/// <summary>
/// Create a heat style that bases the color intensity on the proximity of surrounding points
/// </summary>
private void AddHeatStyle(ShapeFileFeatureLayer layer)
{
// Create the heat style
var heatStyle = new HeatStyle(20, 1, DistanceUnit.Kilometer);
// Add the point style to the collection of custom styles for ZoomLevel 1.
layer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(heatStyle);
// Apply the styles for ZoomLevel 1 down to ZoomLevel 20. This effectively applies the point style on every zoom level on the map.
layer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
}
private void Refresh()
{
ShapefileLayer pointLayer = Map1.FindLayer <ShapefileLayer>("cities-900913");
if (pointLayer == null)
{
return;
}
HeatStyle heatStyle = (HeatStyle)pointLayer.Styles[0];
heatStyle.Radius = (2 - HeatPointSizeComboBox.SelectedIndex) * 30 + 20;
heatStyle.ColorPaletteType = colorPaletteType;
Map1.Refresh(RefreshType.Redraw);
}
private void Map1_Loaded(object sender, RoutedEventArgs e)
{
Map1.MapUnit = GeoUnit.Meter;
Map1.UseOpenStreetMapAsBaseMap();
ShapefileLayer pointLayer = new ShapefileLayer("SampleData/cities-900913.shp");
HeatStyle heatStyle = new HeatStyle();
heatStyle.DataColumn = columnName;
heatStyle.MaxIntensity = 37.7;
heatStyle.MinIntensity = 30;
heatStyle.Alpha = 150;
heatStyle.Radius = (2 - HeatPointSizeComboBox.SelectedIndex) * 30 + 20;
heatStyle.ColorPaletteType = colorPaletteType;
pointLayer.Styles.Add(heatStyle);
Map1.AddStaticLayers("PointOverlay", pointLayer);
Map1.ZoomTo(pointLayer.GetBound());
}
private void TestForm_Load(object sender, EventArgs e)
{
winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
winformsMap1.CurrentExtent = new RectangleShape(-125, 47, -67, 25);
winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.FromArgb(255, 198, 255, 255));
//Displays the World Map Kit as a background.
WorldMapKitWmsDesktopOverlay worldMapKitDesktopOverlay = new WorldMapKitWmsDesktopOverlay();
winformsMap1.Overlays.Add(worldMapKitDesktopOverlay);
//Point based ShapeFileFeatureSource on earth quakes used for the HeatOverlay.
ShapeFileFeatureSource featureSource = new ShapeFileFeatureSource(@"..\..\Data\quksigx020.shp");
//Creates the HeatOverlay with the point based ShapeFileFeatureSource for earthquakes.
HeatLayer heatLayer = new HeatLayer(featureSource);
//Creates the HeatStyle to set the properties determining the display of the heat map with earth quake data.
//Notice that each point is treated with an intensity depending on the value of the column "other_magn1".
//So, in addition to the density of points location, the value for each point is also going to be counted into account
//for the coloring of the map.
HeatStyle heatStyle = new HeatStyle();
heatStyle.IntensityColumnName = "other_mag1";
heatStyle.IntensityRangeStart = 0;
heatStyle.IntensityRangeEnd = 12;
//Sets the size of each point 100 kilometers of diameter.
heatStyle.Alpha = 180;
heatStyle.PointRadius = 60;
heatStyle.PointRadiusUnit = DistanceUnit.Kilometer;
heatLayer.HeatStyle = heatStyle;
LayerOverlay heatMapOverlay = new LayerOverlay();
heatMapOverlay.Layers.Add(heatLayer);
winformsMap1.Overlays.Add("HeatOverlay", heatMapOverlay);
winformsMap1.Refresh();
}
