<UserControl x:Class="GoogleMap.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:esri="http://schemas.esri.com/arcgis/client/2009"
xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"
xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"
xmlns:layer="clr-namespace:GoogleMap.CommonClass"
d:DesignHeight="300" d:DesignWidth="400" Loaded="UserControl_Loaded">
<Grid x:Name="LayoutRoot" Background="White">
<esri:Map x:Name="myMap" IsLogoVisible="False" ZoomDuration="0:00:02" PanDuration="0:00:02">
</esri:Map>
</Grid>
</UserControl>
3、Silverlight项目中的MainPage.xaml.cs文件内容如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using TestDZX.CommonClass;
using ESRI.ArcGIS.Client.Geometry;
using ESRI.ArcGIS.Client;
namespace GoogleMap
{
public partial class MainPage: UserControl
{
ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
public MainPage()
{
InitializeComponent();
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
GoogleTopographicLayerlayer = new GoogleTopographicLayer();
myMap.Layers.Add(layer);
}
}
}
4、完成以上步骤后，运行，可以看见Google地形图了，just try it，have fun！
5、补充：这里使用的是墨卡托坐标，而我们经常使用的是经纬度坐标，这就需要做转换，下面提供一个类，WKIDConvert.cs，内容
如下：
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using ESRI.ArcGIS.Client.Geometry;
namespace GoogleMap.CommonClass
{
public static class WKIDConvert
{
//经纬度转墨卡托
public static MapPoint lonlat2mercator(MapPoint lonlat)
{
MapPoint mercator = new MapPoint();
double X = lonlat.X * 20037508.34 / 180;
double Y = Math.Log(Math.Tan((90 + lonlat.Y) * Math.PI / 360)) / (Math.PI / 180);
Y = Y * 20037508.34 / 180;
mercator.X = X;
mercator.Y = Y;
return mercator;
}
//墨卡托转经纬度
public static MapPoint mercator2lonlat(MapPoint mercator)
{
MapPoint lonlat = new MapPoint();
double X = mercator.X / 20037508.34 * 180;
double Y = mercator.Y / 20037508.34 * 180;
Y = 180 / Math.PI * (2 * Math.Atan(Math.Exp(Y * Math.PI / 180)) - Math.PI / 2);
lonlat.X = X;
lonlat.Y = Y;
return lonlat;
}
}
}
然后我们如果要定位到某个城市的话，比如黄山市，其Extent为：117.647738815324,29.4704217183843,118.446182957997,30.4124245048916
我们这里为MainPage.xaml.cs中添加一行代码即可定位到黄山市范围
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
GoogleTopographicLayer layer = new GoogleTopographicLayer();
myMap.Layers.Add(layer);
myMap.Extent = new Envelope(WKIDConvert.lonlat2mercator(new MapPoint(117.647738815324, 29.4704217183843)), WKIDConvert.lonlat2mercator(new MapPoint(118.446182957997, 30.4124245048916)));
}
6、再次补充：在之前的Google地形图上叠加自定义ArcMap地图，可以是动态图也可以是静态图，只要加上发布的地图，即可显示，在MainPage.xaml.cs中添加如下几行代码即可。
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
//叠加Google地形图瓦片
GoogleTopographicLayer layer = new GoogleTopographicLayer();
myMap.Layers.Add(layer);
layer.Opacity = 1;
//加载动态图
ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer dLayer = new ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer();
myMap.Layers.LayersInitialized += (evtsender, args) =>
{
myMap.ZoomTo(dLayer.InitialExtent);
};
dLayer.Url = "http://localhost/arcgis/rest/services/HS/MapServer/";
myMap.Layers.Add(dLayer);
dLayer.Opacity = 1;
myMap.Extent = new Envelope(WKIDConvert.lonlat2mercator(new MapPoint(117.647738815324, 29.4704217183843)), WKIDConvert.lonlat2mercator(new MapPoint(118.446182957997, 30.4124245048916)));
}
效果图如下，这里只是做了黄山市的市界边线，主要作用就是在Google地形图上明显看出黄山市的范围：