Refactor area boundary sides retrieval with _geographic_sides and _projection_sides methods
#675
| Job | Run time |
|---|---|
| 27s | |
| 8m 41s | |
| 11m 13s | |
| 25m 44s | |
| 3m 31s | |
| 27s | |
| 0s | |
| 50m 3s |