Self Study: Least Squares
Level Circuit Adjustment
Given the level circuit below, what are the adjusted elevations and their expected errors for points A and B? Compute to both to 0.001 ft.
| Obs | dElev (ft) | Len* (ft) | Obs | dElev (ft) | Len* (ft) | |
| 1 | +3.28 | 625 | 4 | -2.48 | 1100 | |
| 2 | -11.81 | 800 | 5 | -11.85 | 750 | |
| 3 | +14.51 | 550 | 6 | +8.58 | 375 |
*Len is the sum of the backsight and foresite distances for the observation run.
Solution