> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/help/llms.txt)

# quadtree

A **quadtree** is a tree data structure in which each node has exactly four children. Map tiles are stored in quadtrees. Quadtrees allow you to zoom in and out of maps. As the [zoom level](https://docs.mapbox.com/help/glossary/zoom-level/) changes, the quads change to show more, or less, detail.

**Related resources:**

-   [Quadtree Wikipedia page](https://en.wikipedia.org/wiki/Quadtree)