It does happen here and there that city only zones land that it owns, and does forced eminent domain land purchases with a low-ish predetermined "raw land" pric

It does happen here and there that city only zones land that it owns, and does forced eminent domain land purchases with a low-ish predetermined "raw land" price. It's obviously hugely unpopular among land owners, and is prone to lead to court cases. But frankly, I fully support it and hope it'd be more widespread. Keeps a level playing ground and city finances healthy (after zoning, city can resell for a hefty premium). After all, city will have to pay for all the municipal infrastructure that brings a windfall for the owner. If it's used consistently without exceptions, it should be clear for all parties that urban development isn't open to private speculation.