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The data structure powering this map is a Quadtree, a tree data structure that’s used extensively for spatial indexing, image processing and more. For Quadtrees storing more than 300,000 markers, Booking achieves a p99 lookup time of less than 5.5 milliseconds. Pinterest uses Apache Druid for storing ad reporting metrics.

How Booking.com Searches Through Millions of Locations in Milliseconds

Loved it. Loaded with information. Learned something new about how quad trees can be used in mapping.
Thank you for the effort in collecting and sharing such quality content.

Quadtrees are a great way to index geospatial information. They’re very popular in game development

The whole Quastor blog is awesome, thx!