C# Geopoint类代码示例

 // TODO: test data
 private async void OnLoaded(object sender, RoutedEventArgs e)
 {
     var locator=new Geolocator();
     var geoposition = await locator.GetGeopositionAsync();
     UserLocation = new Geopoint(new BasicGeoposition
     {
         Latitude = geoposition.Coordinate.Latitude,
         Longitude = geoposition.Coordinate.Longitude
     });
     var file = await Package.Current.InstalledLocation.GetFileAsync(@"Assets\service-icon.png");
     var geolocator = new Geolocator();
     var myPosition = await geolocator.GetGeopositionAsync();
     Recipients = new[]
     {
         new Recipient
         {
             Name = "Recipient",
             Birthday = DateTime.Now.AddYears(-20),
             Latitude = myPosition.Coordinate.Latitude,
             Longitude = myPosition.Coordinate.Longitude,
             Description = "I'm so depressed...",
             IsActive = true,
             MainPhoto = await ConvertionExtensions.ReadFile(file)
         }
     };
 }

        public async Task GetNearMapItems(Geopoint currentGeopoint)
        {
            if (_currentElements == null)
            {
                _currentElements = await _cicloStationService.GetCicloStationsAsync();
            }

            var result = _currentElements.Select(pre => new MapItem()
            {
                Id = pre.id,
                Geopoint = new Geopoint(new BasicGeoposition()
                {
                    Latitude = pre.location.Lat,
                    Longitude = pre.location.Lon
                }),
                ItemType = ItemType.EcobiciStation,
                Name = pre.name
            });

            result = result
                .OrderBy(pre => pre.Geopoint.CalculateDistance(currentGeopoint))
                .Where(pre => pre.Geopoint.CalculateDistance(currentGeopoint) <= 1)
                .Take(5);

            GetNearMapItemsCompleted?.Invoke(this, new NearMapItemEventArgs(result));
        }

        public async Task<MapLocation> GetPositionFromAddressAsync(string address)
        {
            var locator = new Geolocator();
            locator.DesiredAccuracyInMeters = 50;
            TimeSpan maxAge = new TimeSpan(0, 0, 1);
            TimeSpan timeout = new TimeSpan(0, 0, 15);
            // var position = await locator.GetGeopositionAsync();

            var basicGeoposition = new BasicGeoposition();
            var point = new Geopoint(basicGeoposition);

            var mapLocationFinderResult = await MapLocationFinder.FindLocationsAsync(address, point, 2);

            if (mapLocationFinderResult.Status == MapLocationFinderStatus.Success)
            {
                try
                {
                    return mapLocationFinderResult.Locations[0];
                }
                catch (Exception e)
                {
                    return null;
                }
                
                
            }

            return default(MapLocation);
        }

        private async void showSpaceNeedleButton_Click(object sender, RoutedEventArgs e)
        {
            if (myMap.Is3DSupported)
            {
                this.myMap.Style = MapStyle.Aerial3DWithRoads;

                BasicGeoposition spaceNeedlePosition = new BasicGeoposition();
                spaceNeedlePosition.Latitude = 47.6204;
                spaceNeedlePosition.Longitude = -122.3491;

                Geopoint spaceNeedlePoint = new Geopoint(spaceNeedlePosition);

                MapScene spaceNeedleScene = MapScene.CreateFromLocationAndRadius(spaceNeedlePoint,
                                                                                    400, /* show this many meters around */
                                                                                    135, /* looking at it to the south east*/
                                                                                    60 /* degrees pitch */);

                await myMap.TrySetSceneAsync(spaceNeedleScene);
            }
            else
            {
                string status = "3D views are not supported on this device.";
                rootPage.NotifyUser(status, NotifyType.ErrorMessage);
            }

           
        }

        private async void getAddressBtn_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                //Request permission to get location
                //Pop up will occur if your app doesnot have permission to access location service of device
                var accessStatus = await Geolocator.RequestAccessAsync();

                switch (accessStatus)
                {
                    case GeolocationAccessStatus.Allowed:
                        // The location to reverse geocode.
                        //For now i am getting my current location
                        Geolocator geolocator = new Geolocator { DesiredAccuracyInMeters = 50, DesiredAccuracy = PositionAccuracy.High }; //Set the desired accuracy that you want in meters
                        Geoposition pos = await geolocator.GetGeopositionAsync();


