I have a few questions regarding the kingdom rules and settlements.
Ultimate Campaign quickly establishes the size of a hex as "about 95 square miles." A settlement is divided into districts of "about 1 square mile" in size.
What is the maximum size of a settlement in districts? It is fairly safe to assume that most settlements won't be larger than 1 square mile, but some major cities certainly can grow to be rather large.
What about multiple-hex settlements? In a high-magic setting, it isn't unheard of to see cities that have populations in the millions or more.
An official ruling would be awesome, but not necessary. I am mainly asking for curiosity's sake.
I'll have to dot this, considering my Kingmaker campaign will have use for these rules.
No input from anyone on this?
For multi-hex cities, I'd be tempted to break them up into individual boroughs in the same way as New York is made up of Brooklyn, Manhattan, etc. (and as Brooklyn is listed as being 96 square miles in size, that example fits rather nicely too!), and run each one as its own settlement. You'd probably have some kind of administrative hierarchy in place for something of that size anyway.
Chances also are that any multi-hex city is formed of settlements that were close together and eventually grew so large they grew into one another, so each could well still retain an individual identity within the greater whole.
So if you're limiting each one to a hex, you're then looking at a technical limit of 95 districts per city/borough.
It's really down to how you want to treat such things administratively, as there probably shouldn't be any rules-defined limit on such things. Personally though, I feel the above is how I'd like to do it just to get those hex-based breaks in the event, say, an invading army starts to take parts of a giant city hex by hex.
So a hex sized city would be about 4 million people possibly hard to sustain. Or if you make it underground the start of the inevitable kobold empire. either way a sight to behold.