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 121
ke, F, at the intersection of EA and CD. AC ^C, AF and FE. Then is AB = -^ (FE—AF). (190) In a Town. Cases may occur,m the streets of a compactly bmlt town,in which it is impossible to measure alongany other luies than those of the streets.The figure represents such a case, inwhich is required the… … K^ CHAP, v.] Obstacles to Measurement. 115 ACxBC) As this expression is somewhat complicated, an example vnW bagiven: Let AC = 100, CE = 40, CD = 30, DE = 21, and CB= 80; then wiU AB = 51.7. B. WUEx\ OXE ElVD OF THE LINE IS INACCESSIBLE. (191) By perpendiculars. This principlemay be applied in a…
Surveying
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