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1 minute at 500 ft is 0.15 ft.?ÿ That was about the best that could be done with a compass, and most were not that self-consistent in their scales. The diurnal variation of the reading may exceed a minute.
The eye can judge the center of those monuments nearly that well even without marks.
https://www.compleatsurveyor.com/ColonialCompassAccuracy/ColonialCompassAccuracy.html
Posted : 16/02/2022 2:26 pm
