autograph. It should to be taken according to the increase of the 
GJ - scale. Grad is the unit of measure of this element. 
longitudinal inclination of the air photograph; this 
angle should be measured in the vertical plane going through the 
nadir points of both photographs. This angle is also an oriented 
one, whose vertex is in 0 1# the initial arm coincides with the 
perpendicular to the line O^Og and the second arm forma the 
angle T• The positive direction of this angle is determined by 
the scales of the autograph. Grad is the unit of measure of this 
element. 
- the angle of swing of the air photograph; its vertex lies in the 
principal point of the picture. The angle lies in the picture pla 
ne, its initial arm is the intersection of the plaaeJT^ orjl 
parallel to the XOZ plane and going through the principal point 
of the photograph, the second arm is the xx axis of the picture. 
This is an oriented angle; its positive direction is this of the 
graduation of the ring holding the image carrier. Grad is the unit 
of measure of this element. 
1 - the angle equally connected with the longitudinal angle of indi 
as 
nation of the left and right camera of the autograph. It is an 
oriented angle; its vertex may be in the point 0, 0^ or 0 g ; this 
angle lies in the vertical plane going through the both nadir 
points of the stereogram. Its initial arm is the horizontal line 
and the second arm is the line 00 2 ; its. direction is given by the 
scala of the autograph and corresponds to the direction of scales 
of the left and right side of the autograph. 
5