Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 118
urement is then made betweenthese temporary stations. It is evident that the bearing and length ofinUf the ofiset-course, are the same as thoseof J/3\ When such offset-courses are necessary for severalsuccessive courses, errors are likely to be committed,unless the surveyor is careful to make new… … 0< Such offsets, in field surveys, may generally be measured bythe flag-staff, and the right angle may be determined withsufficient accuracy by the eye. It is, of course, immaterial, so far as accuracy is concerned,upon which side of the line the offset is taken, whether it beoutside or inside…
Surveying
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