Stuart, Edwin Roy, 1874- · New York, McGraw-Hill · leaf 79
file line where contours and streams cross it, andtransfer these points to the line on the paper on which the profileis to be drawn. On perpendiculars at these points set off, to thevertical scale selected, distances corresponding to the heights repre-sented by the contours, and mark also the… … Fig. 25.—Visibility of Points and Areas. The high points where the profile line crosses the crests ofspurs or ridges and the low points where it crosses the streamswill have to be determined in elevation by estimation, using thetheory that the slope is uniform between contours. Let us assumethat a…
Military sketching · Maps, Military
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