Word for tight, vertical city development

I'm looking for a word capturing the city planning philosophy of building upwards and not outwards, in order to avoid urban sprawl.

A great example is the Emerald City from the Wizard of Oz, with it's vertical development, tight footprint, and abrupt border marked with a surrounding wall. The city is surrounded by nature, with no human affairs spilling outside the wall, except the yellow brick road.

The only real world example I can think of was the segregated ghettos enforced on the Jews by various European powers.

Solution 1:

Arcology:

a type of architecture concerned with the design of enormous vertical cities that maximize population density and so preserve the surrounding countrysidea city in this architectural system.

(Collins Dictionary)