Trace utility network

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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
// Copyright 2021 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.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Http;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Security;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.UI;
using Esri.ArcGISRuntime.UI.Controls;
using Esri.ArcGISRuntime.UtilityNetworks;
using Microsoft.UI.Xaml;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Symbol = Esri.ArcGISRuntime.Symbology.Symbol;

namespace ArcGIS.WinUI.Samples.TraceUtilityNetwork
{
    [ArcGIS.Samples.Shared.Attributes.Sample(
        name: "Trace utility network",
        category: "Utility network",
        description: "Discover connected features in a utility network using connected, subnetwork, upstream, and downstream traces.",
        instructions: "Tap on one or more features while 'Add starting locations' or 'Add barriers' is selected. When a junction feature is identified, you may be prompted to select a terminal. When an edge feature is identified, the distance from the tapped location to the beginning of the edge feature will be computed. Select the type of trace using the drop down menu. Click 'Trace' to initiate a trace on the network. Click 'Reset' to clear the trace parameters and start over.",
        tags: new[] { "condition barriers", "downstream trace", "network analysis", "subnetwork trace", "toolkit", "trace configuration", "traversability", "upstream trace", "utility network", "validate consistency" })]
    [ArcGIS.Samples.Shared.Attributes.OfflineData()]
    public partial class TraceUtilityNetwork
    {
        // Feature service for an electric utility network in Naperville, Illinois.
        private const string FeatureServiceUrl = "https://sampleserver7.arcgisonline.com/server/rest/services/UtilityNetwork/NapervilleElectric/FeatureServer";

        private const int LineLayerId = 3;
        private const int DeviceLayerId = 0;

        // Viewpoint in the utility network area.
        private Viewpoint _startingViewpoint = new Viewpoint(new Envelope(-9812980.8041217551, 5128523.87694709, -9812798.4363710005, 5128627.6261982173, SpatialReferences.WebMercator));

        // Utility network objects.
        private UtilityNetwork _utilityNetwork;
        private List<UtilityElement> _startingLocations = new List<UtilityElement>();
        private List<UtilityElement> _barriers = new List<UtilityElement>();
        private UtilityTier _mediumVoltageTier;

        // Task completion source for the user selected terminal.
        private TaskCompletionSource<UtilityTerminal> _terminalCompletionSource = null;

        // Markers for the utility elements.
        private SimpleMarkerSymbol _startingPointSymbol;
        private SimpleMarkerSymbol _barrierPointSymbol;

        public TraceUtilityNetwork()
        {
            InitializeComponent();
            _ = Initialize();
        }

        private async Task Initialize()
        {
            // As of ArcGIS Enterprise 10.8.1, using utility network functionality requires a licensed user. The following login for the sample server is licensed to perform utility network operations.
            AuthenticationManager.Current.ChallengeHandler = new ChallengeHandler(async (info) =>
            {
                try
                {
                    // WARNING: Never hardcode login information in a production application. This is done solely for the sake of the sample.
                    string sampleServer7User = "viewer01";
                    string sampleServer7Pass = "I68VGU^nMurF";
                    return await AuthenticationManager.Current.GenerateCredentialAsync(info.ServiceUri, sampleServer7User, sampleServer7Pass);
                }
                catch (Exception ex)
                {
                    await new MessageDialog2(ex.Message, ex.Message.GetType().Name).ShowAsync();
                    return null;
                }
            });

            try
            {
                IsBusy.Visibility = Visibility.Visible;
                Status.Text = "Loading Utility Network...";

                // Create a map.
                MyMapView.Map = new Map(BasemapStyle.ArcGISStreetsNight)
                {
                    InitialViewpoint = _startingViewpoint
                };

                // Create and load a service geodatabase that matches utility network.
                ServiceGeodatabase serviceGeodatabase = await ServiceGeodatabase.CreateAsync(new Uri(FeatureServiceUrl));

                // Add the layer with electric distribution lines.
                FeatureLayer lineLayer = new FeatureLayer(serviceGeodatabase.GetTable(LineLayerId));
                UniqueValue mediumVoltageValue = new UniqueValue("N/A", "Medium Voltage", new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.DarkCyan, 3), 5);
                UniqueValue lowVoltageValue = new UniqueValue("N/A", "Low Voltage", new SimpleLineSymbol(SimpleLineSymbolStyle.Dash, System.Drawing.Color.DarkCyan, 3), 3);
                lineLayer.Renderer = new UniqueValueRenderer(new List<string>() { "ASSETGROUP" }, new List<UniqueValue>() { mediumVoltageValue, lowVoltageValue }, "", new SimpleLineSymbol());
                MyMapView.Map.OperationalLayers.Add(lineLayer);

