Hi all,

the method Fred Sawyer suggested to determine the geographical longitude and latitude of a place is called the Two-Altitudes-Problem by C. F. Gauss (1777-1855).

This method can also be used to determine the declination and inclination of a dial plate which I described in the NASS Compendium 8-2, June 2001, p. 4 and following.

Rolf Wieland


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