Elements of surveying and navigation : with a description of the instruments and the necessary tables (1847)
Davies, Charles, 1798-1876 · New York : A.S. Barnes & Co. · leaf 83
points D, B and A,shall be in the same right line,as also, the points E, C and A;then rrieasure the diagonal lines DC and EB. Now, in the triangle BEC, the three sides are known,therefore, the angle ECB can be found. In the triangleCDB, the three sides are also known, therefore the angleCBD can be… … PROBLEM IV. To find the altitude of an object, when the distance to thevertical line passing through the top of it is known. 102. Let CD be the alti-tude required, and AC theknown distance. From A, measure on the line AC, any convenient ^i ,.■
Surveying · Navigation
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