The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 238
eys, especially where thestadia is used, see Chapter VIII. THE AREAS OF FIGURES BOUNDED BY CURVED OR IRREGULAR LINES. 182. The Method by Offsets at Irregular Intervals. —Where a tract of land is bounded by a body of water, as astream or lake, it is customary to run straight lines as near… … Fig. 59. the distance along the base-line being the altitude and the half-sum of the adjacent offsets being the mean width. The offsetsshould therefore be run at such intervals as to make thismethod of computation sufficiently accurate. Such offsetswere taken from the course GH in Fig. 54, the…
Surveying
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