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Problem 569. Encoding Google Maps Polylines

Created by Ned Gulley

This problem is based on the Google Polyline Encoder algorithm. This is how Google Maps encodes a line for display on a map. You will be given a single latitude-longitude pair for which you must generate the encoded string used by the Google Maps API.



 lat = 42.3 
 lon = -71.35


 str = '_vdaGnpnrL'

Here is the complete algorithm description. You can use this interactive tool to play around with it (I used it to generate the test points).


Problem Group

Solution Statistics

24 correct solutions 14 incorrect solutions
Last solution submitted on Nov 25, 2014

Problem Comments