Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 121
n. Note that the mapper must select the set-up points A, B,etc. These points should generally be taken as far apart aspossible and at the principal bends in the road which can besketched in freehand between them. Short sights are to beavoided in traversing with the sketch board, as they… … Fig. 57.—Method of Sighting for Points Much above or below Level of Board. which can be stuck in the ground at the last and next set up,to use in temporarily marking them as well as in sighting.Also in sighting do hot stand close up to the alidade, but afew feet in back of it, as a better sight can…
Cartography · Military maps
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