Google Polyline Encoder/Decoder

Encode lat/lng coordinate lists to Google's polyline format (RFC-style) or decode back to points

📍 Coordinates (lat,lng per line)

🧵 Encoded Polyline

Precision:

💡 Examples

Google's encoded polyline format packs a signed lat/lng delta into a base64-like ASCII string. Precision 5 is used by Google Maps Directions API; precision 6 is used by Mapbox (Valhalla, OSRM) for extra accuracy.

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