A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 73
step* yf^^Ww A tie-line may also be employed as a proof- \S2~^^/ line, in the place of a diagonal, and tested inC the same manner. 58 LAND-SUB YEYim. If any angle of the field is re-entering, as at B in the figure,measure a tie-line across the salient angle ABC. 89. Chain-Angles. It is convenient,… … 90. Inaccessible Areas. The method of tie-lines can be appliedto measuring fields which can not be entered. Thus, in the figure, ABCD is an inaccessible wooded field, offour sides. To survey it, measure all thesides, and at any corner, as D, measureany distance D E, in the line of A Dproduced.…
Surveying
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