Viewshed (Geoprocessing)

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 // [WriteFile Name=AnalyzeViewshed, Category=Analysis] // [Legal] // Copyright 2016 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. // [Legal]  #ifdef PCH_BUILD #include "pch.hpp" #endif // PCH_BUILD  // sample headers #include "AnalyzeViewshed.h"  // ArcGIS Maps SDK headers #include "Error.h" #include "Feature.h" #include "FeatureCollectionTable.h" #include "FeatureIterator.h" #include "Field.h" #include "GeoprocessingFeatures.h" #include "GeoprocessingJob.h" #include "GeoprocessingParameter.h" #include "GeoprocessingParameters.h" #include "GeoprocessingResult.h" #include "GeoprocessingTask.h" #include "GeoprocessingTypes.h" #include "Graphic.h" #include "GraphicListModel.h" #include "GraphicsOverlay.h" #include "GraphicsOverlayListModel.h" #include "Map.h" #include "MapQuickView.h" #include "MapTypes.h" #include "MapViewTypes.h" #include "Point.h" #include "SimpleFillSymbol.h" #include "SimpleMarkerSymbol.h" #include "SimpleRenderer.h" #include "SpatialReference.h" #include "SymbolTypes.h" #include "TaskTypes.h" #include "Viewpoint.h"  // Qt headers #include <QFuture> #include <QMouseEvent> #include <QUuid>  using namespace Esri::ArcGISRuntime;  AnalyzeViewshed::AnalyzeViewshed(QQuickItem* parent /* = nullptr */):  QQuickItem(parent) { }  AnalyzeViewshed::~AnalyzeViewshed() = default;  void AnalyzeViewshed::init() {  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");  qmlRegisterType<AnalyzeViewshed>("Esri.Samples", 1, 0, "AnalyzeViewshedSample"); }  void AnalyzeViewshed::componentComplete() {  QQuickItem::componentComplete();   // find QML MapView component  m_mapView = findChild<MapQuickView*>("mapView");  m_mapView->setWrapAroundMode(WrapAroundMode::Disabled);   // Create a map using the topographic basemap  m_map = new Map(BasemapStyle::ArcGISTopographic, this);  m_map->setInitialViewpoint(Viewpoint(Point(6.84905317262762, 45.3790902612337, SpatialReference(4326)), 100000));   // Set map to map view  m_mapView->setMap(m_map);   // Create the GeoprocessingTask  m_viewshedTask = new GeoprocessingTask(QUrl("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Elevation/ESRI_Elevation_World/GPServer/Viewshed"), this);   // Create the Graphics Overlays  createOverlays();   // Connect signals  connectSignals(); }  void AnalyzeViewshed::createOverlays() {  // Create the graphics overlays for the input and output  m_inputOverlay = new GraphicsOverlay(this);  m_inputGraphic = new Graphic(this);  m_inputOverlay->graphics()->append(m_inputGraphic);  SimpleMarkerSymbol* sms = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor("red"), 12.0, this);  SimpleRenderer* inputRenderer = new SimpleRenderer(sms, this);  m_inputOverlay->setRenderer(inputRenderer);  m_mapView->graphicsOverlays()->append(m_inputOverlay);   m_resultsOverlay = new GraphicsOverlay(this);  SimpleFillSymbol* sfs = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(226, 119, 40, 100), this);  SimpleRenderer* outputRenderer = new SimpleRenderer(sfs, this);  m_resultsOverlay->setRenderer(outputRenderer);  m_mapView->graphicsOverlays()->append(m_resultsOverlay); }  void AnalyzeViewshed::connectSignals() {  // Set up signal handler for the mouse clicked signal  connect(m_mapView, &MapQuickView::mouseClicked, this, [this](QMouseEvent& mouse)  {  // The geoprocessing task is still executing, don't do anything else (i.e. respond to  // more user taps) until the processing is complete.  