Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge, University press · leaf 216
ve the triangle until it has been made into a perfecttriangle, whose angles add up toexactly 180°. If we are concernedwith this triangle alone, the bestthing that we can do is to divide upthe error into three equal parts andapply one to each of the angles, sothat the sum of the thus correctedangles… … Fig. 22. whence D Y= DE cosec D YE sin DE Y, and similarly EY=DE cosec DYE sm YDE. Thus either D Y or EY is easily found. Distributing the excess of 26 over the three angles we have for thecorrected values : Angle at D 55° 28 7 Y 31 57 20 ^ 92 34 33 180 o o 158 TOPOGRAPHICAL SURVEY Thus if log/?£■…
Maps · Surveying
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