Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 130
ion method,as it is not necessary to select the next set-up before leaving THREE POINT METHOD 109 a station. The mapper can pick up his board and move overthe area until he finds a desirable position for the instrument.The board can be set up in this new position, oriented and thepoint of set-up… … Fig. 61.—The Three Point Method. ing paper method, Fig. 61. A piece of tracing paper is placedon the board and held down with tacks. A point G is selectedin the center of the paper and rays are drawn from this pointin the direction of the three above-mentioned objects in thefield, C, D, and E. The…
Cartography · Military maps
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