Show different kinds of multilayer symbols on a map similar to some pre-defined 2D simple symbol styles.
Use case
Allows you to customize a graphic with a multilayer symbol. For example, you may want more customizable symbols than the one that is provided with the API to display a unique representation of a landmark.
How to use the sample
The sample loads multilayer symbols for points, polylines, and polygons.
How it works
- Create multilayer symbols for each predefined 2D simple symbol style.
- For multilayer point symbols, use the
MultilayerPointconstructor. - For multilayer polyline symbols, use the
MultiLayerPolylineconstructor. - For multilayer polygon symbols, use the
MultiLayerPolygonconstructor.
- For multilayer point symbols, use the
- Create graphics by passing in a geometry and the associated symbol.
- Add graphics to the graphics overlay with
graphicsOverlay.Graphics.Add(graphic)
Relevant API
- Graphic
- GraphicsOverlay
- MultiLayerPoint
- MultiLayerPolygon
- MultiLayerPolyline
- PictureMarkerSymbolLayer
- SolidFillSymbolLayer
- SolidStrokeSymbolLayer
- VectorMarkerSymbolLayer
Tags
graphic, marker, multilayer, picture, symbol
Sample Code
// Copyright 2022 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.UI;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
namespace ArcGIS.WPF.Samples.RenderMultilayerSymbols
{
[ArcGIS.Samples.Shared.Attributes.Sample(
name: "Render multilayer symbols",
category: "Symbology",
description: "Show different kinds of multilayer symbols on a map similar to some pre-defined 2D simple symbol styles.",
instructions: "The sample loads multilayer symbols for points, polylines, and polygons.",
tags: new[] { "graphic", "marker", "multilayer", "picture", "symbol" })]
public partial class RenderMultilayerSymbols
{
// This is used to keep consistent distance from each symbol on the column.
private double _offset = 20.0;
public RenderMultilayerSymbols()
{
InitializeComponent();
Initialize();
}
private void Initialize()
{
MyMapView.Map = new Map(BasemapStyle.ArcGISLightGray);
var overlay = new GraphicsOverlay();
var textGraphicForMarkers = new Graphic(new MapPoint(-150, 50, SpatialReferences.Wgs84),
new TextSymbol()
{
Text = "MultilayerPoint\nsimple markers",
Color = Color.Black,
BackgroundColor = Color.White,
Size = 20,
OutlineColor = Color.Black,
OutlineWidth = 1,
});
overlay.Graphics.Add(textGraphicForMarkers);
AddPointGraphicsWithMarkerSymbols(overlay);
var textGraphicForPictureMarkers = new Graphic(new MapPoint(-80, 50, SpatialReferences.Wgs84),
new TextSymbol()
{
Text = "MultilayerPoint\npicture markers",
Color = Color.Black,
BackgroundColor = Color.White,
Size = 20,
OutlineColor = Color.Black,
OutlineWidth = 1
});
overlay.Graphics.Add(textGraphicForPictureMarkers);
// Create picture marker symbol from a Uri.
AddPointGraphicsWithPictureMarkerSymbolFromUri(overlay);
// Create picture marker symbol from embedded resources.
AddPointGraphicsWithPictureMarkerSymbolFromResources(overlay);
var textGraphicForLineSymbols = new Graphic(new MapPoint(0, 50, SpatialReferences.Wgs84),
new TextSymbol()
{
Text = "Multilayer\nPolyline",
Color = Color.Black,
BackgroundColor = Color.White,
Size = 20,
OutlineColor = Color.Black,
OutlineWidth = 1
});
overlay.Graphics.Add(textGraphicForLineSymbols);
// Create the line marker symbols.
AddLineGraphicsWithMarkerSymbols(overlay);
var textGraphicForFillSymbols = new Graphic(new MapPoint(65, 50, SpatialReferences.Wgs84),
new TextSymbol()
{
Text = "Multilayer\nPolygon",
Color = Color.Black,
BackgroundColor = Color.White,
Size = 20,
OutlineColor = Color.Black,
OutlineWidth = 1
});
overlay.Graphics.Add(textGraphicForFillSymbols);
// Create the polygon marker symbol.
