I've been attempting to bring up the website on which I saw the sector map for Fort Wayne, but the site is down.
Essentially, if you start downtown at the corner of Clinton and Washington, consider that the center point. All police responses north of Washington street are handled by the north units, all responses south of Washington street are handled by the south units.
Originally when the city made the switch to the 800 MHz digital trunked system they planned on separating all police responses into the four quadrants (NW, NE, SW, SE). That's why there are four police dispatch channels. That idea was scrapped, and they decided that the west channels (NW & SW) would be primary dispatch for north and south, and the east channels (NE & SE) would be car-to-car channels for the corresponding north & south units.
If the site with the sector map comes back online soon I'll post the link to it.
mak260
"Mark"