                // Add the layer with electric devices.
                FeatureLayer electricDevicelayer = new FeatureLayer(serviceGeodatabase.GetTable(DeviceLayerId));
                MyMapView.Map.OperationalLayers.Add(electricDevicelayer);

                // Set the selection color for features in the map view.
                MyMapView.SelectionProperties = new SelectionProperties(System.Drawing.Color.Yellow);

                // Create and load the utility network.
                _utilityNetwork = await UtilityNetwork.CreateAsync(new Uri(FeatureServiceUrl), MyMapView.Map);

                // Update the trace configuration UI.
                TraceTypes.ItemsSource = new List<UtilityTraceType>() { UtilityTraceType.Connected, UtilityTraceType.Subnetwork, UtilityTraceType.Upstream, UtilityTraceType.Downstream };
                TraceTypes.SelectedIndex = 0;

                // Get the utility tier used for traces in this network. For this data set, the "Medium Voltage Radial" tier from the "ElectricDistribution" domain network is used.
                UtilityDomainNetwork domainNetwork = _utilityNetwork.Definition.GetDomainNetwork("ElectricDistribution");
                _mediumVoltageTier = domainNetwork.GetTier("Medium Voltage Radial");

                // More complex datasets may require using utility trace configurations from different tiers. The following LINQ expression gets all tiers present in the utility network.
                //IEnumerable<UtilityTier> tiers = _utilityNetwork.Definition.DomainNetworks.Select(domain => domain.Tiers).SelectMany(tier => tier);

                // Create symbols for starting locations and barriers.
                _startingPointSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Cross, System.Drawing.Color.LightGreen, 25d);
                _barrierPointSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.X, System.Drawing.Color.OrangeRed, 25d);

                // Create a graphics overlay.
                GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
                MyMapView.GraphicsOverlays.Add(graphicsOverlay);

                // Set the instruction text.
                Status.Text = "Click on the network lines or points to add a utility element.";
            }
            catch (Exception ex)
            {
                Status.Text = "Loading Utility Network failed...";
                await new MessageDialog2(ex.Message, ex.GetType().Name).ShowAsync();
            }
            finally
            {
                EnableControls();
                IsBusy.Visibility = Visibility.Collapsed;
            }
        }

        private async void OnGeoViewTapped(object sender, GeoViewInputEventArgs e)
        {
            try
            {
                IsBusy.Visibility = Visibility.Visible;
                Status.Text = "Identifying trace locations...";

                // Identify the feature to be used.
                IEnumerable<IdentifyLayerResult> identifyResult = await MyMapView.IdentifyLayersAsync(e.Position, 10.0, false);
                ArcGISFeature feature = identifyResult?.FirstOrDefault()?.GeoElements?.FirstOrDefault() as ArcGISFeature;
                if (feature == null) { return; }

                // Create element from the identified feature.
                UtilityElement element = _utilityNetwork.CreateElement(feature);

                if (element.NetworkSource.SourceType == UtilityNetworkSourceType.Junction)
                {
                    // Select terminal for junction feature.
                    IEnumerable<UtilityTerminal> terminals = element.AssetType.TerminalConfiguration?.Terminals;
                    if (terminals?.Count() > 1)
                    {
                        element.Terminal = await GetTerminalAsync(terminals);
                    }
                    Status.Text = $"Terminal: {element.Terminal?.Name ?? "default"}";
                }
                else if (element.NetworkSource.SourceType == UtilityNetworkSourceType.Edge)
                {
                    // Compute how far tapped location is along the edge feature.
                    if (feature.Geometry is Polyline line)
                    {
                        line = line.RemoveZ() as Polyline;
                        double fraction = line.FractionAlong(e.Location, -1);
                        if (double.IsNaN(fraction)) { return; }
                        element.FractionAlongEdge = fraction;
                        Status.Text = $"Fraction along edge: {element.FractionAlongEdge}";
                    }
                }

                // Check whether starting location or barrier is added to update the right collection and symbology.
                Symbol symbol = null;
                if (IsAddingStartingLocations.IsChecked.Value == true)
                {
                    _startingLocations.Add(element);
                    symbol = _startingPointSymbol;
                }
                else
                {
                    _barriers.Add(element);
                    symbol = _barrierPointSymbol;
                }