AddPolygonGraphicsWithMarkerSymbols(overlay);
var textGraphicForComplexSymbols = new Graphic(new MapPoint(130, 50, SpatialReferences.Wgs84),
new TextSymbol()
{
Text = "More Multilayer\nSymbols",
Color = Color.Black,
BackgroundColor = Color.White,
Size = 20,
OutlineColor = Color.Black,
OutlineWidth = 1
});
overlay.Graphics.Add(textGraphicForComplexSymbols);
// Create the more complex multilayer points, polygons, and polylines.
AddComplexPointGraphic(overlay);
AddComplexPolygonGraphic(overlay);
AddComplexPolylineGraphic(overlay);
MyMapView.GraphicsOverlays.Add(overlay);
}
#region Create a multilayer point symbol.
private void AddPointGraphicsWithMarkerSymbols(GraphicsOverlay overlay)
{
MultilayerPointSymbol markerSymbol;
// Define a vector element, a diamond in this case.
Geometry vectorElementGeometry = Geometry.FromJson("{\"rings\":[[[0.0,2.5],[2.5,0.0],[0.0,-2.5],[-2.5,0.0],[0.0,2.5]]]}");
var vectorElementFill = new SolidFillSymbolLayer(Color.Red);
var multiLayerPolygonSymbol = new MultilayerPolygonSymbol(new[] { vectorElementFill });
var vectorMarkerDiamond = new VectorMarkerSymbolElement(vectorElementGeometry, multiLayerPolygonSymbol);
var vectorMarkerSymbol = new VectorMarkerSymbolLayer(new[] { vectorMarkerDiamond });
markerSymbol = new MultilayerPointSymbol(new[] { vectorMarkerSymbol });
// Create point graphics using the diamond symbol created above.
var diamondGraphic = new Graphic(new MapPoint(-150, 20, SpatialReferences.Wgs84), markerSymbol);
overlay.Graphics.Add(diamondGraphic);
// Define a vector element, a triangle in this case.
vectorElementGeometry = Geometry.FromJson("{\"rings\":[[[0.0,5.0],[5,-5.0],[-5,-5.0],[0.0,5.0]]]}");
vectorElementFill = new SolidFillSymbolLayer(Color.Red);
multiLayerPolygonSymbol = new MultilayerPolygonSymbol(new[] { vectorElementFill });
var vectorMarkerTriangle = new VectorMarkerSymbolElement(vectorElementGeometry, multiLayerPolygonSymbol);
vectorMarkerSymbol = new VectorMarkerSymbolLayer(new[] { vectorMarkerTriangle });
markerSymbol = new MultilayerPointSymbol(new[] { vectorMarkerSymbol });
// Create point graphics using the triangle symbol created above.
var triangleGraphic = new Graphic(new MapPoint(-150, 20 - _offset, SpatialReferences.Wgs84), markerSymbol);
overlay.Graphics.Add(triangleGraphic);
// Define a vector element, a cross in this case.
vectorElementGeometry = Geometry.FromJson("{\"paths\":[[[-1,1],[0,0],[1,-1]],[[1,1],[0,0],[-1,-1]]]}");
var vectorElementStroke = new SolidStrokeSymbolLayer(1, Color.Red);
var multilayerPolylineSymbol = new MultilayerPolylineSymbol(new[] { vectorElementStroke });
var vectorMarkerX = new VectorMarkerSymbolElement(vectorElementGeometry, multilayerPolylineSymbol);
vectorMarkerSymbol = new VectorMarkerSymbolLayer(new[] { vectorMarkerX });
markerSymbol = new MultilayerPointSymbol(new[] { vectorMarkerSymbol });
// Create point graphics using the cross symbol created above.
var crossGraphic = new Graphic(new MapPoint(-150, 20 - 2 * _offset, SpatialReferences.Wgs84), markerSymbol);
overlay.Graphics.Add(crossGraphic);
}
#endregion Create a multilayer point symbol.
#region Create a picture marker symbol from a Uri.
private void AddPointGraphicsWithPictureMarkerSymbolFromUri(GraphicsOverlay overlay)
{
var symbolUri = new Uri("https://static.arcgis.com/images/Symbols/OutdoorRecreation/Camping.png");
// Create a new symbol using asynchronous factory method from Uri.
var campsiteMarker = new PictureMarkerSymbolLayer(symbolUri)
{
Size = 40
};
var campsiteSymbol = new MultilayerPointSymbol(new[] { campsiteMarker });
var campsitePoint = new MapPoint(-80, 20, SpatialReferences.Wgs84);
// Create graphic with the location and symbol.
var campsiteGraphic = new Graphic(campsitePoint, campsiteSymbol);
overlay.Graphics.Add(campsiteGraphic);
}
#endregion Create a picture marker symbol from a Uri.
