That is very elegant solution indeed. Many thanks
Quote:
Originally Posted by frolinmod
It's better to use the Solar transit method. It is more accurate than using a magnetic compass and you don't have to worry about magnetic deviation or the influence of things like the rebar cage inside your concrete pier that might throw the compass needle off.
Suspend a plumb bob from a string so that the shadow of the string falls across the top of your pier. Using your favorite planetarium program, look up the time when the Sun transits the meridian on the current date. At that exact time, mark a line where the shadow falls across the top of your pier. For good measure, mark it not just on the top, but on the sides as well. The line runs North-South and is very accurate.
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