                // Add a graphic for the new utility element.
                Graphic traceLocationGraphic = new Graphic(feature.Geometry as MapPoint ?? e.Location, symbol);
                MyMapView.GraphicsOverlays.FirstOrDefault()?.Graphics.Add(traceLocationGraphic);
            }
            catch (Exception ex)
            {
                Status.Text = "Identifying locations failed.";
                await new MessageDialog2(ex.Message, ex.GetType().Name).ShowAsync();
            }
            finally
            {
                if (Status.Text.Equals("Identifying trace locations...")) { Status.Text = "Could not identify location."; }
                IsBusy.Visibility = Visibility.Collapsed;
            }
        }

        private async Task<UtilityTerminal> GetTerminalAsync(IEnumerable<UtilityTerminal> terminals)
        {
            try
            {
                MyMapView.GeoViewTapped -= OnGeoViewTapped;
                TerminalPicker.Visibility = Visibility.Visible;
                DisableControls();
                Picker.ItemsSource = terminals;
                Picker.SelectedIndex = 1;

                // Waits for user to select a terminal.
                _terminalCompletionSource = new TaskCompletionSource<UtilityTerminal>();
                return await _terminalCompletionSource.Task;
            }
            finally
            {
                TerminalPicker.Visibility = Visibility.Collapsed;
                EnableControls();
                MyMapView.GeoViewTapped += OnGeoViewTapped;
            }
        }

        private void OnTerminalSelected(object sender, RoutedEventArgs e)
        {
            _terminalCompletionSource.TrySetResult(Picker.SelectedItem as UtilityTerminal);
        }

        private void OnReset(object sender, RoutedEventArgs e)
        {
            // Reset the UI.
            Status.Text = "Click on the network lines or points to add a utility element.";
            IsBusy.Visibility = Visibility.Collapsed;
            TraceTypes.SelectedIndex = 0;

            // Clear collections of starting locations and barriers.
            _startingLocations.Clear();
            _barriers.Clear();

            // Clear the map of any locations, barriers and trace result.
            MyMapView.GraphicsOverlays.FirstOrDefault()?.Graphics.Clear();
            MyMapView.Map.OperationalLayers.OfType<FeatureLayer>().ToList().ForEach(layer => layer.ClearSelection());
        }

        private async void OnTrace(object sender, RoutedEventArgs e)
        {
            try
            {
                // Get the selected trace type.
                UtilityTraceType traceType = (UtilityTraceType)TraceTypes.SelectedItem;

                // Update the UI.
                DisableControls();
                IsBusy.Visibility = Visibility.Visible;
                Status.Text = $"Running {traceType} trace...";

                // Clear previous selection from the layers.
                MyMapView.Map.OperationalLayers.OfType<FeatureLayer>().ToList().ForEach(layer => layer.ClearSelection());

                // Build trace parameters.
                UtilityTraceParameters parameters = new UtilityTraceParameters(traceType, _startingLocations);
                foreach (UtilityElement barrier in _barriers)
                {
                    parameters.Barriers.Add(barrier);
                }

                // Set the trace configuration using the tier from the utility domain network.
                parameters.TraceConfiguration = _mediumVoltageTier.GetDefaultTraceConfiguration();

                //  Get the trace result from the utility network.
                IEnumerable<UtilityTraceResult> traceResult = await _utilityNetwork.TraceAsync(parameters);
                UtilityElementTraceResult elementTraceResult = traceResult?.FirstOrDefault() as UtilityElementTraceResult;

                // Check if there are any elements in the result.
                if (elementTraceResult?.Elements?.Count > 0)
                {
                    foreach (FeatureLayer layer in MyMapView.Map.OperationalLayers.OfType<FeatureLayer>())
                    {
                        IEnumerable<UtilityElement> elements = elementTraceResult.Elements.Where(element => element.NetworkSource.Name == layer.FeatureTable.TableName);
                        IEnumerable<Feature> features = await _utilityNetwork.GetFeaturesForElementsAsync(elements);
                        layer.SelectFeatures(features);
                    }
                }
                Status.Text = "Trace completed.";
            }
            catch (Exception ex)
            {
                Status.Text = "Trace failed...";
                if (ex is ArcGISWebException && ex.Message == null)
                {
                    await new MessageDialog2("Trace failed.", ex.GetType().Name).ShowAsync();
                }
                else
                {
                    await new MessageDialog2(ex.Message, ex.GetType().Name).ShowAsync();
                }
            }
            finally
            {
                EnableControls();
                IsBusy.Visibility = Visibility.Collapsed;
            }
        }

        private void DisableControls()
        {
            IsAddingStartingLocations.IsEnabled = BarriersButton.IsEnabled = TraceTypes.IsEnabled = TraceButton.IsEnabled = ResetButton.IsEnabled = false;
        }

        private void EnableControls()
        {
            IsAddingStartingLocations.IsEnabled = BarriersButton.IsEnabled = TraceTypes.IsEnabled = TraceButton.IsEnabled = ResetButton.IsEnabled = true;
        }
    }
}