This is an example of Ellipsoid 3D Mesh. It shows how to use Free Surface Renderable series in realtime with SciChart Xamarin bindings to render the Geoid 3D in realtime.

See more in Documentation for the Free Surface Mesh and realtime updates:
Plotting realtime Data in Xamarin.iOS 3D
Plotting realtime Data in Xamarin.Android 3D
Ellipsoid 3D Chart Type iOS
Ellipsoid 3D Type Android

// RealtimeGeoid3DChartViewController.cs (Xamarin.iOS)

using System;
using System.Timers;
using SciChart.iOS.Charting;
using UIKit;
using Xamarin.Examples.Demo.Utils;

namespace Xamarin.Examples.Demo.iOS
{
    [Example3DDefinition("Realtime 3D Geoid", description: "Update a Ellipsoid Mesh in real-time", icon: ExampleIcon.RealTime)]
    class RealtimeGeoid3DChartViewController : SingleChartViewController<SCIChartSurface3D>
    {
        private const int Size = 100;
        private const double HeightOffsetScale = 0.5;

        private const int TimerInterval = 20;
        private volatile bool _isRunning = false;
        private Timer _timer;
        private int _frames = 0;

        private readonly EllipsoidDataSeries3D<double> _dataSeries3D = new EllipsoidDataSeries3D<double>(Size, Size) { A = 6, B = 6, C = 6 };
        private readonly SCIDoubleValues _heightMap = new SCIDoubleValues();
        private readonly SCIDoubleValues _buffer = new SCIDoubleValues();

        protected override void InitExample()
        {
            GetGlobalHeatmap(_heightMap);
            _dataSeries3D.CopyFrom(_heightMap);

            var rSeries3D = new SCIFreeSurfaceRenderableSeries3D
            {
                DataSeries = _dataSeries3D,
                DrawMeshAs = SCIDrawMeshAs.SolidMesh,
                Stroke = 0x77228B22,
                ContourStroke = 0x77228B22,
                StrokeThickness = 2f,
                MeshColorPalette = new SCIGradientColorPalette(
                    new[] { ColorUtil.Sapphire, ColorUtil.Blue, ColorUtil.Cyan, ColorUtil.GreenYellow, ColorUtil.Yellow, ColorUtil.Red, ColorUtil.DarkRed },
                    new[] { 0, 0.1f, 0.3f, 0.5f, 0.7f, 0.9f, 1f }),
                PaletteMinimum = new SCIVector3(0, 6, 0),
                PaletteMaximum = new SCIVector3(0, 7, 0),
            };

            using (Surface.SuspendUpdates())
            {
                Surface.XAxis = new SCINumericAxis3D { VisibleRange = new SCIDoubleRange(-8, 8) };
                Surface.YAxis = new SCINumericAxis3D { VisibleRange = new SCIDoubleRange(-8, 8) };
                Surface.ZAxis = new SCINumericAxis3D { VisibleRange = new SCIDoubleRange(-8, 8) };
                Surface.RenderableSeries.Add(rSeries3D);
                Surface.ChartModifiers.Add(CreateDefault3DModifiers());

                Surface.Camera = new SCICamera3D();
                Surface.WorldDimensions = new SCIVector3(200, 200, 200);
            }

            Start();
        }

        private void Start()
        {
            if (_isRunning) return;

            _isRunning = true;
            _timer = new Timer(TimerInterval);
            _timer.Elapsed += OnTick;
            _timer.AutoReset = true;
            _timer.Start();
        }

        private void OnTick(object sender, ElapsedEventArgs e)
        {
            InvokeOnMainThread(() => 
            {
                if (!_isRunning) return;

                var freq = (Math.Sin(_frames++ * 0.1) + 1) / 2;
                var exp = freq * 10;

                var offset = _frames % Size;
                var count = _heightMap.Count;

