New Post: need a kick

OK, the scary thing is nobody else seems to know the web based services are displayed in WebMercator. Once I discovered that it was 5 minutes to have a Google search return a variety of conversion routines. Here is my version, as gleaned from several examples.

public static Coordinate WebMercatorToGeographic(double mercatorX, double mercatorY)

        {
        Coordinate coord = new Coordinate(0,0);
        if (((Math.Abs(mercatorX) > 20037508.3427892) || (Math.Abs(mercatorY) > 20037508.3427892)))
            {
            return coord;
            }
        double num4 = ((mercatorX / 6378137.0) * 57.295779513082323);
        double num5 = Math.Floor(Convert.ToDouble(((num4 + 180) / 360)));
        double num6 = (num4 - (num5 * 360));
        double num7 = (1.5707963267948966 - (2 * Math.Atan(Math.Exp((((1 * mercatorY) * -1) / 6378137.0)))));
        coord = new Coordinate(num6, num7 * 57.295779513082323);
        return coord;
        }

public static Coordinate GeographicToWebMercator(double lat, double lon)

        {
        Coordinate coord = new Coordinate(0,0);
        if ((Math.Abs(lon) > 180) || (Math.Abs(lat) > 90 ))
            {
            return coord;
            }
        double num = (lon * 0.017453292519943295);
        double x = (6378137.0 * num);
        double a = (lat * 0.017453292519943295);
        coord = new Coordinate(x, (3189068.5 * Math.Log(((1 + Math.Sin(a)) / (1 - Math.Sin(a))))));
        return coord;
        }

The map coordinates are converted for mouse move display to geo, and my database numbers, in geo, are converted to webmerc for plotting on the map. Works great now.