A system of geometry and trigonometry : with a treatise on surveying (1830)
Flint, Abel, 1765-1825, Gillet, George, Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Hartford : Cooke & Co. · leaf 114
have been re-markable differences ; that in different parts of the world, the degreesvary in length, increasing always from the equator to the poles ; andthat a very trifling variation in smaller measures, as a foot, or yard,may become very perceptible in a distance of 60 or 70 miles, the… … -A* the size of yourThrough b, the TO CHANGE A MAP FROM ONE SCALE TO ANOTHER.* Fig. 4. *, Suppose the map to beABCD. It is desired todraw a larger map of the ,- same field, without thenecessity of plotting a-gain. Take any pointwithin the field, as E.From this point draw linesof indefinite length…
Surveying · Geometry · Trigonometry
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