Azavea.Open.Reprojection.Reprojector.ConvertMercatorXToLongitude C# (CSharp) Method

        private static double ConvertMercatorXToLongitude(double x)
        {
            double longRadians = x / GeoMath.EARTH_RADIUS_AT_EQUATOR_METERS;
            double longDegrees = GeoMath.ConvertToDegrees(longRadians);

            /* The user could have panned around the world a lot of times.
            Lat long goes from -180 to 180.  So every time a user gets
            to 181 we want to subtract 360 degrees.  Every time a user
            gets to -181 we want to add 360 degrees. */

            double rotations = Math.Floor((longDegrees + 180) / 360);
            double longitude = longDegrees - (rotations * 360);
            return longitude;
        }