working out distances between two points using google maps api?

Question

Is it possible to send two lat long points to google to calculate the distance between the two?

Answer 1

And the distance cal in c#:

// this returns the distance in miles. for km multiply result: * 1.609344
public static double CalculateDistance(double lat1, double lon1, double lat2, double lon2)
{
    double t = lon1 - lon2;
    double distance = Math.Sin(Degree2Radius(lat1)) * Math.Sin(Degree2Radius(lat2)) + Math.Cos(Degree2Radius(lat1)) * Math.Cos(Degree2Radius(lat2)) * Math.Cos(Degree2Radius(t));
    distance = Math.Acos(distance);
    distance = Radius2Degree(distance);
    distance = distance * 60 * 1.1515;

    return distance;
}

private static double Degree2Radius(double deg)
{
    return (deg * Math.PI / 180.0);
}

private static double Radius2Degree(double rad)
{
    return rad / Math.PI * 180.0;
}