Click one of the locations above for some taller buildings. Pan the map to see the perspective effect.
Building geometry is extracted from OpenStreetMap files. The examples here contain about 250k building footprints from Berlin and about 50k footprints from Frankfurt, Germany.
OSM Buildings is using Canvas 2D operations only - this is not WebGL.
Overall size of the minified library is 13.1k (5.7k gzipped).