الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Stereoscopy, or solid vision, is the term given to the following natural phenomenon, when a person looks simultaneously at two photographs which have been taken of the same scene from two viewpoints, viewing one photograph with each eye, he can see an image of the scene in three dimension.
The term parallax is applied to the movement of the image of one stationary object with respect to the image of another stationary of object when the eye is moved sideways.The aerial camera does not take a continuous picture movemant of any two points must have taken place parallel with the flight line.
If a pair of overlapping photographs are truely vertical, if each of the two photographs has been taken from exactly the same flying hight and if the photographs and the stoeroscop are oriented in proper way, thus the person with normal binocular vision should see a clear storeoscopic image throughout the area of overlap or the two photographs.
Under practical conditions, several factors affecting the photography and the orientation will tend to make stereocopic vision quite difficult, if not impossible these factors are :
unequal flying height, photographic till, misalignment of the flight line, misalignment of the stereoscope, great difference in parallax between adjacent images.
This thesis handels an invistigation for the second factors, which is the till of the photographs its fluense allover the phdograph points.
The investigations are carried over in three ground case; flat terrain model, inclined terrain in direction of flight line, incliued terrain in the opposite direcdtion to case2, inclined terrain in direction perpenicular to F.L such that points 1 of axis 1.2.4 are higher than points 25 of the same axis, in case of clined in opposite direction of case 4.