Rezone

You can convert barren land of one land type to another by rezoning.

Rezoning is instant.

Cost

250 + 0.6 * (ExploredAcres - 250) + 0.2 * ConqueredAcres

Reduction

Rezoning cost can be reduced by building Factories, by the Surveyor's Sense and Surveyor's Insight technologies, and by the Gnome Mechanical Genius racial spell.