giulianob's 'official' radius chart
A radius indicates range or distance buildings can be built from each other.
The numbering system for building radii may seem a little confusing at first. The number does not directly correspond to the number of tiles. See chart for details.
Towers have an initial spacing radius of 6 which can be lowered with Tunnel Excavation down to 3.
- Tower level 1-3: range 3
- Tower level 4-6: range 4
- Tower level 7-9: range 5
- Tower level 10: range 6
A player made version of the radius chart
Basements have an initial spacing requirement of 6 which can be lowered with Tunnel Excavation down to 3.
Attack radius is based on the attacking city's Influence Points:
- 1-39: 0
- 40-79: 1
- 80-119: 2
- 120-159: 3
- 160+: 4