How the Math Works
- Major bonuses (+2) and standard bonuses (+1) just multiply by how many qualifying tiles or districts you have.
- Minor bonuses (+0.5) round down independently for each different source before adding them together — one Rainforest and one adjacent District on a Campus give you nothing (0.5 rounds down to 0, twice), but two of either would give +1 each.
- Flat bonuses (like a Commercial Hub's river bonus) apply once regardless of how much of that feature is technically touching the tile — it's a yes/no bonus, not a per-tile one.