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 241
= 3) A = ^(K+ iK + IK + K), Simpsons f Rule. 2d\V.N=A, A = ^7 (*. + *0 + 32 (*, + A.) + ia«. V. N = 6, ^ = ]£ [A. + ^2 + <&,+ /&,+ 5 (K+ A.+ *.)+*,]. This is called Weddels Rule. If a quadrant be computed by this rule, the result is 0.779^ instead of 0.785^, the true value. When an area,… … nates of these partial areas be measured, then if d = commonwidth of the partial areas and kx, h„ k3, etc., their middle ordi-nates, a the first end ordinate and b the last one, we have,approximately, I. A = d2h, where 2/i signifies the summation of all the Its.The following rules are, however,…
Surveying
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