Zip Hierarchy

Routing is managed by having a small number of zones, each divided into a small number of regions which themselves have a small number of repeater stations. Thus each station is identified by three numbers, one each for zone, region and station.

Northern zones.

Zone 9 — Zone 7 — Zone 5 — Zone 3 — Zone 1

Southern zones.

Zone 8 — Zone 6 — Zone 4 — Zone 2

Here we plot the network connectivity assigning colors by region most of which repeat in each zone. enlarge

Idea: For all possible routes count the number of stations involved and the number of neighboring stations that will have to wait while the channel is occupied. Plot these as a scatter chart, hops vs neighbors.

There are about 30,000 possible routes.