//When location changes, push this location to the route datasource
private void LocationDisplay_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
if (e.PropertyName == "Location")
{
if (LocationDisplay.Location != null && LocationDisplay.Location.Position != null && !LocationDisplay.Location.Position.IsEmpty)
{
if (Route != null)
{
Route.SetCurrentLocation(LocationDisplay.Location.Position);
}
if (firstLocation)
{
var accuracy = double.IsNaN(LocationDisplay.Location.HorizontalAccuracy) ? 0 :
LocationDisplay.Location.HorizontalAccuracy;
ViewpointRequested = new Viewpoint(
GeometryEngine.BufferGeodetic(LocationDisplay.Location.Position, accuracy + 500, LinearUnits.Meters)
);
firstLocation = false;
if (Route == null && m_routeTaskCancellationToken == null && !string.IsNullOrWhiteSpace(RouteToAddress)) //calculate route now
//Calculate a route from the address
{
GenerateRoute(RouteToAddress);
}
}
}
}
}
private async void LostPet_ClickAsync(object sender, EventArgs e)
{
if (_selectedLocation == null)
{
return;
}
_lostLocation = _selectedLocation;
_lostOverlay.Graphics.Clear();
_bufferOverlay.Graphics.Clear();
Geometry bufferGeometryGeodesic = GeometryEngine.BufferGeodetic(_lostLocation, _radius, LinearUnits.Miles, double.NaN, GeodeticCurveType.Geodesic);
Color customColor = Color.FromArgb(60, Color.Orange);
Graphic geodesicBufferGraphic = new Graphic(bufferGeometryGeodesic, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, customColor, new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Black, 2.0)));
Console.WriteLine(bufferGeometryGeodesic.ToJson());
Console.WriteLine(bufferGeometryGeodesic.ToString());
Console.WriteLine(bufferGeometryGeodesic.GeometryType.ToString());
Geometry bufferGeometryGeodesic2 = GeometryEngine.BufferGeodetic(_lostLocation, _radius * 0.66, LinearUnits.Miles, double.NaN, GeodeticCurveType.Geodesic);
Geometry bufferGeometryGeodesic3 = GeometryEngine.BufferGeodetic(_lostLocation, _radius * 0.33, LinearUnits.Miles, double.NaN, GeodeticCurveType.Geodesic);
Graphic geodesicBufferGraphic2 = new Graphic(bufferGeometryGeodesic2, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, customColor, new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Black, 2.0)));
Graphic geodesicBufferGraphic3 = new Graphic(bufferGeometryGeodesic3, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, customColor, new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Black, 2.0)));
_bufferOverlay.Graphics.Add(geodesicBufferGraphic);
_bufferOverlay.Graphics.Add(geodesicBufferGraphic2);
_bufferOverlay.Graphics.Add(geodesicBufferGraphic3);
await _mapView.SetViewpointAsync(new Viewpoint(geodesicBufferGraphic.Geometry.Extent));
CreateErrorDialog("Lost dog submitted to GeoEvent");
}
private void ConfigureTileLayerOverrides(GenerateOfflineMapParameterOverrides overrides)
{
// Create a parameter key for the first basemap layer.
OfflineMapParametersKey basemapKey = new OfflineMapParametersKey(MyMapView.Map.Basemap.BaseLayers.First());
// Get the export tile cache parameters for the layer key.
ExportTileCacheParameters basemapParams = overrides.ExportTileCacheParameters[basemapKey];
// Clear the existing level IDs.
basemapParams.LevelIds.Clear();
// Get the min and max scale from the UI.
int minScale = (int)MinScaleEntry.Value;
int maxScale = (int)MaxScaleEntry.Value;
// Re-add selected scales.
for (int i = minScale; i < maxScale; i++)
{
basemapParams.LevelIds.Add(i);
}
// Expand the area of interest based on the specified buffer distance.
