The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 240
hichare given on p. 183. The work of computation may be shortened by using amodified form of the methodof areas from the rectangularcoordinates of the corners,which, in this case, are the endsof the offset lines. Let Fig.59 be an area to be determinedfrom the offsets from the lineAK. The position… … Fig. 59. + ^difc - ye) + ^e iya -yf)+ ^f{ye-yg) + ^g {yf -yh) + ^h (yg - yk) + ^Jc {yh -ya)]- (i) But here Xa, x^, ya, and f^ are all zero ; also x^ = Xj^, hencethis eauation becomes ^ = i [^c{yb -yd) -f ^d{yc - ye) + ^e {ya -yf) +^f{ye-yg)+^g{yf-yh)+ ^h{yg+yh)l{2) From eq. (2) we have the * The…
Surveying
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