                _buffer.Count = count;
                for (int i = 0; i < count; i++)
                {
                    var currentValueIndex = i + offset;
                    if(currentValueIndex >= count)
                    {
                        currentValueIndex -= count;
                    }

                    var currentValue = _heightMap.GetValueAt(currentValueIndex);
                    _buffer.Set(currentValue + Math.Pow(currentValue, exp) * HeightOffsetScale, i);
                }

                _dataSeries3D.CopyFrom(_buffer);
            });
        }

        private void Pause()
        {
            if (!_isRunning) return;

            _isRunning = false;
            _timer.Stop();
            _timer.Elapsed -= OnTick;
            _timer = null;
        }

        private static SCIDoubleValues GetGlobalHeatmap(SCIDoubleValues heightMapValues)
        {
            var bitmap = new UIImage("example_globe_heightmap").ToBitmap();
            var stepU = bitmap.Width / Size;
            var stepV = bitmap.Height / Size;

            heightMapValues.Count = Size * Size;
            for (uint v = 0; v < Size; v++)
            {
                for (uint u = 0; u < Size; u++)
                {
                    var index = v * Size + u;
                    var x = u * stepU;
                    var y = v * stepV;

                    var pixel = bitmap.PixelAtX(x, y).ToUIColor().R();
                    heightMapValues.Set(pixel / 255d, (int)index);
                }
            }

            return heightMapValues;
        }

        public override void ViewDidDisappear(bool animated)
        {
            base.ViewDidDisappear(animated);

            Pause();
        }
    }
}

// CreateRealtimeGeoid3DChartFragment.cs (Xamarin.Android)

using Android.Content;
using Android.Graphics;
using SciChart.Charting3D.Common.Math;
using SciChart.Charting3D.Model;
using SciChart.Charting3D.Model.DataSeries.FreeSurface;
using SciChart.Charting3D.Modifiers;
using SciChart.Charting3D.Visuals;
using SciChart.Charting3D.Visuals.Axes;
using SciChart.Charting3D.Visuals.Camera;
using SciChart.Charting3D.Visuals.RenderableSeries.Data;
using SciChart.Charting3D.Visuals.RenderableSeries.FreeSurface;
using SciChart.Core.Model;
using SciChart.Core.Utility;
using SciChart.Data.Model;
using Xamarin.Examples.Demo;
using System;
using System.Timers;
using Xamarin.Examples.Demo.Droid.Extensions;
using Xamarin.Examples.Demo.Droid.Fragments.Base;
using Color = System.Drawing.Color;

namespace Xamarin.Examples.Demo.Droid.Fragments.Examples3D
{
    [Example3DDefinition("Realtime 3D Geoid", description: "Update a Ellipsoid Mesh in real-time", icon: ExampleIcon.RealTime)]
    class CreateRealtimeGeoid3DChartFragment : ExampleBaseFragment
    {
        private const int Size = 100;
        private const double HeightOffsetScale = 0.5;

        public SciChartSurface3D Surface => View.FindViewById<SciChartSurface3D>(Resource.Id.chart3d);

        public override int ExampleLayoutId => Resource.Layout.Example_Single_3D_Chart_Fragment;

        private const int TimerInterval = 33;
        private volatile bool _isRunning = false;
        private readonly object _syncRoot = new object();
        private Timer _timer;
        private int _frames = 0;

        private readonly EllipsoidDataSeries3D<double> _dataSeries3D = new EllipsoidDataSeries3D<double>(Size, Size);
        private readonly DoubleValues _heightMap = new DoubleValues();
        private readonly DoubleValues _buffer = new DoubleValues();

        protected override void InitExample()
        {
            GetGlobalHeatmap(Activity, _heightMap);

            _dataSeries3D.SetA(6d.FromComparable());
            _dataSeries3D.SetB(6d.FromComparable());
            _dataSeries3D.SetC(6d.FromComparable());

