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To take a survey of a piece of ground from any point within it, from where all the angles can be seen; by the Chain only

[polygon with numbered points] [following information is in a table] No Std. Radii Ch. Links Distance Ch. Links 1 20.00 17.65 2 21.78 18.50 3 21.74 28.00 4 25.34 20.00 5 17.20 14.83 6 29.68 19.41 7 21.20 24.53