#region Create a picture marker symbol from an embedded resource.
private void AddPointGraphicsWithPictureMarkerSymbolFromResources(GraphicsOverlay overlay)
{
// Get current assembly that contains the image.
Assembly currentAssembly = Assembly.GetExecutingAssembly();
// Get the resource name of the blue pin image
string resourceStreamName = this.GetType().Assembly.GetManifestResourceNames().Single(str => str.EndsWith("pin_star_blue.png"));
// Get image as a stream from the resources.
// Picture is defined as EmbeddedResource.
using (var stream = currentAssembly.GetManifestResourceStream(resourceStreamName))
{
using (var mem = new MemoryStream())
{
stream.CopyTo(mem);
// Create a runtime image from the bytes read from the memory stream.
var img = new RuntimeImage(mem.ToArray());
// Create new PictureMarkerSymbolLayer from the runtime image object.
var pinMarker = new PictureMarkerSymbolLayer(img) { Size = 50 };
// Create a new multilayerpoint symbol with the PictureMarkerSymbolLayer.
var pinSymbol = new MultilayerPointSymbol(new[] { pinMarker });
// Create location for the pin.
var pinPoint = new MapPoint(-80, 20 - _offset, SpatialReferences.Wgs84);
// Create graphic with the location and symbol.
var pinGraphic = new Graphic(pinPoint, pinSymbol);
overlay.Graphics.Add(pinGraphic);
}
}
}
#endregion Create a picture marker symbol from an embedded resource.
#region Create a multilayer polyline symbol.
private void AddLineGraphicsWithMarkerSymbols(GraphicsOverlay overlay)
{
// Multilayer polyline symbol for different line styles.
MultilayerPolylineSymbol lineSymbol;
// Stroke used by line symbols.
SolidStrokeSymbolLayer strokeLayer;
strokeLayer = new SolidStrokeSymbolLayer(3, Color.Red);
strokeLayer.CapStyle = StrokeSymbolLayerCapStyle.Round;
// Create a polyline for the multilayer polyline symbol.
var polylineBuilder = new PolylineBuilder(SpatialReferences.Wgs84);
polylineBuilder.AddPoint(new MapPoint(-30, 20, SpatialReferences.Wgs84));
polylineBuilder.AddPoint(new MapPoint(30, 20, SpatialReferences.Wgs84));
// Dash geometric effects that define the dash and dot template used by different line style.
var dashEffect = new DashGeometricEffect();
// Create a dash effect similar to SimpleLineSymbolStyle.ShortDashDotDot.
dashEffect.DashTemplate.Add(4);
dashEffect.DashTemplate.Add(6);
dashEffect.DashTemplate.Add(0.5);
dashEffect.DashTemplate.Add(6);
dashEffect.DashTemplate.Add(0.5);
dashEffect.DashTemplate.Add(6);
strokeLayer.GeometricEffects.Add(dashEffect);
lineSymbol = new MultilayerPolylineSymbol(new List<SymbolLayer> { strokeLayer });
// Create a polyline graphic with geometry using the symbol created above.
var shortDashDotGraphic = new Graphic(polylineBuilder.ToGeometry(), lineSymbol);
overlay.Graphics.Add(shortDashDotGraphic);
polylineBuilder = new PolylineBuilder(SpatialReferences.Wgs84);
polylineBuilder.AddPoint(new MapPoint(-30, 20 - _offset, SpatialReferences.Wgs84));
polylineBuilder.AddPoint(new MapPoint(30, 20 - _offset, SpatialReferences.Wgs84));
strokeLayer = new SolidStrokeSymbolLayer(3, Color.Red);
strokeLayer.CapStyle = StrokeSymbolLayerCapStyle.Round;
dashEffect = new DashGeometricEffect();
// Create a dash effect similar to SimpleLineSymbolStyle.ShortDash.
dashEffect.DashTemplate.Add(4);
dashEffect.DashTemplate.Add(6);
strokeLayer.GeometricEffects.Add(dashEffect);
lineSymbol = new MultilayerPolylineSymbol(new List<SymbolLayer> { strokeLayer });
// Create a polyline graphic with geometry using the symbol created above.
