Doing a project of a 3d surface chart to show the changing temperature from several sensors. The temperature data is retrieved from MySql database.  

I need help on manually assign the sensor data on certain coordinate. Eg. [x1,y1] - sensor1 , [x2,y1] -sensor 2, [x1,y2] - sensor3, [x2,y2]-sensor 4 , etc...
Any sample coding or guidance is appreciated.

Hi Lian,
Yes sure - the following code shows how to display a chart similar to the one you attached:

   NChart chart = nChartControl1.Charts[0];
   chart.Enable3D = true;
   chart.Projection.SetPredefinedProjection(PredefinedProjection.PerspectiveTilted);
   chart.Width = chart.Height = chart.Depth = 50;

   NOrdinalScaleConfigurator xScale = chart.Axis(StandardAxis.PrimaryX).ScaleConfigurator as NOrdinalScaleConfigurator;
   xScale.AutoLabels = false;
   xScale.Labels.Add("A");
   xScale.Labels.Add("B");
   xScale.Labels.Add("C");

   NOrdinalScaleConfigurator yScale = chart.Axis(StandardAxis.Depth).ScaleConfigurator as NOrdinalScaleConfigurator;
   yScale.AutoLabels = false;
   yScale.Labels.Add("X");
   yScale.Labels.Add("Y");
   yScale.Labels.Add("Z");

   NBarSeries bar1 = new NBarSeries();
   bar1.Values.Add(10);
   bar1.Values.Add(20);
   bar1.Values.Add(30);
   chart.Series.Add(bar1);

   NBarSeries bar2 = new NBarSeries();
   bar2.Values.Add(12);
   bar2.Values.Add(22);
   bar2.Values.Add(32);
   chart.Series.Add(bar2);

   NBarSeries bar3 = new NBarSeries();
   bar3.Values.Add(15);
   bar3.Values.Add(25);
   bar3.Values.Add(35);
   chart.Series.Add(bar3);

   NStyleSheet.CreatePredefinedStyleSheet(PredefinedStyleSheet.Bright).Apply(nChartControl1.Document);

Hope this helps - let us know if you have any questions.

Best Regards,
Nevron Support Team