Get Distance - CSharp System

CSharp examples for System:Math Geometry

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Description

Get Distance

Demo Code


using System.Text;
using System.Linq;
using System.Collections.Generic;
using System;//from ww  w . jav  a 2  s.c  o m

public class Main{
        public static double GetDistance(double startLat, double startLng, double endLat, double endLng)
        {
            double radLat1 = rad(startLat);
            double radLat2 = rad(endLat);
            double a = radLat1 - radLat2;
            double b = rad(startLng) - rad(endLng);

            double s = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(a / 2), 2) +
             Math.Cos(radLat1) * Math.Cos(radLat2) * Math.Pow(Math.Sin(b / 2), 2)));
            s = s * EARTH_RADIUS;
            s = Math.Round(s * 10000) / 10000;
            return s;
        }
}

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