            _dataSeries3D.CopyFrom(_heightMap);

            var renderableSeries3D = new FreeSurfaceRenderableSeries3D()
            {
                DataSeries = _dataSeries3D,
                DrawMeshAs = DrawMeshAs.SolidMesh,
                StrokeColor = Color.FromArgb(0x77, 0x22, 0x8B, 0x22),
                ContourStrokeColor = Color.FromArgb(0x77, 0x22, 0x8B, 0x22),
                StrokeThickness = 2f.ToDip(Activity),
                MeshColorPalette = new GradientColorPalette(
                    new Color[] { Color.FromArgb(0xFF, 0x1D, 0x2C, 0x6B), Color.Blue, Color.Cyan, Color.GreenYellow, Color.Yellow, Color.Red, Color.DarkRed },
                    new float[] { 0, 0.005f, 0.0075f, 0.01f, 0.5f, 0.7f, 1f }),
                PaletteMinimum = new Vector3(0, 6, 0),
                PaletteMaximum = new Vector3(0, 7, 0),
            };

            using (Surface.SuspendUpdates())
            {
                Surface.WorldDimensions.Assign(200, 200, 200);

                Surface.XAxis = new NumericAxis3D() { VisibleRange = new DoubleRange(-8, 8) };
                Surface.YAxis = new NumericAxis3D() { VisibleRange = new DoubleRange(-8, 8) };
                Surface.ZAxis = new NumericAxis3D() { VisibleRange = new DoubleRange(-8, 8) };

                Surface.Camera = new Camera3D();

                Surface.RenderableSeries.Add(renderableSeries3D);

                Surface.ChartModifiers = new ChartModifier3DCollection
                {
                    new PinchZoomModifier3D(),
                    new OrbitModifier3D(),
                    new ZoomExtentsModifier3D()
                };
            }

            Start();
        }

        private void Start()
        {
            if (_isRunning) return;

            _isRunning = true;
            _timer = new Timer(TimerInterval);
            _timer.Elapsed += OnTick;
            _timer.AutoReset = true;
            _timer.Start();
        }

        private void OnTick(object sender, ElapsedEventArgs e)
        {
            lock (_syncRoot)
            {
                if (!_isRunning) return;

                var freq = (Math.Sin(_frames++ * 0.1) + 1) / 2;
                var exp = freq * 10;

                var offset = _frames % Size;
                var size = _heightMap.Size();

                _buffer.SetSize(size);

                for (int i = 0; i < size; i++)
                {
                    var currentValueIndex = i + offset;
                    if(currentValueIndex >= size)
                    {
                        currentValueIndex -= size;
                    }

                    var currentValue = _heightMap.Get(currentValueIndex);

                    _buffer.Set(i, currentValue + Math.Pow(currentValue, exp) * HeightOffsetScale);
                }

                _dataSeries3D.CopyFrom(_buffer);
            }
        }

        public override void OnDestroyView()
        {
            base.OnDestroyView();

            Pause();
        }

        private void Pause()
        {
            if (!_isRunning) return;

            _isRunning = false;
            _timer.Stop();
            _timer.Elapsed -= OnTick;
            _timer = null;
        }

        private static DoubleValues GetGlobalHeatmap(Context context, DoubleValues heightMapValues)
        {
            var heightMap = BitmapFactory.DecodeResource(context.Resources, Resource.Drawable.example_globe_heightmap);

            var stepU = heightMap.Width / Size;
            var stepV = heightMap.Height / Size;

            heightMapValues.SetSize(Size * Size);
            for (int v = 0; v < Size; v++)
            {
                for (int u = 0; u < Size; u++)
                {
                    var index = v * Size + u;

                    var x = u * stepU;
                    var y = v * stepV;

                    var pixel = heightMap.GetPixel(x, y);
                    var red = (pixel >> 16) & 0xFF;

                    heightMapValues.Set(index, red / 255d);
                }
            }

            heightMap.Recycle();

            return heightMapValues;
        }
    }
}

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