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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 186

An illustration from 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, leaf 186
illfix the point 3. Join2....3 ; and so pro-ceed, setting offNorth Latitudesalong the INIeridian iupwards, and SouthLatitudes along itdownwards; EastDepartures perpen-dicularly to the right,and West Depar-tures perpendicularlj to the left. The advantages of this method are its rapidity, ease and… … CHAPTER VI. CALCULATING THE COIVTEINT. (2S6) Methods. When a field has been platted, by whatever method it may have been surveyed, its content can be obtainedfrom its plat by dividing it up into triangles, and measuring onthe plat their bases and perpendiculars; or by any of the othermeans…

Surveying

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