The town layout you show is typical of about 80% of towns in that a bombing run to white flag it would require an approach from 8:00 (SW) towards a 2:00 (NE) egress, or vice versa. The remaining bases (with towns) are laid out in a way that require a 4:00 (SE) to 10:00 (NW) (or vice versa) bomb run. Most of the earlier AH3 maps are the former. Those who like to be inbound and calibrated half a sector out would benefit in knowing which layout they're dealing with.