Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 158
le between objects one yardapart and distant one thousand yards from the observer isone mil. A mil represents an angle of about 3J, but being aratio (the ratio of the base of a triangle to its altitude) anumber of calculations are simplified,* or can be solved approx- *See Danford and Moretti,… … distances can be easily found. For example the angle betweentwo points ten feet apart and one thousand feet distant is * See Moss, Manual of Military Training. 138 LANDSCAPE SKETCHING ten mils. If these points had been only 500 feet distantthe angle would have been twenty mils, because a ratio of…
Cartography · Military maps
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