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VERT1C.VL PROJELCTIOH
Sdrtryck ur Svensk Lantmateritidskrift nr 3 1964
The Influence of the Curvature of the
Earth upon Aerial Photographs
K. A. Ohlin ) VIAK Consulting Engineers, Vallingby
1 The magnitude of the curvature of the earth.
According to the theorem of Pythagoras’ we have:
f s 2 + (R + dH)2 = R2 (see fig. 1)
\ s 2 ' = x 2 + y 2 (see fig. 2)
From (1) and (2) we find:
x 2 + y 2