This enumeration contains general purpose compass directions.
Values:
| IG_COMPASS_N | North. |
| IG_COMPASS_NE | North-East. |
| IG_COMPASS_E | East. |
| IG_COMPASS_SE | South-East. |
| IG_COMPASS_S | South. |
| IG_COMPASS_SW | South-West. |
| IG_COMPASS_W | West. |
| IG_COMPASS_NW | North-West. |