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 315
de of it may be taken forthe base XY. Very acute or obtuse intersections should beavoided. 30° and 150° should be the extreme Umits. The impos-sibility of always doing this, renders this method often deficient inprecision. ^Mien the paper is filled, put on a new sheet, by fixingon it two known… … section. It requires the measurement of only one distance, but allthe points must be accessible. Let AB be the measured distance.Lay it off on the paper as ah. Set the table up at B, and turn ittill the line ba on the paper coincides with BA on the ground, asin the Method of Progression. Then sight…
Surveying
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