A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 118
e, I measured on levelground a base line AB 252.28 feetlong, and took the following angles:At A, the angle of position of C fromB was = 82° 54 30, and of D fromB = 89° 24; the elevation of thebase of C = 3° 45; of top of do. =9° 25; of the base of D = 3° 54;of top of do. = 10° 29 30. At B,the angle… … 116 PLANE TRIGONOMETRY. [Chap. in. 10° 7 30. Eequirecl the heights of the trees, and the dis-tance between their bases. Ans. Height of C = 89.37 ft.; of D = 103.37 ft.; dis-tance, 1.00.7 ft. With the angles of verification ; height ofC = 103.29 ft.; of D = 89.36 ft. Fig. 77. Problem 13.—One side EF…
Surveying
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