A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 323
he rod being grad- Fio. 4S8. t<^ O to uated to true units.If the interval kbe divided into thesame number ofunits as there werehundreds of units inB, each unit inter-cepted will for anyreading representone hundred units,and the formulasmay be writtenAB = Ilcos.2e+(/+c)cos. e [11.] BD = R^sin.… … REDUCTION OF STADIA NOTES. 313 from taking M L = E C cos. e—that is, assuming E M D and D L Cboth right angles. The correct expression is developed as fol-lows: Let m — I the visual angle, assuming wires equidistant.Then the angle HCD = 90 + e — w HMD = 90-m = HLDMED=:90 — e-??iD 0 L =90-e + mM H L…
Surveying
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