I am having some confusion with plotting latitude, longitude, and elevation via the NMeshSurfaceSeries. I see that we have to provide indexX, and indexZ values. I am not entirely clear on why. From what I gather, the values are for an array of sorts? The data I am using is  a comma delimited file containing latitude, longitude, and elevation. How would the data be translated in the method provided below? Thanks in advance for your help.

Latitude, Longitude, Depth
3357.424,-8648.6006,1
3357.4242,-8648.6004,1
3357.4245,-8648.6001,1.1
3357.4242,-8648.6004,1.2
3357.4248,-8648.6,1.3
3357.4248,-8648.6,0.6
3357.4254,-8648.5997,0.6
3357.4254,-8648.5997,0.6
3357.4254,-8648.5997,0.6
3357.4254,-8648.5997,0.6
3357.4254,-8648.5997,0.6
3357.4265,-8648.5976,0.6
3357.4266,-8648.5971,0.7
3357.4268,-8648.5965,0.7
3357.4268,-8648.5965,0.7
3357.4268,-8648.5965,0.7
3357.427,-8648.5955,0.7
3357.427,-8648.5955,0.7
3357.4273,-8648.5943,0.8
3357.4273,-8648.5943,0.8


        private void FillData(NMeshSurfaceSeries surface)
        {
            //double x, y, z;
            //int nCountX = surface.Data.GridSizeX;
            //int nCountZ = surface.Data.GridSizeZ;

            //for (int j = 0; j < nCountZ; j++)
            //{
            //    for (int i = 0; i < nCountX; i++)
            //    {
            //        x = 2 + i + Math.Sin(j / 4.0) * 2;
            //        z = 1 + j + Math.Cos(i / 4.0);

            //        y = Math.Sin(i / 3.0) * Math.Sin(j / 3.0);

            //        if (y < 0)
            //        {
            //            y = Math.Abs(y / 2.0);
            //        }

            //        System.Diagnostics.Debug.WriteLine("{0},{1},{2},{3}", j, i, y, x, z);
            //        surface.Data.SetValue(j, i, y, x, z);
            //    }
            //}

            surface.Data.SetValue(j, i, y, x, z);

        }