var shortDashGraphic = new Graphic(polylineBuilder.ToGeometry(), lineSymbol);
overlay.Graphics.Add(shortDashGraphic);
polylineBuilder = new PolylineBuilder(SpatialReferences.Wgs84);
polylineBuilder.AddPoint(new MapPoint(-30, 20 - 2 * _offset, SpatialReferences.Wgs84));
polylineBuilder.AddPoint(new MapPoint(30, 20 - 2 * _offset, SpatialReferences.Wgs84));
strokeLayer = new SolidStrokeSymbolLayer(3, Color.Red);
strokeLayer.CapStyle = StrokeSymbolLayerCapStyle.Round;
dashEffect = new DashGeometricEffect();
// Create a dash effect similar to SimpleLineSymbolStyle.DashDotDot.
dashEffect.DashTemplate.Add(7);
dashEffect.DashTemplate.Add(9);
dashEffect.DashTemplate.Add(0.5);
dashEffect.DashTemplate.Add(9);
strokeLayer.GeometricEffects.Add(dashEffect);
lineSymbol = new MultilayerPolylineSymbol(new List<SymbolLayer> { strokeLayer });
// Create a polyline graphic with geometry using the symbol created above.
var dashDotGraphic = new Graphic(polylineBuilder.ToGeometry(), lineSymbol);
overlay.Graphics.Add(dashDotGraphic);
}
#endregion Create a multilayer polyline symbol.
#region Create a multilayer polygon symbol.
private void AddPolygonGraphicsWithMarkerSymbols(GraphicsOverlay overlay)
{
var polygonBuilder = new PolygonBuilder(SpatialReferences.Wgs84);
polygonBuilder.AddPoint(new MapPoint(60, 25, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(70, 25, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(70, 20, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(60, 20, SpatialReferences.Wgs84));
// Create a stroke symbol layer to be used by hatch patterns.
var strokeForHatches = new SolidStrokeSymbolLayer(2, Color.Red);
var strokeForOutline = new SolidStrokeSymbolLayer(1, Color.Black);
// Create a diagonal cross pattern hatch symbol layers for diagonal cross fill style.
var diagonalStroke1 = new HatchFillSymbolLayer(new MultilayerPolylineSymbol(new List<SymbolLayer>() { strokeForHatches }), 45);
var diagonalStroke2 = new HatchFillSymbolLayer(new MultilayerPolylineSymbol(new List<SymbolLayer>() { strokeForHatches }), -45);
diagonalStroke1.Separation = 9;
diagonalStroke2.Separation = 9;
// Create a multilayer polygon symbol with symbol layers.
var diagonalCrossPolygonSymbol = new MultilayerPolygonSymbol(new List<SymbolLayer>() { diagonalStroke1, diagonalStroke2, strokeForOutline });
// Create a polygon graphic with geometry using the symbol created above.
var diagonalCrossGraphic = new Graphic(polygonBuilder.ToGeometry(), diagonalCrossPolygonSymbol);
overlay.Graphics.Add(diagonalCrossGraphic);
polygonBuilder = new PolygonBuilder(SpatialReferences.Wgs84);
polygonBuilder.AddPoint(new MapPoint(60, 25 - _offset, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(70, 25 - _offset, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(70, 20 - _offset, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(60, 20 - _offset, SpatialReferences.Wgs84));
// Create a forward diagonal pattern hatch symbol layer for forward diagonal fill style.
var forwardDiagonal = new HatchFillSymbolLayer(new MultilayerPolylineSymbol(new List<SymbolLayer>() { strokeForHatches }), -45);
forwardDiagonal.Separation = 9;
// Create a multilayer polygon symbol with symbol layers.
var forwardDiagonalPolygonSymbol = new MultilayerPolygonSymbol(new List<SymbolLayer>() { forwardDiagonal, strokeForOutline });
// Create a polygon graphic with geometry using the symbol created above.
var forwardDiagonalGraphic = new Graphic(polygonBuilder.ToGeometry(), forwardDiagonalPolygonSymbol);
overlay.Graphics.Add(forwardDiagonalGraphic);
polygonBuilder = new PolygonBuilder(SpatialReferences.Wgs84);
polygonBuilder.AddPoint(new MapPoint(60, 25 - 2 * _offset, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(70, 25 - 2 * _offset, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(70, 20 - 2 * _offset, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(60, 20 - 2 * _offset, SpatialReferences.Wgs84));
// Create a vertical pattern hatch symbol layer for vertical fill style.
