A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)
Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 297
(429) To find the distance from a given point to an inacces-sible line. In Fig. 275, Art. (406), the required distance isCE. The operations therein directed give the line CA and theangle CAB or CAE. The required distance CE = CA . sin. CAE. 19 290 OBSTACLES IN ANGULAR SURVEYING. [pakt vn … C. When both ends op the line are inaccessible. (430) General Method. Let f^s- 292. A.B be the inaccessible line.Measure any convenient distanceCD, and the angles ACD, BCD,ADC, BDC. Then, in the triangle CDA,two angles and the included sideare given, to find CA. In thetriangle CDB, two angles and…
Surveying
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
