private void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs geoViewInputEventArgs) { // Get the tapped location. MapPoint tappedLocation = geoViewInputEventArgs.Location; // Show the tapped location. _tappedLocationGraphic.Geometry = tappedLocation; // Get the nearest vertex in the polygon. ProximityResult nearestVertexResult = GeometryEngine.NearestVertex(_polygonGraphic.Geometry, tappedLocation); // Get the nearest coordinate in the polygon. ProximityResult nearestCoordinateResult = GeometryEngine.NearestCoordinate(_polygonGraphic.Geometry, tappedLocation); // Get the distance to the nearest vertex in the polygon. int distanceVertex = (int)(nearestVertexResult.Distance / 1000); // Get the distance to the nearest coordinate in the polygon. int distanceCoordinate = (int)(nearestCoordinateResult.Distance / 1000); // Show the nearest vertex in blue. _nearestVertexGraphic.Geometry = nearestVertexResult.Coordinate; // Show the nearest coordinate in red. _nearestCoordinateGraphic.Geometry = nearestCoordinateResult.Coordinate; // Show the distances in the UI. _distanceLabel.Text = $"Vertex dist: {distanceVertex} km, Point dist: {distanceCoordinate} km"; }
// Accept user click point and find nearest target geometry point private async Task GetNearestCoordAsync(bool vertexOnly) { var target = _targetOverlay.Graphics.Select(g => g.Geometry).FirstOrDefault(); if (target == null) { return; } txtInstruct.Text = "Click the map to find the nearest coordinate"; var point = await MyMapView.Editor.RequestPointAsync(); ProximityResult result = null; if (vertexOnly) { result = GeometryEngine.NearestVertex(target, point); } else { result = GeometryEngine.NearestCoordinate(target, point); } _coordinateOverlay.Graphics.Clear(); _coordinateOverlay.Graphics.Add(new Graphic(point, _userPointSymbol)); _coordinateOverlay.Graphics.Add(new Graphic(result.Point)); txtResult.Visibility = Visibility.Visible; txtResult.Text = string.Format("Nearest Point: Index: {0}, Distance: {1:0.000}", result.PointIndex, result.Distance); }
private async Task UpdateGeometry(MapPoint point) { if (_selectedFeature.Geometry is Polyline line) { // Get the nearest point on the selected line. ProximityResult nearestVertex = GeometryEngine.NearestVertex(line, point); // Create a new polyline. PolylineBuilder polylineBuilder = new PolylineBuilder(line); Part part = polylineBuilder.Parts[nearestVertex.PartIndex]; // Replace the nearest point with the new point. part.SetPoint(nearestVertex.PointIndex, point); // Update the geometry of the feature. _selectedFeature.Geometry = GeometryEngine.Project(polylineBuilder.ToGeometry(), _selectedFeature.Geometry.SpatialReference); await _selectedFeature.FeatureTable.UpdateFeatureAsync(_selectedFeature); } else if (_selectedFeature.Geometry is MapPoint) { // Update the geometry of the feature. _selectedFeature.Geometry = point; await _selectedFeature.FeatureTable.UpdateFeatureAsync(_selectedFeature); } // Clear the selection. (_selectedFeature.FeatureTable.Layer as FeatureLayer).ClearSelection(); _selectedFeature = null; }
private void MapViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs geoViewInputEventArgs) { // Get the tapped location MapPoint tappedLocation = geoViewInputEventArgs.Location; // Show the tapped location _tappedLocationGraphic.Geometry = tappedLocation; // Get the nearest vertex in the polygon ProximityResult nearestVertexResult = GeometryEngine.NearestVertex(_polygonGraphic.Geometry, tappedLocation); // Get the nearest coordinate in the polygon ProximityResult nearestCoordinateResult = GeometryEngine.NearestCoordinate(_polygonGraphic.Geometry, tappedLocation); // Get the distance to the nearest vertex in the polygon int distanceVertex = (int)(nearestVertexResult.Distance / 1000); // Get the distance to the nearest coordinate in the polygon int distanceCoordinate = (int)(nearestCoordinateResult.Distance / 1000); // Show the nearest vertex in blue _nearestVertexGraphic.Geometry = nearestVertexResult.Coordinate; // Show the nearest coordinate in red _nearestCoordinateGraphic.Geometry = nearestCoordinateResult.Coordinate; // Show the distances in the UI ResultsLabel.Text = $"Vertex dist: {distanceVertex} km, Point dist: {distanceCoordinate} km"; }