                        BasicGeoposition location = new BasicGeoposition();
                        location.Latitude = pos.Coordinate.Point.Position.Latitude;
                        location.Longitude = pos.Coordinate.Point.Position.Longitude;

                        Geopoint pointToReverseGeocode = new Geopoint(location);

                        // Reverse geocode the specified geographic location.
                        MapLocationFinderResult result =
                              await MapLocationFinder.FindLocationsAtAsync(pointToReverseGeocode);

                        // If the query returns results, display the name of the town
                        // contained in the address of the first result.
                        if (result.Status == MapLocationFinderStatus.Success)
                        {
                            continent.Text = result.Locations[0].Address.Continent;
                            countryName.Text = result.Locations[0].Address.Country;
                            countryCode.Text = result.Locations[0].Address.CountryCode;
                            region.Text = result.Locations[0].Address.Region;
                            town.Text = result.Locations[0].Address.Town;
                            street.Text = result.Locations[0].Address.Street;
                        }
                        else
                        {
                            await new MessageDialog("Something went wrong. Could not get finish current operation. Error: " + result.Status).ShowAsync();
                        }
                        break;

                    case GeolocationAccessStatus.Denied:
                        //Unable to get data
                        LoadPositionData(null);
                        break;

                    case GeolocationAccessStatus.Unspecified:
                        //Unable to get data
                        LoadPositionData(null);
                        break;
                }
            }
            catch (Exception ex)
            {
                await new MessageDialog("Something went wrong. Could not get finish current operation.").ShowAsync();
            }
        }

        //string imagerySet = MapType.Aerial.ToString();

        public async Task<WriteableBitmap> RequestImage(Geopoint point)
        {
            
            if (geo == null)
            {
                geo = new Geolocator();
            }
            Geoposition pos = await geo.GetGeopositionAsync();
            //Geopoint point = pos.Coordinate.Point;

            myMap.Center = new Location(point.Position.Latitude, point.Position.Longitude);
            myMap.ZoomLevel = 2;
            myMap.Width = 100;
            this.myMap.Height = 100;
            string url = String.Format("http://dev.virtualearth.net/REST/v1/Imagery/Map/{0}/{1},{2}/{3}" +
                                  "?mapSize={4},{5}&key={6}",
                               //imagerySet,
                               this.myMap.Center.Latitude,
                               this.myMap.Center.Longitude,
                               Math.Floor(this.myMap.ZoomLevel),
                               this.myMap.Width,
                               this.myMap.Height,
                               apiKey);


            var backgroundDownloader = new BackgroundDownloader();
            var file = await ApplicationData.Current.TemporaryFolder.CreateFileAsync("tempmapimage.jpg",
                CreationCollisionOption.ReplaceExisting);
            var downloadOperation = backgroundDownloader.CreateDownload(new Uri(url), file);

            await downloadOperation.StartAsync();
            return await BitmapFactory.New(1, 1).FromStream(await file.OpenReadAsync(),
                Windows.Graphics.Imaging.BitmapPixelFormat.Unknown);
        }

        private async void button_Click(object sender, RoutedEventArgs e)
        {

            if (MapControl1.IsStreetsideSupported)
            {
                
                
               BasicGeoposition cityPosition = new BasicGeoposition() { Latitude = 48.858, Longitude = 2.295 };
                Geopoint cityCenter = new Geopoint(cityPosition);
                StreetsidePanorama panoramaNearCity = await StreetsidePanorama.FindNearbyAsync(cityCenter);

                
                if (panoramaNearCity != null)
                {
                    
                    StreetsideExperience ssView = new StreetsideExperience(panoramaNearCity);
                    ssView.OverviewMapVisible = true;
                    MapControl1.CustomExperience = ssView;
                }
            }
            else
            {
                
                ContentDialog viewNotSupportedDialog = new ContentDialog()
                {
                    Title = "Streetside is not supported",
                    Content = "\nStreetside views are not supported on this device.",
                    PrimaryButtonText = "OK"
                };
                await viewNotSupportedDialog.ShowAsync();
            }
        }

        async private void button_Click(object sender, RoutedEventArgs e)
        {
            LocationProvider providerLocation = new LocationProvider();

            var accessStatus = await Geolocator.RequestAccessAsync();

            switch (accessStatus)
            {
                case GeolocationAccessStatus.Allowed:

                    // If DesiredAccuracy or DesiredAccuracyInMeters are not set (or value is 0), DesiredAccuracy.Default is used.
                    Geolocator geolocator = new Geolocator { DesiredAccuracyInMeters = 2000 };

                    // Carry out the operation.
                    Geoposition pos = await geolocator.GetGeopositionAsync();
                    Geopoint geo = new Geopoint(new BasicGeoposition { Latitude = pos.Coordinate.Point.Position.Latitude, Longitude = pos.Coordinate.Point.Position.Longitude });

                    providerLocation.AddLocation(geo, 1);


                    this.Frame.Navigate(typeof(Friends), pos);

                    break;

                case GeolocationAccessStatus.Denied:

                    break;

                case GeolocationAccessStatus.Unspecified:

                    break;
            }

        }

        public static IEnumerable<PointList> GetRandomPoints(Geopoint point1, Geopoint point2, int nrOfPoints)
        {
            var result = new List<PointList>();
            var p1 = new BasicGeoposition
            {
                Latitude = Math.Min(point1.Position.Latitude, point2.Position.Latitude),
                Longitude = Math.Min(point1.Position.Longitude, point2.Position.Longitude)
            };
            var p2 = new BasicGeoposition
            {
                Latitude = Math.Max(point1.Position.Latitude, point2.Position.Latitude),
                Longitude = Math.Max(point1.Position.Longitude, point2.Position.Longitude)
            };

            var dLat = p2.Latitude - p1.Latitude;
            var dLon = p2.Longitude - p1.Longitude;

            var r = new Random(DateTime.Now.Millisecond);
            for (var i = 0; i < nrOfPoints; i++)
            {
                var item = new PointList { Name = "Point " + i };
                item.Points.Add(new Geopoint(
                  new BasicGeoposition
                  {
                      Latitude = p1.Latitude + (r.NextDouble() * dLat),
                      Longitude = p1.Longitude + (r.NextDouble() * dLon)
                  }));
                result.Add(item);
            }
            return result;
        }

		/// <summary>
		/// Invoked when this page is about to be displayed in a Frame.
		/// </summary>
		/// <param name="e">Event data that describes how this page was reached.
		/// This parameter is typically used to configure the page.</param>
		protected async override void OnNavigatedTo(NavigationEventArgs e)
		{
			Geopoint myPoint;

			if (e.Parameter == null)
			{
				//Add
				isViewing = false;

				var locator = new Geolocator();
				locator.DesiredAccuracyInMeters = 50;

				// MUST ENABLE THE LOCATION CAPABILITY!!
				var position = await locator.GetGeopositionAsync();
				myPoint = position.Coordinate.Point;
			}
			else
			{
				//View or Delete
				isViewing = true;

				lifeThread = (LifeThread)e.Parameter;
				titleTextBox.Text = lifeThread.Title;
				noteTextBox.Text = lifeThread.Thread;
				addButton.Content = "Delete";

				var myPosition = new Windows.Devices.Geolocation.BasicGeoposition();
				myPosition.Latitude = lifeThread.Latitude;
				myPosition.Longitude = lifeThread.Longitude;

				myPoint = new Geopoint(myPosition);
			}

			await MyMap.TrySetViewAsync(myPoint, 16d);
		}

        public static bool Contains(List<Geopoint> polyPoints, Geopoint point)
        {
            bool inside = false;
            Geopoint p1, p2;

            //iterate each side of the polygon
            Geopoint oldPoint = polyPoints[polyPoints.Count - 1];

            foreach (Geopoint newPoint in polyPoints)
            {
                //order points so p1.lat <= p2.lat;
                if (newPoint.Position.Latitude > oldPoint.Position.Latitude)
                {
                    p1 = oldPoint;
                    p2 = newPoint;
                }
                else
                {
                    p1 = newPoint;
                    p2 = oldPoint;
                }

