85
A mZ +m?
y n-50
150 +
100 4
50 4
Ti- 5
0 T T T T T T T >
n T n Ti 2n 3n Zn n
8 4 3 2 3 4 8
Diagram 19. Numerical stereo-radial triangulation. Radial standard errors. Bridging.
h
$y — = 1
c
The standard error of the elevations is then found as
(350)
Wp = So V@r, Rg
where s, is the standard error of the y-parallax measurements.
The expression (350) is graphically demonstrated for s, — 1 in the
diagram 18.