private void ZoomToPoint(IFeatureSet fs, int shapeIndex, double pad, MapControl mapControl)
        {
            double x, y;

            var g1 = fs.GetGeometry(shapeIndex);

            if (g1 == null)
            {
                return;
            }

            g1.GetPoint(0, out x, out y);

            var ext1 = new Envelope(x - pad, x + pad, y - pad, y + pad);

            mapControl.Extents = ext1;
        }