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K. Reduction Example: SPC
1. Preliminary Calculations
a. Survey Data
This chapter covers measurements reduction for an SPC conic zone. Distances and coordinates will be in survey feet.
The survey data and SPC grid information for point Jerry are summarized in Figure K-1 and Table K-1.
 |
| Figure K-1 Survey Data |
|
Table K-1
Orthometric Heights
|
|
| Point |
H, ft |
| Jerry |
1177 |
| A1 |
1805 |
| B7 |
1340 |
b. Approximate Coordinates
Compute approximate SPC coordinates of A1 and B7.
Point A1
Point B7
