You are responsible for the improvements on your land, and you pay for the unimproved value of that land that comes from all higher levels. The local government on the other hand is responsible for local infrastructure, and pay for the city+ based unimproved value.

A landlocked country would pay less tax, a city at the mouth of a river pays higher tax, a locality with a beach pays higher tax, etc... this ensures that each level has some accountability and is incentivized to improve.

At each level is money left over after paying the tax(I hope!), and can either be invested or can be returned as a dividend.

One of the main unresolved issues with Georgism is the Disney World problem, and I believe that if you structure the tax in this way that problem goes away. Disney would simply be labeled not as a household actor, but as a city level actor.