undefined | Better HN

0 pointsboomlinde4y ago0 comments

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.

0 comments

1 comments · 1 top-level

incanus774y ago

It'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

j / k navigate · click thread line to collapse