What Is The Formula Used In Chain Survey To Find The True Length Of Line Complete Guide

what is the formula used in chain survey to find the true length of line. Where TVD2 new true vertical depth ft TVD1 last true vertical depth ft CL course length number of feet since last survey cos cosine. C v 2 L s i n 2 A 2displaystyle C_ v2Lsin 2 frac A 2 When distances are measured along the slope the equivalent horizontal distance may be determined by applying a slope correction.

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All returns of measurement in the rectangular system are made in the true horizontal distance in links chains and miles. Easily confused with arc length. Now true length of a line L L x its measured length.

TVD2 cos 40 x 30 ft 8500 ft TVD2 0766 x 30 ft 8500 ft TVD2 2298 ft 8500 ft TVD2 8522.

It was subsequently found that the chain was 004m too long. Three orthographic views in firstangle projection are given in Fig. Where CA Correction for absolute length. True length of the line 3000708 30 x 459242 459350 m.