【高德地图API】地理编码与逆地理编码

一、地理编码

该功能实现地理编码服务，即地址匹配，从已知的地址描述到对应的经纬度坐标的转换，即根据地址信息，查询该地址所对应的点坐标等，地址(address) 为必选项，城市(city)为可选项。

        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Grid Opacity="0.8"  Margin="0,0,0,608"  Background="#FF323232"  RenderTransformOrigin="0.497,0.465" Canvas.ZIndex="10" >
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
                <TextBlock Grid.Row="0" Text="地理编码" Margin="3,0,0,0" />
                <StackPanel Grid.Row="1"  Orientation="Vertical">
                    <TextBox x:Name="txtAddress" Grid.Row="0" Text="北京市朝阳区望京阜通东大街方恒国际中心" Margin="12,0,0,0" />
                    <Button   Content="地理编码" Click="Button_Click" Margin="274,0,26,0"  />
                </StackPanel>
            </Grid>
        </Grid>

        AMap amap;
        AMapMarker marker;
        public SearchGeoCode()
        {
            InitializeComponent();
            this.ContentPanel.Children.Add(amap = new AMap());
            amap.MarkerClickListener += amap_MarkerClickListener;
          
        }

        private async Task AddressToGeoCode(string address)
        {
            AMapGeoCodeResult cr = await AMapGeoCodeSearch.AddressToGeoCode(address);
            this.Dispatcher.BeginInvoke(() =>
            {
                if (cr.Erro == null && cr.GeoCodeList != null)
                {
                    if (cr.GeoCodeList.Count==0)
                    {
                        MessageBox.Show("无查询结果");
                        return;
                    }
                    IEnumerable<AMapGeoCode> geocode = cr.GeoCodeList;
                    foreach (AMapGeoCode gcs in geocode)
                    {
                        Debug.WriteLine(gcs.Adcode);
                        Debug.WriteLine(gcs.Building);
                        Debug.WriteLine(gcs.City);
                        Debug.WriteLine(gcs.District);
                        Debug.WriteLine(gcs.FormattedAddress);
                        Debug.WriteLine(gcs.Province);
                        Debug.WriteLine(gcs.Township);
                        Debug.WriteLine(gcs.Location.Lon);
                        Debug.WriteLine(gcs.Location.Lat);
                        Debug.WriteLine(gcs.LevelList[0]);
                        marker= amap.AddMarker(new AMapMarkerOptions()
                        {
                            Position = new LatLng(gcs.Location.Lat, gcs.Location.Lon),
                            Title = gcs.FormattedAddress,
                            Snippet = gcs.District,
                            IconUri = new Uri("Images/AZURE.png", UriKind.Relative),

                        });
                    }
                    //如果返回的geocode数大于1个，调整视图
                    if (geocode.Count()>1)
                    {
                        LatLngBounds.Builder builder = new LatLngBounds.Builder();
                        List<AMapMarker> markers = amap.GetMapMarkers();
                        foreach (AMapMarker marker in markers)
                        {
                            builder.Include(marker.Position);
                        }
                        this.amap.MoveCamera(CameraUpdateFactory.NewLatLngBounds(builder.Build(), markers.Count()));
                    }
                    else
                    {
                        amap.MoveCamera(CameraUpdateFactory.NewLatLngZoom(new LatLng(geocode.FirstOrDefault().Location.Lat, geocode.FirstOrDefault().Location.Lon), 14));
                    }
                }
                else
                {
                    MessageBox.Show(cr.Erro.Message);
                }

            });
        }

        void amap_MarkerClickListener(AMapMarker sender, AMapEventArgs args)
        {
            sender.ShowInfoWindow(new AInfoWindow()
            {
                Title = sender.Title,
                ContentText =sender.Snippet,
            });
        }

        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            amap.Clear();
            if (!string.IsNullOrWhiteSpace(txtAddress.Text))
            {
                await AddressToGeoCode(txtAddress.Text);
            }
            
        }        

二、逆地理编码

该功能实现逆地理编码服务，即地址解析服务，具体是指从已知的经纬度坐标到对应的地址描述（如省市、街区、楼层、房间等）的转换服务，坐标(location) 为必选项，半径(radius)为可选项，详细的参数说明参见参考手册。

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Grid Opacity="0.8" Margin="0,0,0,568"  Background="#FF323232"  RenderTransformOrigin="0.497,0.465" Canvas.ZIndex="10" >
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
                <TextBlock Grid.Row="0" Text="逆地理编码" Margin="3,0,0,0" />
              
                    <Grid  Grid.Row="1">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Grid.Column="0" Text="经度：" Margin="12,0,0,0" VerticalAlignment="Center" />
                    <TextBlock Grid.Row="1" Grid.Column="0" Text="纬度：" Margin="12,0,0,0" VerticalAlignment="Center" />
                    <TextBox x:Name="txtLon" Grid.Row="0" Grid.Column="1" Text="" Width="180" />
                    <TextBox x:Name="txtLat" Grid.Row="1" Grid.Column="1" Text="" Width="180" />
                    <TextBlock  Grid.Row="2" Text="点击或者输入获得经纬度" Grid.ColumnSpan="2" Margin="3,0,0,0" />
                </Grid>
                    <Button   Content="逆地理编码" Click="Button_Click" Margin="257,69,29,3" Grid.Row="1"  />
             
