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Restoration of Lost Corners by Proportionate Measurement
 
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  Section 2A - Review Exercise

1. In the diagram, which known corners would control the position of the lost corner “A”?
Choice 1 a. 3, B, 1, and 6
Choice 2 b. 1 and 5
Choice 2 c. 1, 5, 3, and C
Choice 2 d. 1, 4, 5, and 3
2. What would this method be called?
Choice 1 a. Two Point Control
Choice 2 b. Double Proportion
Choice 3 c. Two way Proportion
3. If "A" had been restored, which corner should be the next focus of proportional search or restoration?
Choice 1 a. B
Choice 2 b. F
Choice 3 c. C
4. In the diagram, what method and corners would be used to restore corner B?
Choice 1 a. 2, 3, and 4 Three Way Control
Choice 2 b. 3 and 4 Single Proportion
Choice 2 c. A and C Single Proportion
5. What would you apply if an original surveyor had chained "long" and to the "right of true"?
Choice 1 a. Record Error
Choice 2 b. Record Correction
Choice 2 c. Index Correction for average error
 
6. In this problem, we have retraced a line using record data and placed a temp. The original surveyor averaged 0.49 chains "long" on each mile he ran, and also was O1° 12' to the right of his stated bearings, as proven by many miles of retracement of his work. To reflect these average errors, what would our adjusted bearing and distance be? What would the moves be from temp.? -- This three part question is worth 36 pts.

Bearing
Choice 1 a. N 87° 45' W
Choice 2 b. S 89° 51' W
Choice 3 c. N 88° 45' W

Distance
Choice 4 a. 41.785
Choice 4 b. 41 995
Choice 4 c. 41.895

Move
Choice 4 a. N 0.882, W 0.230
Choice 4 b. N 0.828, W 0.233
Choice 4 c. S 0.887, W 0.224

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