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Safi 1996
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n Safi as viewed from the northwest looking to the southeast.
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Safi 1996 n The “Map”. n The POST. n And the Total Field Station.
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Safi 1996 n The “Map”. n The POST. n And the Total Field Station.
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Safi 1996 n POST to 287N measured.
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Safi 1996 n 287N to POST. n 986.1550m or 0.6128mi
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Safi 1996 n Angle 287N-POST- 289N measured.
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Safi 1996 n 289N to POST. n Distance?
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Safi 1996 n POST to B measured. n Angle B-POST- 289N measured. n POST to 289N missing
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Safi 1996 n 289N to 287N computed from British survey map coordinates. n Distance is 1842.77m or 1.1450mi.
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Safi 1996 Law of cosines: Law of sines:
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Safi 1996 n Trig supplies remaining sides and angles. n 289N to POST distance is 1314.9738m or 0.8171mi.
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Safi 1996 n POST is at intersection of circles. n (135610.32, 123322.23)
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Safi 1996 n A little more trig gives the location of B and the orientation of the segment POST-B.
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Safi 1997 n Remeasured in 1997. n POST to 289N was 1317.3132m. n POST to 287N was 986.1419m.
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Safi 1997 n 287N to 289N – -2.0292m/1842.77m – -1.1012m/km – -69.7703in/mile – 0.11% error n POST to 287N – 1.32cm/986.1550m – 1.3385cm/km – 0.85in/mile – 0.0013% error
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