ArcGIS Runtime SDK for .NET Samples

Distance composite symbol

Distance composite symbol


// Copyright 2017 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:
// 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 Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using UIKit;

namespace ArcGISRuntime.Samples.UseDistanceCompositeSym
        "Distance composite symbol",
        "This sample demonstrates how to create a `DistanceCompositeSceneSymbol` with unique marker symbols to display at various distances from the camera.",
        "1. When the Scene initially loads, you will be looking at a point graphic symbolized with a 3D cone symbol.\n2. Zoom slightly closer to the graphic and the symbol will change to a blue 3D cube symbol.\n3. Zoom farther from the graphic and the symbol will change back to a 3D cone and then to a simple marker symbol.")]
    public class UseDistanceCompositeSym : UIViewController
        // Create and hold reference to the used MapView
        private SceneView _mySceneView = new SceneView();

        // URL for an image service to use as an elevation source
        private string _elevationSourceUrl = @"";

        public UseDistanceCompositeSym()
            Title = "Distance composite symbol";

        public override void ViewDidLoad()

            // Create the UI, setup the control references and execute initialization 

        public override void ViewDidLayoutSubviews()
            // Setup the visual frame for the MapView
            _mySceneView.Frame = new CoreGraphics.CGRect(
                0, 0, View.Bounds.Width, View.Bounds.Height);


        private void Initialize()
            // Create a new Scene with an imagery basemap
            Scene myScene = new Scene(Basemap.CreateImagery());

            // Create an elevation source for the Scene
            ArcGISTiledElevationSource elevationSrc = new ArcGISTiledElevationSource(new System.Uri(_elevationSourceUrl));

            // Add the Scene to the SceneView
            _mySceneView.Scene = myScene;

            // Create a new GraphicsOverlay and add it to the SceneView
            GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
            graphicsOverlay.SceneProperties.SurfacePlacement = SurfacePlacement.Relative;

            // Call a function to create a new distance composite symbol with three ranges
            DistanceCompositeSceneSymbol compositeSymbol = CreateCompositeSymbol();

            // Create a new point graphic with the composite symbol, add it to the graphics overlay
            MapPoint locationPoint = new MapPoint(-2.708471, 56.096575, 5000, SpatialReferences.Wgs84);
            Graphic pointGraphic = new Graphic(locationPoint, compositeSymbol);

            // Set the viewpoint with a new camera focused on the graphic
            Camera newCamera = new Camera(new MapPoint(-2.708471, 56.096575, 5000, SpatialReferences.Wgs84), 1500, 0, 80, 0);

        private DistanceCompositeSceneSymbol CreateCompositeSymbol()
            // Create three symbols for displaying a feature according to its distance from the camera
            // First, a blue cube symbol for when the camera is near the feature
            SimpleMarkerSceneSymbol cubeSym = new SimpleMarkerSceneSymbol(SimpleMarkerSceneSymbolStyle.Cube, System.Drawing.Color.Blue, 125, 125, 125, SceneSymbolAnchorPosition.Center);

            // 3D (cone) symbol for when the feature is at an intermediate range
            SimpleMarkerSceneSymbol coneSym = new SimpleMarkerSceneSymbol(SimpleMarkerSceneSymbolStyle.Cone, System.Drawing.Color.Red, 75, 75, 75, SceneSymbolAnchorPosition.Bottom);

            // Simple marker symbol (circle) when the feature is far from the camera
            SimpleMarkerSymbol markerSym = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, System.Drawing.Color.Yellow, 10.0);

            // Create three new ranges for displaying each symbol
            DistanceSymbolRange closeRange = new DistanceSymbolRange(cubeSym, 0, 999);
            DistanceSymbolRange midRange = new DistanceSymbolRange(coneSym, 1000, 1999);
            DistanceSymbolRange farRange = new DistanceSymbolRange(markerSym, 2000, 0);

            // Create a new DistanceCompositeSceneSymbol and add the ranges
            DistanceCompositeSceneSymbol compositeSymbol = new DistanceCompositeSceneSymbol();

            // Return the new composite symbol
            return compositeSymbol;

        private void CreateLayout()
            // Add MapView to the page

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