Stuart, Edwin Roy, 1874- · New York, McGraw-Hill · leaf 132
(/) (2) Fig. 39.—Sketching from a Point. point marked by characteristic ground forms. Such a point isrepresented at a. With the board set up and oriented at a, elevation 435 feet,inspection shows that there is a spur running in the direction of b,the crest of which is sharp, and that it changes…
Military sketching · Maps, Military
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