A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 442
s would be shown by only two lines, or one, according to CONVENTIONAL SIGNS. 427 Fig. 469. their magnitude. Ponds may be drawn like sea-shores, or repre-sented by parallel horizontal lines ruled across them. Marshes andswamps are represented by an irregular in-termingling of the preceding sign with… … 649. Colored Topography. The conven-tional signs which have been described, asmade with the pen, require much time andlabor. Colors are generally used by theFrench as substitutes for them, and combine the advantages ofgreat rapidity and effectiveness. Only three colors (besides In-dian-ink) are…
Surveying
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