No, all 3D buildings data is provided by OpenStreetMap. This wiki page describes the model: http://wiki.openstreetmap.org/wiki/Simple_3D_buildings http://wiki.

No, all 3D buildings data is provided by OpenStreetMap. This wiki page describes the model: http://wiki.openstreetmap.org/wiki/Simple_3D_buildings http://wiki.openstreetmap.org/wiki/Simple_3D_buildings In short, all complex buildings are defined via multiple simple polygons with height, height under ground, colors, etc. For example, you can check how Saint Basils Cathedral is defined (take a look at Members list): https://openstreetmap.org/relation/3224486 https://openstreetmap.org/relation/3224486