A Treatise On Levelling Topography And Higher Surveying
The book A Treatise On Levelling Topography And Higher Surveying was written by author W M William Mitchell Gillespie Here you can read free online of A Treatise On Levelling Topography And Higher Surveying book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Treatise On Levelling Topography And Higher Surveying a good or bad book?
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By making a map with contour-lines, and shaded obliquely, it will be both effective and precise. 7 Digitized by Google 98 LEVELLING, TOPOGRAPHY, AND fflGHER SURVEYING. CHAPTER IV. CONVENTIONAL 8IGN8. (166.) SignB for Hatnral Surfstce. Scmd is represented by fine dots made with the point of the pen ; gramd^ by coarser dots. Rocks are drawn in their proper places, in irregular angular forms, imitating their true appearance as seen from above. The nature of the rocks, or the geology of the country..., may be shown by applying the proper colors, as agreed on by geologists, to the back of the map, so that they may be seen by holding it up against the light, while they will thus not confuse the usual details. (167.) Signs for Vegetation. Woods are represented by scol- loped circles, irregularly disposed, imitating trees seen " in plan," and closer or farther apart jf^^ ^>^ ^3^ according to the thickness of the ^^i^^M ^ ^^ forest. It is usual to shade their ^^ cMfm^^^^^^ lower and right-hand sides, and to
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