private void MapViewTapped(object sender, GeoViewInputEventArgs geoViewInputEventArgs) { // Get the tapped location MapPoint tappedLocation = (MapPoint)GeometryEngine.NormalizeCentralMeridian(geoViewInputEventArgs.Location); // Show the tapped location _tappedLocationGraphic.Geometry = tappedLocation; // Get the nearest vertex in the polygon ProximityResult nearestVertexResult = GeometryEngine.NearestVertex(_polygonGraphic.Geometry, tappedLocation); // Get the nearest coordinate in the polygon ProximityResult nearestCoordinateResult = GeometryEngine.NearestCoordinate(_polygonGraphic.Geometry, tappedLocation); // Get the distance to the nearest vertex in the polygon int distanceVertex = (int)(nearestVertexResult.Distance / 1000); // Get the distance to the nearest coordinate in the polygon int distanceCoordinate = (int)(nearestCoordinateResult.Distance / 1000); // Show the nearest vertex in blue _nearestVertexGraphic.Geometry = nearestVertexResult.Coordinate; // Show the nearest coordinate in red _nearestCoordinateGraphic.Geometry = nearestCoordinateResult.Coordinate; // Show the distances in the UI ResultsLabel.Content = string.Format("Vertex dist: {0} km, Point dist: {1} km", distanceVertex, distanceCoordinate); }
/// <summary> /// Call this to set your current location and update directions based on that. /// </summary> /// <param name="location"></param> public void SetCurrentLocation(MapPoint location) { List <string> propertyNames = new List <string>(new string[] { "NextManeuver", "WaypointLocation", "SnappedLocation", "CurrentDirection", "TimeToWaypoint", "DistanceToDestination", "DistanceToWaypoint", "TimeToDestination", "MilesToDestination", "MilesToWaypoint", }); RouteDirection closest = null; double distance = double.NaN; MapPoint snappedLocation = null; Route direction = null; // Find the route part that we are currently on by snapping to each segment and see which one is the closest foreach (var dir in m_route.Routes) { var closestCandidate = (from a in dir.RouteDirections where a.Geometry is Polyline select new { Direction = a, Proximity = GeometryEngine.NearestCoordinate(a.Geometry, location) }).OrderBy(b => b.Proximity.Distance).FirstOrDefault(); if (double.IsNaN(distance) || distance < closestCandidate.Proximity.Distance) { distance = closestCandidate.Proximity.Distance; closest = closestCandidate.Direction; snappedLocation = closestCandidate.Proximity.Point; direction = dir; } } if (closest != null) { var directions = direction.RouteDirections.ToList(); var idx = directions.IndexOf(closest); if (idx < directions.Count) { RouteDirection next = directions[idx + 1]; //calculate how much is left of current route segment var segment = closest.Geometry as Polyline; var proximity = GeometryEngine.NearestVertex(segment, snappedLocation); double frac = 1 - GetFractionAlongLine(segment, proximity, snappedLocation); TimeSpan timeLeft = new TimeSpan((long)(closest.Time.Ticks * frac)); double segmentLengthLeft = (Convert.ToDouble(closest.GetLength(LinearUnits.Meters))) * frac; //Sum up the time and lengths for the remaining route segments TimeSpan totalTimeLeft = timeLeft; double totallength = segmentLengthLeft; for (int i = idx + 1; i < directions.Count; i++) { totalTimeLeft += directions[i].Time; totallength += directions[i].GetLength(LinearUnits.Meters); } //Update properties TimeToWaypoint = TimeSpan.FromSeconds(Math.Round(timeLeft.TotalSeconds)); TimeToDestination = TimeSpan.FromSeconds(Math.Round(totalTimeLeft.TotalSeconds)); DistanceToWaypoint = Math.Round(segmentLengthLeft); DistanceToDestination = Math.Round(totallength); SnappedLocation = snappedLocation; var maneuverType = next.ManeuverType; WaypointLocation = segment.Parts.Last().LastOrDefault().EndPoint; #if NETFX_CORE || WINDOWS_PHONE var maneuverUri = new Uri(string.Format("ms-appx:///Assets/Maneuvers/{0}.png", maneuverType)); #else var maneuverUri = new Uri(string.Format("pack://application:,,,/Assets/Maneuvers/{0}.png", maneuverType)); #endif if (ManeuverImage != maneuverUri) { ManeuverImage = maneuverUri; propertyNames.Add("ManeuverImage"); } NextManeuver = next.Text; RaisePropertiesChanged(propertyNames); } } }