
ficient determinant formula must be considered. 
ax. Aj A, Aj dx 
dy ol * Au As Ag dy 
dz 6 A; Ag Ao df 
and the important point in the short-range photogrammetry is that all con- 
trol points must be arranged to be situated not only in the plane (X,Z) but 
also in depth direction ( Y ) that means three-dimensionally. The above- 
mentioned program is considered very precisely for each plate and as the 
numerical model is formulated in the sytematized way, the most reliable 
data can be gotten.