Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 83
s it is higher than 558(shown as 931). Upon examining the map we; find that thereis a hill^between having an elevation of 712, hence furtherstudy is necessary to answer the question. Fig. 35 shows a profile drawn on the line from Wirts toChestnut Hill. If we draw a line of sight on the profile… … Fig. 35.—Intervisibility. for us to plot a complete profile to answer this question. Allwe need to plot are A, B, and C. Instead of answering the problem by a graphical solutionas above we can easily work it out mathematically. Thus wefind that the distance from Wirts (A) to Hill 712 (C) is…
Cartography · Military maps
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