Sanchaeg

A modern .NET implementation of high-accuracy geography functions using Vincenty's formulae, including

• calculating distance between two points,
• calculating intersection between coordinate - bearing pairs,
• calculating resulting coordinate for an origin, bearing and distance,
• conversion between lat/lon and x/y coordinates using various Datums.

The also library includes various useful epsilon values for geography related calculations, and built-in values for WGS84, EPSG3857, GRS80, Airy1830, AiryModified, Intl1924 and Bessel1841 datums.

Usage

All the complexity is hidden away behind convenient extension methods:

using Sanchaeg;

// ...

var point1 = new SanchaegGeoCoordinate
{
    Latitude = 47.438437
    Longitude = 19.252274
};

var point2 = new SanchaegGeoCoordinate
{
    Latitude = 47.6445436,
    Longitude = -122.1370065
};

var distance = point1.CalculateDistanceBetween(point2);
Console.WriteLine($"Distance: {distance} meters");

The "usual" *Coordinate types are specifically prefixed Sanchaeg in this library to make differentiation easy between whatever else *Coordinate types you might have on your end.

Thanks

This library contains many of its calculations transcoded from Chris Veness's excellent post & library, Chris Veness © 2002-$currentYear published under the MIT License.