int bufferDistance = (int)ExtentBufferEntry.Value;
basemapParams.AreaOfInterest = GeometryEngine.BufferGeodetic(_areaOfInterest, bufferDistance, LinearUnits.Meters);
}
protected Polygon CreatePolygon(Esri.ArcGISRuntime.Geometry.PointCollection mappoints)
{
var poly = new Polygon(mappoints); // new List<Esri.ArcGISRuntime.Geometry.PointCollection> { points }, sref);
GeometryEngine.BufferGeodetic(poly, 0, LinearUnits.Kilometers);
//GeometryEngine.DensifyGeodetic(poly, 10, LinearUnits.Kilometers);
return(poly);
}
public virtual List <T> ListByPosition(MapPoint point, double toleranceMeters = 0)
{
Geometry buf = (toleranceMeters > 0 ? GeometryEngine.BufferGeodetic(point, toleranceMeters, LinearUnits.Meters) : point);
IEnumerable <T> elements = Elements.Where(r => GeometryEngine.Intersects(r.Graphic.Geometry, buf));
return(elements.ToList());
}
public virtual T ByPosition(MapPoint point, double toleranceMeters = 0)
{
Geometry buf = (toleranceMeters > 0 ? GeometryEngine.BufferGeodetic(point, toleranceMeters, LinearUnits.Meters) : point);
IEnumerable <T> elements = Elements.Where(r => GeometryEngine.Intersects(r.Graphic.Geometry, buf));
//Console.WriteLine("ByPosition({0}) found {1} elements", typeof(T).Name, elements.Count());
return(elements.FirstOrDefault());
}
public FakeLocationDataSource()
{
// Generate the points that will be used.
// The location will walk around a circle around the point.
Polygon outerCircle = (Polygon)GeometryEngine.BufferGeodetic(_circleRouteCenter, 1000, LinearUnits.Feet);
// Get a list of points on the circle from the buffered point.
_artificialMapPoints = outerCircle.Parts[0].Points.ToList();
}
private void OnAddPolygonsCommand()
{
var points = GetPoints();
foreach (var point in points)
{
var polygon = GeometryEngine.BufferGeodetic(point, 3, LinearUnits.Kilometers);
GraphicsProvider.Publish(new MapObject(polygon)
{
LayerId = LayerKeys.Polygon.ToString()
});
}
}
public FakeLocationDataSource()
{
// Generate the points that will be used.
// The location will walk around a circle around the point.
Polygon outerCircle = (Polygon)GeometryEngine.BufferGeodetic(_circleRouteCenter, 1000, LinearUnits.Feet);
// Get a list of points on the circle from the buffered point.
_artificialMapPoints = outerCircle.Parts[0].Points.ToList();
// Create the timer and configure it to repeat every second.
_timer = new Timer(1000);
_timer.AutoReset = true;
// Listen for timer elapsed events.
_timer.Elapsed += TimerOnElapsed;
}
private void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Hide keyboard if present.
_bufferDistanceMilesTextField.ResignFirstResponder();
try
{
// Get the location tapped by the user (a map point in the WebMercator projected coordinate system).
MapPoint userTapPoint = e.Location;
// Get the buffer distance (miles) entered in the text box.
double bufferInMiles = Convert.ToDouble(_bufferDistanceMilesTextField.Text);
// Call a helper method to convert the input distance to meters.
double bufferInMeters = LinearUnits.Miles.ToMeters(bufferInMiles);
// Create a planar buffer graphic around the input location at the specified distance.
Geometry bufferGeometryPlanar = GeometryEngine.Buffer(userTapPoint, bufferInMeters);
Graphic planarBufferGraphic = new Graphic(bufferGeometryPlanar);
// Create a geodesic buffer graphic using the same location and distance.
Geometry bufferGeometryGeodesic = GeometryEngine.BufferGeodetic(userTapPoint, bufferInMeters, LinearUnits.Meters, double.NaN, GeodeticCurveType.Geodesic);
Graphic geodesicBufferGraphic = new Graphic(bufferGeometryGeodesic);
// Create a graphic for the user tap location.
Graphic locationGraphic = new Graphic(userTapPoint);
// Get the graphics overlays.
GraphicsOverlay planarBufferGraphicsOverlay = _myMapView.GraphicsOverlays["PlanarPolys"];
GraphicsOverlay geodesicBufferGraphicsOverlay = _myMapView.GraphicsOverlays["GeodesicPolys"];
GraphicsOverlay tapPointGraphicsOverlay = _myMapView.GraphicsOverlays["TapPoints"];
// Add the buffer polygons and tap location graphics to the appropriate graphic overlays.
planarBufferGraphicsOverlay.Graphics.Add(planarBufferGraphic);
geodesicBufferGraphicsOverlay.Graphics.Add(geodesicBufferGraphic);
tapPointGraphicsOverlay.Graphics.Add(locationGraphic);
}
catch (Exception ex)
{
// Display an error message if there is a problem generating the buffers.