                //test if the line is crossed and if so invert the inside flag.
                if ((newPoint.Position.Latitude < point.Position.Latitude) == (point.Position.Latitude <= oldPoint.Position.Latitude)
                    && (point.Position.Longitude - p1.Position.Longitude) * (p2.Position.Latitude - p1.Position.Latitude)
                     < (p2.Position.Longitude - p1.Position.Longitude) * (point.Position.Latitude - p1.Position.Latitude))
                {
                    inside = !inside;
                }

                oldPoint = newPoint;
            }

            return inside;
        }

        public MapView()
        {

            mapControl = new MapControl();
            mapControl.ZoomInteractionMode = MapInteractionMode.GestureAndControl;
            mapControl.TiltInteractionMode = MapInteractionMode.GestureAndControl;
            mapControl.MapServiceToken = "ift37edNFjWtwMkOrquL~7gzuj1f0EWpVbWWsBaVKtA~Amh-DIg5R0ZPETQo7V-k2m785NG8XugPBOh52EElcvxaioPYSYWXf96wL6E_0W1g";

            // Specify a known location
            BasicGeoposition cityPosition;
            Geopoint cityCenter;

            cityPosition = new BasicGeoposition() { Latitude = 2.4448143, Longitude = -76.6147395 };
            cityCenter = new Geopoint(cityPosition);

            // Set map location
            mapControl.Center = cityCenter;
            mapControl.ZoomLevel = 13.0f;
            mapControl.LandmarksVisible = true;

            AddIcons();

            this.Children.Add(mapControl);


            //this.Children.Add(_map);
        }

        public void addPinsToMap(MapControl mapControl, Action<MapPin> tappedCallback = null)
        {
            removePinsFromMap(mapControl);
            m_mapPins = new List<MapPin>();

            int i = 1;
            DB_station prevStation = null;
            foreach (List<DB_station> route in m_routes)
            {
                foreach(DB_station station in route)
                {
                    if (station == prevStation || (station.latitude == 0f && station.longitude == 0f))
                        continue;

                    // Title for station.
                    string title = "Przystanek " + (i++) + "\n" + station.post_id + " " + station.post_name + "\n" + station.street;

                    // Add pin into map.
                    var location = new Geopoint(new BasicGeoposition()
                    {
                        Latitude = station.latitude,
                        Longitude = station.longitude
                    });
                    MapPin pin = new MapPin(title, station, MapPin.PinType.RegularPin, MapPin.PinSize.Small, tappedCallback);
                    pin.addToMap(mapControl, location);
                    m_mapPins.Add(pin);
                    prevStation = station;
                }
            }
        }

 private async void handleResults(PhotoCollection results, ObservableCollection<ThumbnailImage> List)
 {
     foreach (var res in results)
     {
         Geopoint point = null;
         if (res.Longitude != 0 && res.Latitude != 0)
         {
             var position = new BasicGeoposition()
             {
                 Latitude = res.Latitude,
                 Longitude = res.Longitude
             };
             point = new Geopoint(position);
         }
         else if (res.Tags.Contains("cars"))
         {
             var position = new BasicGeoposition()
             {
                 Longitude = 13.416350,
                 Latitude = 52.526105
             };
             point = new Geopoint(position);
         }
         List.Add(new ThumbnailImage() { ImagePath = new Uri(res.ThumbnailUrl), ImageTitle = res.Title, BigImage = new Uri(res.LargeUrl), GeoLocation = point });
     }
 }

        public AddMapa()
        {
            this.InitializeComponent();

            rootFrame = Window.Current.Content as Frame;

            SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility
                    = AppViewBackButtonVisibility.Visible;

            SystemNavigationManager.GetForCurrentView().BackRequested += AddMapa_BackRequested;

            mapControl.ZoomInteractionMode = MapInteractionMode.GestureAndControl;
            mapControl.TiltInteractionMode = MapInteractionMode.GestureAndControl;
            mapControl.MapServiceToken = "ift37edNFjWtwMkOrquL~7gzuj1f0EWpVbWWsBaVKtA~Amh-DIg5R0ZPETQo7V-k2m785NG8XugPBOh52EElcvxaioPYSYWXf96wL6E_0W1g";

            // Specify a known location

            BasicGeoposition posicion = new BasicGeoposition() { Latitude = 2.4448143, Longitude = -76.6147395 };
            Geopoint point = new Geopoint(posicion);

            // Set map location
            mapControl.Center = point;
            mapControl.ZoomLevel = 13.0f;
            mapControl.LandmarksVisible = true;

            AddIcons();

            //GridMapa.Children.Add(mapControl);

        }