Hillshade renderer

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 // Copyright 2018 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 ArcGIS.Samples.Managers; using Esri.ArcGISRuntime.Mapping; using Esri.ArcGISRuntime.Rasters; using System; using System.Threading.Tasks; using System.Windows;  namespace ArcGIS.WPF.Samples.RasterHillshade {  [ArcGIS.Samples.Shared.Attributes.Sample(  name: "Hillshade renderer",  category: "Layers",  description: "Apply a hillshade renderer to a raster.",  instructions: "Choose and adjust the settings to update the hillshade renderer on the raster layer. The sample allows you to change the Altitude, Azimuth, and Slope Type.",  tags: new[] { "altitude", "angle", "azimuth", "raster", "slope", "visualization" })] [ArcGIS.Samples.Shared.Attributes.OfflineData("ae9739163a76437ea02482e1a807b806")]  public partial class RasterHillshade  {  // Constant to store a z-factor (conversion constant) applied to the hillshade.  // If needed, this can be used to convert z-values to the same unit as the x/y coordinates or to apply a vertical exaggeration.  private const double ZFactor = 1.0;   // Constants to store the Pixel Size Power and Pixel Size Factor values.  // Use these to account for altitude changes (scale) as the viewer zooms in and out (recommended when using worldwide datasets).  private const double PixelSizePower = 1.0;  private const double PixelSizeFactor = 1.0;   // Constant to store the bit depth (pixel depth), which determines the range of values that the hillshade raster can store.  private const int PixelBitDepth = 8;   // Store a reference to the layer  private RasterLayer _rasterLayer;   public RasterHillshade()  {  InitializeComponent();   // Set up the map and load the raster layer from a local file  _ = Initialize();  }   private async Task Initialize()  {  // Create a map with a streets basemap  Map map = new Map(BasemapStyle.ArcGISStreets);   // Get the file name for the local raster dataset  string filepath = GetRasterPath();   // Load the raster file  Raster rasterFile = new Raster(filepath);   try  {  // Create and load a new raster layer to show the image  _rasterLayer = new RasterLayer(rasterFile);  await _rasterLayer.LoadAsync();   // Enable the apply renderer button when the layer loads.  ApplyHillshadeButton.IsEnabled = true;   // Create a viewpoint with the raster's full extent  Viewpoint fullRasterExtent = new Viewpoint(_rasterLayer.FullExtent);   // Set the initial viewpoint for the map  map.InitialViewpoint = fullRasterExtent;   // Add the layer to the map  map.OperationalLayers.Add(_rasterLayer);   // Add the map to the map view  MyMapView.Map = map;   // Add slope type values to the combo box  foreach (object slope in Enum.GetValues(typeof(SlopeType)))  {  SlopeTypeCombo.Items.Add(slope);  }   // Select the "Scaled" slope type enum  SlopeTypeCombo.SelectedValue = SlopeType.Scaled;  }  catch (Exception e)  {  MessageBox.Show(e.ToString(), "Error");  }  }   private void ApplyHillshadeButton_Click(object sender, System.Windows.RoutedEventArgs e)  {  // Get the current parameter values  double altitude = AltitudeSlider.Value;  double azimuth = AzimuthSlider.Value;  SlopeType typeOfSlope = (SlopeType)SlopeTypeCombo.SelectedItem;   // Create a hillshade renderer that uses the values selected by the user  HillshadeRenderer hillshadeRenderer = new HillshadeRenderer(altitude, azimuth, ZFactor, typeOfSlope, PixelSizeFactor, PixelSizePower, PixelBitDepth);   // Apply the new renderer to the raster layer  _rasterLayer.Renderer = hillshadeRenderer;  }   private static string GetRasterPath()  {  return DataManager.GetDataFolder("ae9739163a76437ea02482e1a807b806", "srtm.tiff");  }  } }