Updated Wiki: Multiple images on one layer

• Add multiple point under one layer.
• Each point has a different Image
• Each point has a unique label which can be configured

        public void LoadMarkers()
        {
            try
            {
                //uxMap represents the DotSpatial.Control.Map instance

                double[] dd1 = new double[] { 4.99, 52.673321 };
                double[] dd2 = new double[] { 5.21, 52.912433 };
                double[] dd3 = new double[] { 5.82, 53.581653 };

                List<double[]> list = new List<double[]>();
                list.Add(dd1);
                list.Add(dd2);
                list.Add(dd3);

                //Do something similar with images
                Image img1 = Image.FromFile(@"C:\file1.png");
                Image img2 = Image.FromFile(@"C:\file2.png");
                Image img3 = Image.FromFile(@"C:\file3.png");

                List<Image> listImg = new List<Image>();
                listImg.Add(img1);
                listImg.Add(img2);
                listImg.Add(img3);

                FeatureSet pointCoords = new FeatureSet(DotSpatial.Topology.FeatureType.Point);
                pointCoords.Projection = uxMap.Projection;

                DataColumn column1 = new DataColumn("ID");
                DataColumn column2 = new DataColumn("label");

                pointCoords.DataTable.Columns.Add(column1);
                pointCoords.DataTable.Columns.Add(column2);

                pointCoords.Projection = uxMap.Projection;

                DotSpatial.Symbology.IFeatureLayer fl = uxMap.Layers.Add(pointCoords);
                MapLabelLayer ll = new MapLabelLayer();

                fl.LegendText = "<My Layer Name>";
                fl.LabelLayer = ll;

                ll.Symbolizer = new DotSpatial.Symbology.LabelSymbolizer
                {
                    FontFamily = "Tahoma",
                    FontColor = Color.Black,
                    FontSize = 8,
                    BackColor = Color.White,
                    BackColorEnabled = true,
                    BackColorOpacity = 0.5f
                };

                int pointID = 1;

                DotSpatial.Symbology.PointScheme pointScheme = new DotSpatial.Symbology.PointScheme();
                pointScheme.ClearCategories();

                foreach (var fe in list)
                {
                    double x = fe[0];
                    double y = fe[1];

                    // I use a custom class to set the coordinates of the points. 
                    // You may have to use your own depending on your projection.
                    System.Windows.Point pLo = LatLonToMeters(y, x);

                    DotSpatial.Topology.Coordinate c = new DotSpatial.Topology.Coordinate(pLo.X, pLo.Y);
                    DotSpatial.Topology.Point point = new DotSpatial.Topology.Point(c);

                    IFeature currentFeature = pointCoords.AddFeature(point);

                    currentFeature.DataRow["ID"] = pointID;
                    currentFeature.DataRow["label"] = "point #" + pointID.ToString();

                    DotSpatial.Symbology.PictureSymbol pis = new DotSpatial.Symbology.PictureSymbol();
                    DotSpatial.Symbology.PointCategory pc = new DotSpatial.Symbology.PointCategory(pis);

                    foreach (IFeature f in pointCoords.Features)
                    {
                        if (f.Coordinates[0] == currentFeature.Coordinates[0])
                        {
                            //Here you can set any image you like. You can set one for each individual point.
                            Image img = listImg[pointID - 1];

                            DotSpatial.Symbology.Size2D sz = new DotSpatial.Symbology.Size2D(img.Width, img.Height);
                            pis.Image = img;
                            pis.Size = sz;

                            pc.Symbolizer.ScaleMode = DotSpatial.Symbology.ScaleMode.Simple;
                            pc.FilterExpression = "[ID]='" + currentFeature.DataRow["ID"].ToString() + "'"; // <-- this is extremely important. Here the point ID is set
                            pc.LegendText = currentFeature.DataRow["label"].ToString();

                            pointScheme.AddCategory(pc);

                            ll.Symbology.Categories[0].Expression = "[" + fl.DataSet.DataTable.Columns[1].ColumnName + "]"; // <-- again, extremely important. Here the label value is set (Set to the point ID)
                        }
                    }

                    pointID++; // bump up the ID's with one
                }

                fl.Symbology = pointScheme;
                fl.ApplyScheme(pointScheme);
                fl.ShowLabels = true; // <-- without this set, the labels won't show

                //Some built in Invoking just in case you work from a different thread as I tend to do

                if (InvokeRequired)
                {
                    Invoke(new System.Windows.Forms.MethodInvoker(delegate
                    {
                        uxMap.Invalidate();
                        uxMap.Refresh();
                    }));
                }
                else
                {
                    uxMap.Invalidate();
                    uxMap.Refresh();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        private const int TileSize = 256;
        private const int EarthRadius = 6378137;
        private const double InitialResolution = 2 * Math.PI * EarthRadius / TileSize;
        private const double OriginShift = 2 * Math.PI * EarthRadius / 2;

        //Converts given lat/lon in WGS84 Datum to XY in Spherical Mercator EPSG:900913
        public static System.Windows.Point LatLonToMeters(double lat, double lon)
        {
            var p = new Point();
            p.X = lon * OriginShift / 180;
            p.Y = Math.Log(Math.Tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
            p.Y = p.Y * OriginShift / 180;
            return p;
        }