[waiseristy]

How much of the terrain is interpolated out to 3d structures? I believe they are using a combination of aircraft photography and photogrammetry for cities, but at some point they have to go back to satellite imagery for sparsely populated areas

[Zee2]

Machine learning models are used for a large portion of the terrain. Trees, generic buildings, and other models are placed in the AI's "best guess" for what the fully reconstructed scene would look like.

[LegitShady]

its bing maps data, is my understanding.

[sixQuarks]

From my understanding they use algorithms to form realistic looking trees and structures from the maps data. This is the real breakthrough in my opinion. This game is really an innovation on 3D maps, and they just threw in the plane simulation as the added bonus