Columbae

A geo library, based on Polylines, for dotnet core

Polylines

The polylines concept is designed by google: https://developers.google.com/maps/documentation/utilities/polylinealgorithm

Documentation

Encoding & decoding

Encoding multiple points

Encoding polyline can be done, just by executing the ToString() method overload.

var points = new List<Polypoint> {
    new Polypoint(latitude: 41.86231, longitude: -87.63804),
    new Polypoint(latitude: 41.87458, longitude: -87.63460),
};
var polyline = new Polyline(points);

Console.WriteLine(polyline.ToString()); // mfo~Fvx{uOukAoT

Decoding a polyline string to Points

Decoding a polyline can be done, just by passing the poly line string to the constructor.

var polylineString = "mfo~Fvx{uOukAoT";
var polyline = new Polyline(polylineString);

foreach(var point in polyline.Points)
{
    Console.WriteLine(point);
}

Origin

Credits

The actual parsing logic is based on the repo of Polyliner.NET by sglogowski.

Name

Named after the fast moving star Mu Columbae, which is a Runaway star. A runaway star is one that is moving through space with an abnormally high velocity relative to the surrounding interstellar medium. The proper motion of a runaway star often points exactly away from a stellar association, of which the star was formerly a member, before it was hurled out.