I am currently using triangulation to render a contour map and trying to determine if there is a property that I can set or a technique that I can use to smooth out the rough edges of my map. I have a data file with 800 data point over a small area and the fillowing map is rendered. 

Here is the logic that I am currently using...

  public void PlotChart()
   {
    var chart = nChartControl1.Charts[0];
    chart.Series.Clear();

    var triangulatedSurface = new NTriangulatedSurfaceSeries
    {
      Name = "Surface Map",
      Legend = {Mode = SeriesLegendMode.SeriesLogic},
      FillMode = SurfaceFillMode.ZoneTexture,
      ShadingMode = ShadingMode.Smooth,
      FrameMode = SurfaceFrameMode.Contour,
      FrameColorMode = SurfaceFrameColorMode.Zone,
      DrawFlat = false,
      PositionValue = 0.5,
      SyncPaletteWithAxisScale = false,
      PaletteSteps = 8,
      UsePreciseGeometry = true,
      ValueFormatter = {FormatSpecifier = "0.00"},
      FillStyle = new NColorFillStyle(Color.YellowGreen)
    };

    chart.Series.Add(triangulatedSurface);

    var modGeospatialPoints = _geospatialPoints.ToList();

    SetMapProperties();

    // Remove unwanted depth.
    var maxDepth = Convert.ToDouble(MaxDepth.SelectedIndex);
    modGeospatialPoints.RemoveAll(item => item.Y > maxDepth);

    foreach (var point in modGeospatialPoints)
    {
      triangulatedSurface.XValues.Add(point.X);
      triangulatedSurface.ZValues.Add(point.Z);
      triangulatedSurface.Values.Add(point.Y);
      Debug.WriteLine("{0}, {1}, {2}", point.X, point.Z, point.Y);
    }

    chart.Refresh();
   }