Refactor area boundary sides retrieval with _geographic_sides and _projection_sides methods
#937
| Job | Run time |
|---|---|
| 5m 14s | |
| 5m 17s | |
| 5m 14s | |
| 5m 12s | |
| 5m 18s | |
| 5m 29s | |
| 5m 29s | |
| 5m 27s | |
| 5m 30s | |
| 5m 28s | |
| 0s | |
| 53m 38s |