            </Grid>

        AMap amap;
        AMapMarker marker;
        LatLng latLng;
        public SearchReGeoCode()
        {
            InitializeComponent();
            this.ContentPanel.Children.Add(amap = new AMap());
            amap.Tap += amap_Tap;
            amap.MarkerClickListener += amap_MarkerClickListener;

        }

        void amap_Tap(object sender, System.Windows.Input.GestureEventArgs e)
        {
            latLng = amap.GetProjection().FromScreenLocation(e.GetPosition(amap));
            this.txtLat.Text = latLng.latitude.ToString();
            this.txtLon.Text = latLng.longitude.ToString();
        }

        private async Task GeoCodeToAddress(double lon, double lat)
        {
            AMapReGeoCodeResult rcc = await AMapReGeoCodeSearch.GeoCodeToAddress(lon, lat, 500, "", Extensions.All);

            this.Dispatcher.BeginInvoke(() =>
                {
                    if (rcc.Erro == null && rcc.ReGeoCode != null)
                    {
                        AMapReGeoCode regeocode = rcc.ReGeoCode;
                        Debug.WriteLine(regeocode.Address_component);
                        Debug.WriteLine(regeocode.Formatted_address);
                        Debug.WriteLine(regeocode.Pois);

                        List<AMapPOI> pois = regeocode.Pois.ToList();
                        //POI信息点
                        foreach (AMapPOI poi in pois)
                        {
                            marker = amap.AddMarker(new AMapMarkerOptions()
                            {
                                Position = new LatLng(poi.Location.Lat, poi.Location.Lon),
                                Title = poi.Name,
                                Snippet = poi.Address,
                                IconUri = new Uri("Images/RED.png", UriKind.Relative),

                            });
                        }

                        Debug.WriteLine(regeocode.Roadinters);
                        Debug.WriteLine(regeocode.Roadslist);
                        AMapAddressComponent addressComponent = regeocode.Address_component;
                        Debug.WriteLine(addressComponent.Building);
                        Debug.WriteLine(addressComponent.City);
                        Debug.WriteLine(addressComponent.District);
                        Debug.WriteLine(addressComponent.Neighborhood);
                        Debug.WriteLine(addressComponent.Province);
                        Debug.WriteLine(addressComponent.Stree_number);
                        Debug.WriteLine(addressComponent.Township);
                        AMapStreetNumber streetNumber = addressComponent.Stree_number;
                        Debug.WriteLine(streetNumber.Direction);
                        Debug.WriteLine(streetNumber.Distance);
                        Debug.WriteLine(streetNumber.Location.Lat);
                        Debug.WriteLine(streetNumber.Location.Lon);
                        Debug.WriteLine(streetNumber.Number);
                        Debug.WriteLine(streetNumber.Street);


                        marker = amap.AddMarker(new AMapMarkerOptions()
                          {
                              Position = new LatLng(streetNumber.Location.Lat, streetNumber.Location.Lon),//amap.Center,//
                              Title = addressComponent.Province,
                              Snippet = regeocode.Formatted_address,
                              IconUri = new Uri("Images/AZURE.png", UriKind.Relative),

                          });

                        //显示化弹出信息
                        AInfoWindow info = new AInfoWindow();
                        info.Title = addressComponent.Province;
                        info.ContentText = regeocode.Formatted_address;
                        marker.ShowInfoWindow(info, new Point(0, 0));

                        amap.MoveCamera(CameraUpdateFactory.NewLatLngZoom(new LatLng(Convert.ToDouble(txtLon.Text), Convert.ToDouble(txtLat.Text)), 12));
                    }
                    else
                    {
                        MessageBox.Show(rcc.Erro.Message);
                    }

                });

        }

        void amap_MarkerClickListener(AMapMarker sender, AMapEventArgs args)
        {
            sender.ShowInfoWindow(new AInfoWindow()
            {
                Title = sender.Title,
                ContentText = sender.Snippet,
            });
        }

        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            amap.Clear();
            if (string.IsNullOrWhiteSpace(txtLat.Text) && string.IsNullOrWhiteSpace(txtLon.Text))
            {
                return;
            }
            await GeoCodeToAddress(Convert.ToDouble(txtLon.Text), Convert.ToDouble(txtLat.Text));
        }    

三、同时使用地理编码和逆地理编码

已知一个地址或者模糊地址，然后你想知道该地址详细信息或者周边信息（周边POI点）。先通过地址获取经纬度，然后通过逆地理编码获取详细信息。在此不作出示例。

四、批量逆地理编码

目前高德地图WP SDK中并没有提供直接批量转换的接口，而在REST API中已经提供了，你可以在开发者论坛REST API版块中提出接口使用申请，链接：高德地图rest api接口申请方式