Military sketching and map reading; including panoramic sketching and aerial photography (1921)
Grieves, Loren Chester, 1878- · Washington : United States Infantry Association · leaf 48
oo o o ■^CM <M 4) o □1 Visibility 45 … o o o V o O n est CM T- 4) - a reu > IL v> 46 Military Sketching and Map Reading perpendiculars to the line ABC, and we find, of the lineABC, that AXj, YB, and ZC are visible portions. Visibility of Areas From the point of observation, draw several radiatinglines through the critical points…
Maps, Military · Military sketching
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![An illustration from Histoire de mes ascensions : récit de vingt-quatre voyages aériens [1868-1877] (1880)](https://img.insideoutlibrary.com/img/200/ia-39002011210615.med.yale.edu-279-22.webp)