UIAlertController alertController = UIAlertController.Create("Error creating buffers", ex.Message, UIAlertControllerStyle.Alert);
alertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alertController, true, null);
}
}
private void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
try
{
// Get the location tapped by the user (a map point in the WebMercator projected coordinate system).
MapPoint userTapPoint = e.Location;
// Get the buffer distance (miles) entered in the text box.
double bufferInMiles = System.Convert.ToDouble(_bufferDistanceMilesEditText.Text);
// Call a helper method to convert the input distance to meters.
double bufferInMeters = LinearUnits.Miles.ToMeters(bufferInMiles);
// Create a planar buffer graphic around the input location at the specified distance.
Geometry bufferGeometryPlanar = GeometryEngine.Buffer(userTapPoint, bufferInMeters);
Graphic planarBufferGraphic = new Graphic(bufferGeometryPlanar);
// Create a geodesic buffer graphic using the same location and distance.
Geometry bufferGeometryGeodesic = GeometryEngine.BufferGeodetic(userTapPoint, bufferInMeters, LinearUnits.Meters, double.NaN, GeodeticCurveType.Geodesic);
Graphic geodesicBufferGraphic = new Graphic(bufferGeometryGeodesic);
// Create a graphic for the user tap location.
Graphic locationGraphic = new Graphic(userTapPoint);
// Get the graphics overlays.
GraphicsOverlay planarBufferGraphicsOverlay = _myMapView.GraphicsOverlays["PlanarPolys"];
GraphicsOverlay geodesicBufferGraphicsOverlay = _myMapView.GraphicsOverlays["GeodesicPolys"];
GraphicsOverlay tapPointGraphicsOverlay = _myMapView.GraphicsOverlays["TapPoints"];
// Add the buffer polygons and tap location graphics to the appropriate graphic overlays.
planarBufferGraphicsOverlay.Graphics.Add(planarBufferGraphic);
geodesicBufferGraphicsOverlay.Graphics.Add(geodesicBufferGraphic);
tapPointGraphicsOverlay.Graphics.Add(locationGraphic);
}
catch (System.Exception ex)
{
// Display an error message if there is a problem generating the buffer polygon.
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
alertBuilder.SetTitle("There was a problem generating buffers.");
alertBuilder.SetMessage(ex.ToString());
alertBuilder.Show();
}
}
protected override void GenerateGraphicFor(Sensor element)
{
MapPoint position = element.Position.ToEsriPoint();
element.Graphic = new Graphic(position, GeneralRenderers.SensorPicSymbol);
Polygon range = GeometryEngine.BufferGeodetic(position, Sensor.Range, LinearUnits.Meters) as Polygon;
element.RangeGraphic = new Graphic(range, GeneralRenderers.SensorRangeFillSymbol);
element.RangeGraphic.IsVisible = true;
Polygon alarm = GeometryEngine.BufferGeodetic(position, 1.0, LinearUnits.Meters) as Polygon;
element.AlarmGraphic = new Graphic(range, GeneralRenderers.SensorAlarmFillSymbol);
element.AlarmGraphic.IsVisible = false;
BaseOverlay.Graphics.Add(element.RangeGraphic);
BaseOverlay.Graphics.Add(element.AlarmGraphic);
BaseOverlay.Graphics.Add(element.Graphic);
}
private void ConfigureTileLayerOverrides()
{
// Create a parameter key for the first basemap layer.
OfflineMapParametersKey basemapKey = new OfflineMapParametersKey(_map.Basemap.BaseLayers.First());
// Get the export tile cache parameters for the layer key.
ExportTileCacheParameters basemapParams = _overrides.ExportTileCacheParameters[basemapKey];
// Clear the existing level IDs.
basemapParams.LevelIds.Clear();
// Re-add selected scales.
for (int i = _minScale; i < _maxScale; i++)
{
basemapParams.LevelIds.Add(i);
}
// Expand the area of interest based on the specified buffer distance.
basemapParams.AreaOfInterest = GeometryEngine.BufferGeodetic(_areaOfInterest, _bufferExtent, LinearUnits.Meters);
}
private void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
try
{
// Get the location tapped by the user (a map point in the WebMercator projected coordinate system).