var vertical = new HatchFillSymbolLayer(new MultilayerPolylineSymbol(new List<SymbolLayer> { strokeForHatches }), 90);
vertical.Separation = 9;
// Create a multilayer polygon symbol with symbol layers.
var verticalPolygonSymbol = new MultilayerPolygonSymbol(new List<SymbolLayer> { vertical, strokeForOutline });
// Create a polygon graphic with geometry using the symbol created above.
var verticalPolygonGraphic = new Graphic(polygonBuilder.ToGeometry(), verticalPolygonSymbol);
overlay.Graphics.Add(verticalPolygonGraphic);
}
#endregion Create a multilayer polygon symbol.
#region Create complex multilayer point symbol.
private void AddComplexPointGraphic(GraphicsOverlay overlay)
{
// Create an orange envelope with reddish outline.
var orangeFillLayer = new SolidFillSymbolLayer(Color.Orange);
var pinkOutline = new SolidStrokeSymbolLayer(2, Color.Blue);
var orangeSquareGeometry = new Envelope(new MapPoint(-0.5, -0.5, SpatialReferences.Wgs84), new MapPoint(0.5, 0.5, SpatialReferences.Wgs84));
var orangeSquareVectorElement = new VectorMarkerSymbolElement(orangeSquareGeometry, new MultilayerPolygonSymbol(new List<SymbolLayer>() { orangeFillLayer, pinkOutline }));
var orangeSquareVectorMarkerLayer = new VectorMarkerSymbolLayer(new[] { orangeSquareVectorElement });
orangeSquareVectorMarkerLayer.Size = 11;
orangeSquareVectorMarkerLayer.Anchor = new SymbolAnchor(-4, -6, SymbolAnchorPlacementMode.Absolute);
// Create a black envelope.
var blackFillLayer = new SolidFillSymbolLayer(Color.Black);
var orangeOutline = new SolidStrokeSymbolLayer(2, Color.OrangeRed);
var blackSquareGeometry = new Envelope(new MapPoint(-0.5, -0.5, SpatialReferences.Wgs84), new MapPoint(0.5, 0.5, SpatialReferences.Wgs84));
var blackSquareVectorElement = new VectorMarkerSymbolElement(blackSquareGeometry, new MultilayerPolygonSymbol(new List<SymbolLayer>() { blackFillLayer, orangeOutline }));
var blackSquareVectorMarkerLayer = new VectorMarkerSymbolLayer(new[] { blackSquareVectorElement });
blackSquareVectorMarkerLayer.Size = 6;
blackSquareVectorMarkerLayer.Anchor = new SymbolAnchor(2, 1, SymbolAnchorPlacementMode.Absolute);
// Create an envelope with no purple outline.
var transparentFillLayer = new SolidFillSymbolLayer(Color.Transparent);
var purpleOutline = new SolidStrokeSymbolLayer(2, Color.Purple);
var purpleSquareGeometry = new Envelope(new MapPoint(-0.5, -0.5, SpatialReferences.Wgs84), new MapPoint(0.5, 0.5, SpatialReferences.Wgs84));
var purpleSquareVectorElement = new VectorMarkerSymbolElement(purpleSquareGeometry, new MultilayerPolygonSymbol(new List<SymbolLayer>() { transparentFillLayer, purpleOutline }));
var purpleSquareVectorMarkerLayer = new VectorMarkerSymbolLayer(new[] { purpleSquareVectorElement });
purpleSquareVectorMarkerLayer.Size = 14;
purpleSquareVectorMarkerLayer.Anchor = new SymbolAnchor(4, 2, SymbolAnchorPlacementMode.Absolute);
// First layer with its marker graphics and nested symbol layers.
