A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 364
breadth than those for the 40° slope, but showing the same widthof white between them. Fig. 522 is a hill drawn by Lehmanns method. Also, to distinguish slopes varying from 0° to 5°, an exception Fig. 521. f !■ 10° 20° 25 30 … was made to the rule given above, and the same map space whichfor a 5° slope is covered with 5 hachures, has but 4 hachures for a 354 TOPocRArnr. 4° slope, 3 for a 3° slope, etc. In Lehmanns standard workingscale the width of a hachure for a o° slope is specified at one ninthof a millimetre. From…
Surveying
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