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I would have guessed that they use quadtrees for this, splitting each non-leaf node into quadrants of more detailed maps as you zoom in.
by boomlinde 5y ago
I would have guessed that they use quadtrees for this, splitting each non-leaf node into quadrants of more detailed maps as you zoom in.
- incanus77 5y agoIt's a quadtree of sorts, but is typically done via map projection (web mercator) math so that each tile is replaced by four tiles at the next highest (more zoomed-in) zoom level. Number of tiles to cover the world at zoom z = 4^z