MapPoint userTapPoint = e.Location;
// Get the buffer distance (miles) entered in the text box.
double bufferInMiles = System.Convert.ToDouble(BufferDistanceMilesEntry.Text);
// Call a helper method to convert the input distance to meters.
double bufferInMeters = LinearUnits.Miles.ToMeters(bufferInMiles);
// Create a planar buffer graphic around the input location at the specified distance.
Geometry bufferGeometryPlanar = GeometryEngine.Buffer(userTapPoint, bufferInMeters);
Graphic planarBufferGraphic = new Graphic(bufferGeometryPlanar);
// Create a geodesic buffer graphic using the same location and distance.
Geometry bufferGeometryGeodesic = GeometryEngine.BufferGeodetic(userTapPoint, bufferInMeters, LinearUnits.Meters, double.NaN, GeodeticCurveType.Geodesic);
Graphic geodesicBufferGraphic = new Graphic(bufferGeometryGeodesic);
// Create a graphic for the user tap location.
Graphic locationGraphic = new Graphic(userTapPoint);
// Get the graphics overlays.
GraphicsOverlay planarBufferGraphicsOverlay = MyMapView.GraphicsOverlays["PlanarPolys"];
GraphicsOverlay geodesicBufferGraphicsOverlay = MyMapView.GraphicsOverlays["GeodesicPolys"];
GraphicsOverlay tapPointGraphicsOverlay = MyMapView.GraphicsOverlays["TapPoints"];
// Add the buffer polygons and tap location graphics to the appropriate graphic overlays.
planarBufferGraphicsOverlay.Graphics.Add(planarBufferGraphic);
geodesicBufferGraphicsOverlay.Graphics.Add(geodesicBufferGraphic);
tapPointGraphicsOverlay.Graphics.Add(locationGraphic);
}
catch (System.Exception ex)
{
// Display an error message if there is a problem generating the buffers.
Page currentPage = (App.Current.MainPage as NavigationPage).CurrentPage;
currentPage.DisplayAlert(ex.Message, "Error creating buffers", "OK");
}
}
private async void HandleMapTap(MapPoint mapLocation)
{
// Normalize geometry - important for geometries that will be sent to a server for processing.
mapLocation = (MapPoint)GeometryEngine.NormalizeCentralMeridian(mapLocation);
switch (_currentSampleState)
{
case SampleState.AddingBarriers:
// Buffer the tapped point to create a larger barrier.
Geometry bufferedGeometry = GeometryEngine.BufferGeodetic(mapLocation, 500, LinearUnits.Meters);
// Create the graphic to show the barrier.
Graphic barrierGraphic = new Graphic(bufferedGeometry, _barrierSymbol);
// Add the graphic to the overlay - this will cause it to appear on the map.
_barriersOverlay.Graphics.Add(barrierGraphic);
break;
case SampleState.AddingStops:
// Get the name of this stop.
string stopName = $"{_stopsOverlay.Graphics.Count + 1}";
// Create the marker to show underneath the stop number.
PictureMarkerSymbol pushpinMarker = await GetPictureMarker();
// Create the text symbol for showing the stop.
TextSymbol stopSymbol = new TextSymbol(stopName, System.Drawing.Color.White, 15,
HorizontalAlignment.Center, VerticalAlignment.Middle);
stopSymbol.OffsetY = 15;
CompositeSymbol combinedSymbol = new CompositeSymbol(new MarkerSymbol[] { pushpinMarker, stopSymbol });
// Create the graphic to show the stop.
Graphic stopGraphic = new Graphic(mapLocation, combinedSymbol);
// Add the graphic to the overlay - this will cause it to appear on the map.
_stopsOverlay.Graphics.Add(stopGraphic);
break;
}
}
public static Geometry GetBuffer(Geometry geometry, double meters)
{
Geometry buf = GeometryEngine.BufferGeodetic(geometry, meters, LinearUnits.Meters);
return(buf);
}
