flexible_polyline

https://github.com/ioki-mobility/ruby-flexible-polyline

The flexible polyline encoding from heremaps is a lossy compressed representation of a list of coordinate pairs or coordinate triples. It achieves that by: 1. Reducing the decimal digits of each value. 2. Encoding only the offset from the previous point. 3. Using variable length for each coordinate delta. 4. Using 64 URL-safe characters to display the result. For more information, visit: https://github.com/heremaps/flexible-polyline