Page 91 - Introduction to Mineral Exploration

74 C.J. MOON & M.K.G. WHATELEY

A B C D E A′

10,000 10,045.53 10,109.97 10,128.53 10,029.11 10,000.00

N
Final coords 10,000 10,069.76 10,035.49 9948.46 9964.54 10,000.00 1 +ve +ve +ve −ve 2

E
sin cos sin cos
10,045.76
10,110.58
10,001.54
10,030.47
10,129.50
N
Unadjusted coords N E 10,000 10,000 10,067.98 10,032.10 9943.09 9957.01 9991.48 +1.54 −8.52 Quadrants 4 −ve sin +ve cos −ve sin −ve cos 3

±D.cosØ +45.8538 +64.7219 +18.9200 −99.0268 −28.9254
An example of balancing a closed traverse. (Modified from Reedman 1979.)
∆N

±D.sinØ +67.9811 −35.8759 −89.0114 +13.9173 +34.4720

∆E

±cosØ +0.5592 +0.8746 +0.2079 −0.9903 −0.6428 3.39 3.39 = 5.37 5.37 = 7.54 8.52

±sinØ +0.8290 −0.4848 −0.9781 +0.1392 +0.7660 1.78 1.78 = 1.61 + 1.98 + 2.17 + 7.54 = 0.98 +

= B C = D = E =
Distance (D) m 82 74 91 100 45 392 8.52 = × 8.52 + × 8.52 + × 8.52 + × 8.52 + ×

Quadrant 1 4 4 2 2 82/392 74/392 91/392 100/392 45/392

Bearing Ø 56 331 282 172 130 Corrections for Eastings

TABLE 5.1 Line AB BC CD DE EA TOTAL Correction for B Correction for C Correction for D Correction for E Correction for A