Geometry hexagonElementGeometry = Geometry.FromJson("{\"rings\":[[[-2.89,5.0],[2.89,5.0],[5.77,0.0],[2.89,-5.0],[-2.89,-5.0],[-5.77,0.0],[-2.89,5.0]]]}");
var yellowFillLayer = new SolidFillSymbolLayer(Color.Yellow);
var blackOutline = new SolidStrokeSymbolLayer(2, Color.Black);
var hexagonVectorElement = new VectorMarkerSymbolElement(hexagonElementGeometry, new MultilayerPolygonSymbol(new List<SymbolLayer>() { yellowFillLayer, blackOutline }));
var hexagonVectorMarkerLayer = new VectorMarkerSymbolLayer(new[] { hexagonVectorElement });
hexagonVectorMarkerLayer.Size = 35;
// Create the multilayer point symbol.
var pointSymbol = new MultilayerPointSymbol(new List<SymbolLayer> { hexagonVectorMarkerLayer, orangeSquareVectorMarkerLayer, blackSquareVectorMarkerLayer, purpleSquareVectorMarkerLayer });
// Create the multilayer point graphic using the symbols created above.
var complexPointGraphic = new Graphic(new MapPoint(130, 20, SpatialReferences.Wgs84), pointSymbol);
overlay.Graphics.Add(complexPointGraphic);
}
#endregion Create complex multilayer point symbol.
#region Create complex multilayer polyline symbol.
private void AddComplexPolylineGraphic(GraphicsOverlay overlay)
{
// Symbol layers for multilayer polyline.
var blackDashes = new SolidStrokeSymbolLayer(1, Color.Black);
var dashEffect = new DashGeometricEffect(new double[] { 5, 3 });
blackDashes.GeometricEffects.Add(dashEffect);
blackDashes.CapStyle = StrokeSymbolLayerCapStyle.Square;
// Create the yellow stroke inside.
var yellowStroke = new SolidStrokeSymbolLayer(5, Color.Yellow);
yellowStroke.CapStyle = StrokeSymbolLayerCapStyle.Round;
// Create the black outline.
var blackOutline = new SolidStrokeSymbolLayer(7, Color.Black);
blackOutline.CapStyle = StrokeSymbolLayerCapStyle.Round;
// Create the multilayer polyline symbol.
var polylineSymbol = new MultilayerPolylineSymbol(new List<SymbolLayer> { blackOutline, yellowStroke, blackDashes });
var polylineBuilder = new PolylineBuilder(SpatialReferences.Wgs84);
polylineBuilder.AddPoint(new MapPoint(120, -25, SpatialReferences.Wgs84));
polylineBuilder.AddPoint(new MapPoint(140, -25, SpatialReferences.Wgs84));
// Create the multilayer polyline graphic with geometry using the symbols created above.
var complexLineGraphic = new Graphic(polylineBuilder.ToGeometry(), polylineSymbol);
overlay.Graphics.Add(complexLineGraphic);
}
#endregion Create complex multilayer polyline symbol.
#region Create complex multilayer polygon symbol.
private void AddComplexPolygonGraphic(GraphicsOverlay overlay)
{
// Create the black outline.
SolidStrokeSymbolLayer blackOutline = new SolidStrokeSymbolLayer(7, Color.Black);
blackOutline.CapStyle = StrokeSymbolLayerCapStyle.Round;
// Create the yellow stroke inside.
SolidStrokeSymbolLayer yellowStroke = new SolidStrokeSymbolLayer(5, Color.Yellow);
yellowStroke.CapStyle = StrokeSymbolLayerCapStyle.Round;
// Symbol layers for multilayer polyline.
SolidStrokeSymbolLayer blackDashes = new SolidStrokeSymbolLayer(1, Color.Black);
GeometricEffect dashEffect = new DashGeometricEffect(new double[] { 5, 3 });
blackDashes.GeometricEffects.Add(dashEffect);
blackDashes.CapStyle = StrokeSymbolLayerCapStyle.Square;
// Create a red filling for the polygon.
SolidFillSymbolLayer redFillLayer = new SolidFillSymbolLayer(Color.Red);
// Create the multilayer polygon symbol.
MultilayerPolygonSymbol polygonSymbol = new MultilayerPolygonSymbol(new List<SymbolLayer> { redFillLayer, blackOutline, yellowStroke, blackDashes });
// Create the polygon.
PolygonBuilder polygonBuilder = new PolygonBuilder(SpatialReferences.Wgs84);
polygonBuilder.AddPoint(new MapPoint(120, 0, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(140, 0, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(140, -10, SpatialReferences.Wgs84));
polygonBuilder.AddPoint(new MapPoint(120, -10, SpatialReferences.Wgs84));
// Create a multilayer polygon graphic with geometry using the symbols created above.
Graphic complexPolygonGraphic = new Graphic(polygonBuilder.ToGeometry(), polygonSymbol);
overlay.Graphics.Add(complexPolygonGraphic);
}
#endregion Create complex multilayer polygon symbol.
}
}