Topographic maps and sketch mapping . uitable for pencil work. The former type has been discussedin Art. 3, Part I. Fig. 48 shows a very simple set of signs,which are practically those used on the war game maps pre-pared by the army schools at Fort Leavenworth. They arewell adapted for field sketching with the sketch case. 86 TOPOGRAPHIC DRAFTING The student should review Art. 3 on conventional signs,particularly as regards the number of signs and the cor-responding detail in its relation to the scale of the signs to supplement Fig. 48 should be taken fromthose adopted by the U.
Topographic maps and sketch mapping . uitable for pencil work. The former type has been discussedin Art. 3, Part I. Fig. 48 shows a very simple set of signs,which are practically those used on the war game maps pre-pared by the army schools at Fort Leavenworth. They arewell adapted for field sketching with the sketch case. 86 TOPOGRAPHIC DRAFTING The student should review Art. 3 on conventional signs,particularly as regards the number of signs and the cor-responding detail in its relation to the scale of the signs to supplement Fig. 48 should be taken fromthose adopted by the U. S. Geographic Board, which are prac-tically those of the U. S. G. S. Note that the size of each conventional sign depends on Pdads Oracled and not Country : Path or Trail. Pbilroads Single Track Double Street or Beam or Oirder. h/Wood Pile Buildings House ,. Barns and Ruins . Church Ch= Schoolhouse. .5H Station Sta Post PO ,,. ***** StreamsUnder 15 ft HideOverFordPitch Miscellaneous Telegraph line t Transmission- ? Embankment. Cutting Land Classification a a a Trees nithout underbrush Woods with underbrush (SI \SH 4 [_ + j All blank spaces are grass land Fig. 48.—Conventional Signs for Sketch Mapping. the scale used and at the same time seldom represents to scalethe object it symbolizes. Buildings are shown correct in sizeand shape. The two lines representing the sides of a road,however, are not shown their proper distance apart excepton very large scale maps—it would be impossible to draw twodistinct lines, say twenty feet apart, on a map having a scaleof one inch equals one mile, for example, while for a scale TOPOGRAPHIC DRAFTING 87 of one inch equalling one hundred feet this can be, and is,done. Tr
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcartogr, bookyear1920