if (m_viewshedInProgress)  return;   // Indicate that the geoprocessing is running  m_viewshedInProgress = true;   // Clear previous viewshed geoprocessing task results  m_resultsOverlay->graphics()->clear();  if (m_graphicParent)  {  delete m_graphicParent;  m_graphicParent = nullptr;  }   // Create a marker graphic where the user clicked on the map and add it to the existing graphics overlay  Point mapPoint = m_mapView->screenToLocation(mouse.position().x(), mouse.position().y());  if (m_inputGraphic)  m_inputGraphic->setGeometry(mapPoint);   // Setup the geoprocessing task  calculateViewshed();  });   // Connect to the GP Task's errorOccurred signal  connect(m_viewshedTask, &GeoprocessingTask::errorOccurred, this, [this](const Error& error)  {  emit displayErrorDialog("Geoprocessing Task failed", error.message());  }); }  void AnalyzeViewshed::calculateViewshed() {  // Create a new feature collection table based upon point geometries using the current map view spatial reference  FeatureCollectionTable* inputFeatures = new FeatureCollectionTable(QList<Field>(),  GeometryType::Point,  SpatialReference::webMercator(),  this);   // Create a new feature from the feature collection table. It will not have a coordinate location (x,y) yet  Feature* inputFeature = inputFeatures->createFeature(this);   // Assign a physical location to the new point feature based upon where the user clicked on the map view  inputFeature->setGeometry(m_inputOverlay->graphics()->at(0)->geometry());   // Add the new feature with (x,y) location to the feature collection table  inputFeatures->addFeatureAsync(inputFeature).then(this, [this, inputFeatures]()  {  onAddFeatureCompleted_(inputFeatures);  }); }  void AnalyzeViewshed::onAddFeatureCompleted_(FeatureCollectionTable* inputFeatures) {  // Create the parameters that are passed to the used geoprocessing task  GeoprocessingParameters viewshedParameters = GeoprocessingParameters(GeoprocessingExecutionType::SynchronousExecute);   // Request the output features to use the same SpatialReference as the map view  viewshedParameters.setOutputSpatialReference(SpatialReference::webMercator());   // Add an input location to the geoprocessing parameters  QMap<QString, GeoprocessingParameter*> inputs;  inputs["Input_Observation_Point"] = new GeoprocessingFeatures(inputFeatures, this);  viewshedParameters.setInputs(inputs);   // Create the job that handles the communication between the application and the geoprocessing task  GeoprocessingJob* viewshedJob = m_viewshedTask->createJob(viewshedParameters);   // Create signal handler for the job  connect(viewshedJob, &GeoprocessingJob::statusChanged, this, [this, viewshedJob](JobStatus jobStatus)  {  switch (jobStatus)  {  case JobStatus::Failed:  emit displayErrorDialog("Geoprocessing Task failed", !viewshedJob->error().isEmpty() ? viewshedJob->error().message() : "Unknown error.");  m_viewshedInProgress = false;  m_jobStatus = "Job failed";  break;  case JobStatus::Started:  m_viewshedInProgress = true;  m_jobStatus = "Job in progress...";  break;  case JobStatus::Paused:  m_viewshedInProgress = false;  m_jobStatus = "Job paused...";  break;  case JobStatus::Succeeded:  m_viewshedInProgress = false;  m_jobStatus = "Job succeeded";  // handle the results  processResults(viewshedJob->result());  break;  default:  break;  }   // emit signals  emit viewshedInProgressChanged();  emit statusChanged();  });   // start the job  viewshedJob->start(); }  void AnalyzeViewshed::processResults(GeoprocessingResult *results) {  // Get the results from the outputs as GeoprocessingFeatures  const auto outputs = results->outputs();  GeoprocessingFeatures* viewshedResultFeatures = static_cast<GeoprocessingFeatures*>(outputs["Viewshed_Result"]);   // Create the parent for the graphic  if (!m_graphicParent)  m_graphicParent = new QObject(this);   // Add all the features from the result feature set as a graphics to the map  FeatureIterator features = viewshedResultFeatures->features()->iterator();  while (features.hasNext())  {  Feature* feat = features.next(this);  Graphic* graphic = new Graphic(feat->geometry(), m_graphicParent);  m_resultsOverlay->graphics()->append(graphic);  } }