WGS84 to Web Mercator Transforms

Handy:


private void ToGeographic(ref double x, ref double y)
{
    if (Math.Abs(x) < 180 && Math.Abs(y) < 90)
        return;

    if ((Math.Abs(x) > 20037508.3427892) || (Math.Abs(y) > 20037508.3427892))
        return;

    double x = x;
    double y = y;
    double num3 = x / 6378137.0;
    double num4 = num3 * 57.295779513082323;
    double num5 = Math.Floor((double)((num4 + 180.0) / 360.0));
    double num6 = num4 - (num5 * 360.0);
    double num7 = 1.5707963267948966 - (2.0 * Math.Atan(Math.Exp((-1.0 * y) / 6378137.0)));
    x= num6;
    y= num7 * 57.295779513082323;
}

private void ToWebMercator(ref double lon, ref double lat)
{
    if ((Math.Abs(lon) > 180 || Math.Abs(lat) > 90))
        return;

    double num = lon* 0.017453292519943295;
    double x = 6378137.0 * num;
    double a = lat* 0.017453292519943295;

    lon= x;
    lat= 3189068.5 * Math.Log((1.0 + Math.Sin(a)) / (1.0 - Math.Sin(a)));
}