[Terr_]

The main factor is the quantity of goods which need to be inspected, and that tends to scale with the population which is buying the goods.

> your number of entry points should scale like your perimeter

Is that really true? An entry-point is generally something the people choose to create to satisfy the pre-existing need to transport goods, by building roads, rail, harbor-piers, etc.

Border-checkpoint facilities don't spontaneously generate in trackless wilderness or barren coastlines, like some fantasy-dungeon that the Adventurers' Guild must periodically raid in to avert a stampede of monsters.

[bee_rider]

> Is that really true?

Probably not true, but very intuitive!