Hex Group
Hex groups are used in mapmaking to provide cohesion to the random distribution of infrastructure. The game world is mapped in 20-mile hexes, this being the best size for estimating travel times for player characters and determining the movement of goods and services. As a means of expanding details of the game world, these hexes are progressively subdivided into smaller and smaller hexes, reaching all the way down to the combat hex, which is 5 ft. across.
Scale
20-mile hexes are subdivided into nine hexes that are 6.67 miles across, called "six-mile hexes" as a simplified misnomer. Two of these nine hexes are shared with adjacent 20-mile hexes, as shown in the sketch provided. Six-mile hex maps are used for local regions and to calculate general productivity and wealth.
Six-mile hex maps are subdivided into seven hexes that are