Simon Willison’s Weblog

OpenStreetMap: QuadTiles. Fascinating explanation of a proposal for replacing lat, lon pairs in the OpenStreetMap database with a QuadTile-based addressing system.

Posted 10th September 2009 at 3:54 pm

Recent articles

New prompt injection papers: Agents Rule of Two and The Attacker Moves Second - 2nd November 2025
Hacking the WiFi-enabled color screen GitHub Universe conference badge - 28th October 2025
Video: Building a tool to copy-paste share terminal sessions using Claude Code for web - 23rd October 2025

algorithms 15 gis 57 openstreetmap 50 quadtiles 1

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