A GeoJSON-Powered Timezone Lookup Server

2025-05-20
A GeoJSON-Powered Timezone Lookup Server

This project creates a simple PHP server that matches time zones to longitude/latitude coordinates. Leveraging GeoJSON data from the Timezone Boundary Builder project, it builds an efficient database for fast timezone lookups. The server uses 'domain rectangles' for quick filtering and a 'winding number' algorithm for precise matching. Users simply send longitude/latitude coordinates to receive the standard TZ timezone designator. The project is open-source under the MIT license.

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