TNT0305/PolylineEncoder.Net

PolylineEncoder.Net

Features

Allows you to encode and decode lat/long pairs into Google's encoded polyline format. You can learn more about Google's algorithm here, but you don't have to, let this package do the work for you.

Getting Started

Install via PolylineEncoder.Net package on Nuget. In Package manager run:

Install-Package PolylineEncoder.Net

Usage

It's easy to use, create an instance of IPolylineUtility and simple start encoding or decoding. You can pass in IEnumerable<IGeoCoordinate> or IEnumerable<Tuple<double,double>>.

// Create a polyline utility.
var utility = new PolylineUtility();

// Create an IEnumberable<IGeoCoordinate>
// or IEnumerable<Tuple<double,double>>
var geoPoints = new List<IGeoCoordinate>
{
    new GeoCoordinate(38.5, -120.2),
    new GeoCoordinate(40.7, -120.95),
    new GeoCoordinate(43.252, -126.453)
};

// Encode points to string.
var polyLine = utility.Encode(geoPoints); // output: _p~iF~ps|U_ulLnnqC_mqNvxq`@

// Decode string to points.
var decodedPoints = utility.Decode(polyLine); // output: An IEnumerable<IGeoCoordinate> equal to geoPoints.