A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 369
the curved hachures with a pencil at some distance apart as guides.When the contours are very far apart, as on nearly level ground,pencil in intermediate ones. Hachures in adjoining rows should not be continuous, but break joints, to indicate the places of the contour lines, which areusually… … BRUSH HILL SHADINO. 359 without contour lines to guidethem, take care never to let tworows run into one; for the breaksbetween the rows represent con-tour lines, and two contour linesof different heights can nevermeet, except on a vertical surface. In drawing a hill begin at thetop. When hachures…
Surveying
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