Terrain Yield Balancing
Plains: +2 Food, +1 Production.
Grasslands: +3 Food.
Coast: +1 Food, +1 Production, +2 Gold.
Ocean: +1 Food, +1 Gold.
Reef: +1 Food, +1 Production, -2 Gold.
Forest: +1 Production, -1 Food.
Rainforest: No yield.
The changes are primarily based on the HD settings to balance tile yields, make starting locations fairer, and correct the odd vanilla mechanic where forests and hills were more favorable for civilization development than plains.
