Restoration of Lost Corners by Proportionate Measurement

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Section 2 - Review Exercise

1. Many grants and reservations are irregular in shape because: a. they were established prior to public land subdivisional surveys and may also follow topographic features. b. There are numerous lost corners. c. some were so large, the convergence of meridians caused the north boundary to be shorter than the south boundary.	2. If the total record course is found to be 3° to the left of the true, how much change could be applied to individual courses, and in what direction? a. 3°/n and to the right b. 3° to the left c. n/3° and to the right d. 3° to the right
3. Grant boundaries should maintain "shape conformity." This means that all interior angles should: a. Have an index correction applied. b. Remain the same. c. Be adjusted to agree with your retracement.	4. If a retracement finds that the actual distance between two identified points is 2 percent shorter than the record distance, what should be done to all record distances for courses between those identified points? a. They should be lengthened by 2 percent. b. They should be left unchanged. c. They should be shortened by 2 percent.
5. The previous question dealt with a change in scale. Briefly, what does this mean? a. All lines are increased or decreased in length, proportionately. b. A mapping angle is used to adjust record data. c. The lengths of lines are adjusted to fit the record.	6. If the position of a natural object of topography is mentioned in the field notes, but its position differs from your proportionate resurvey, which position would be given precedence? a. Your proportionate position. b. The natural feature
7. When a series of record courses is run, the line between your starting point and the end point is called: a. the closing error b. the irregular boundary error c. the record connecting line. d. the connecting bearing	8. What would you call a line between your starting point and the identified original? a. Tie b. The control connecting line. c. The control record line.
9. Below are shown the record and retracement of a portion of a grant boundary. Using the concepts stated above, compute the true bearings and distances of the proportionate courses. Course 1 a. N 1° 43' W 40.53 b. N 1° 05' E 40.25 c. N 1° 08' E 40.65 Course 2 a. N 30° 35' W 41.47 b. N 32° 05' W 41.95 c. N 30° 43' W 41.52