TM 5-6675-322-14
g. Compute elevation.
When numerical value and sign of differential parallax
have been determined, height above or below datum may be computed:
Where:
h
= Difference in elevation between datum plane and point in
f e e t .
H = Absolute altitude in feet.
= D i f f e r e n t i a l p a r a l l a x i n m i l l i m e t e r s ( t o n e a r e s t 0 . 0 1 m m ) .
b = Distance between principal points of photographs
meters.
h . C o m p u t e r e l a t i v e e l e v a t i o n.
Small changes in elevation from one poi
another point may be computed using the following formula:
i n m i l l i -
n t t o
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