A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 367
in accordance with the scale, placing thewidth of the hachure always in the same direction from the ver-tical lines. From 0 toward the left and from N toward the rightthe spaces for the five hachures are to be increased in regular orderby 25, 50, 75, and 100 per cent. A scale giving more hachures… … put in. Draw A B and A C (Fig. 525) perpendicular to each other.Draw through A lines making angles of 5°, 10°, 15° to 45° withAB; lay off A^r equal to the contour interval to the scale of themap ; draw gf parallel to A B; cut off the paper along the line gf;by placing the point g in coincidence…
Surveying
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