Thanks Max.

Not sure why you're getting points in the negative space. Could be due to zooming or a custom range, but I don't think there'll be problems if you get the data from the chart layer, like you did.

Max,

Couple of points here.

1. From dataPoint.point I get the screen coordinates. While most values were +ve, I got some weird long -ve values (eg : -276253) and they still belonged to the PolarLayer. These values can not be mapped to the polar chart coordinates.

2. I can get the x, y and any other column value from the datasource I specified by :

int

 rowid = dataPoint.Row;

double dipval = dataPoint.Layer.ChartData.GetValue(rowid, 0);

double azimval = dataPoint.Layer.ChartData.GetValue(rowid, 1);

double propertyval = dataPoint.Layer.ChartData.GetValue(rowid, 2);

and it works great.

Now the question is, will there be a situation when the abovve statements can go wrong.

3. Thanks for helping me with the symbol stroke - that worked

4. Colors, works with simple rgb values, but I may have to go for more complex models. I will have to come back with more questions .

using dataPoint.point already gives you the chart coordinates. If you want to map those coordinates on x or y axis, use axis mapping functions:

IAdvanceAxis xAxis = (IAdvanceAxis)e.Grid["X"];
xAxis.Map(dataPoint.point.X);

For symbol outline use PE.Stroke.

Here's a code snippet that sets a range of colors:
IAdvanceAxis xAxis = (IAdvanceAxis)e.Grid["X"];
IAdvanceAxis yAxis = (IAdvanceAxis)e.Grid["Y"];

Color[] colors = { Color.Red, Color.Blue, Color.Green, Color.Yellow, Color.Violet, Color.Brown };
foreach (Primitive primitive in e.SceneGraph)
{
 PointSet pointSet = primitive as PointSet;

 if (pointSet == null)
 {
  continue;
 }
 else
 {
  int iconsize = 3;
  for (int k = 0; k < pointSet.points.Length; k++)
  {
   DataPoint dataPoint = pointSet.points[k];
   Symbol symbol = new Symbol(dataPoint.point, SymbolIcon.Diamond, (SymbolIconSize)iconsize);
   Color clr = colors[k % colors.Length];
   symbol.PE.Fill = clr;
   symbol.PE.Stroke = clr;
   e.SceneGraph.Add(symbol);
   iconsize = iconsize + 2;
   if (iconsize > 20) iconsize = 3;
  }
  break;
 }
}

Not so clean, still this code worked with some issues:

1. How do I get the x,y coord of the chart from the datapoint.point? The idea is to increase the size of points from center to the edge by 1 point, though in my sample code, I am just specifying some random size to see wheher it works.

2. How to give the Symbol outline the same color as fill. Right now, the border/outline of the symbol

is dark (is it black?)

3. Color remained the same for all points. I would like to give a range of colors.

-----------------------------here is my sample code from FillSceneGraph event----------------------------------

foreach (Primitive primitive in e.SceneGraph)
{
 PointSet pointSet = primitive as PointSet;

 if (pointSet == null)
 {
  continue;
 }
 else
 {
  int iconsize = 3;
  for (int k = 0; k < pointSet.points.Length; k++)
  {
   DataPoint dataPoint = pointSet.points[k];
   Symbol symbol = new Symbol(dataPoint.point, SymbolIcon.Diamond, (SymbolIconSize)iconsize);
   Color clr = Color.FromArgb(100,(225+iconsize),(130+iconsize*3),(76+iconsize*5));
   symbol.PE.Fill = clr;
   e.SceneGraph.Add(symbol);
   iconsize = iconsize +2; 
   if (iconsize > 20) iconsize = 3;
  }
  break;
 }
}