前几天做项目用到, 代码贴给大家。
/// <summary> /// 获取当前位置的经纬度
/// </summary>
/// <returns></returns>
public
static double[] GetLocationProperty()
{
double[] latLong = new
double[2];
GeoCoordinateWatcher watcher = new
GeoCoordinateWatcher();
watcher.TryStart(false,TimeSpan.FromMilliseconds(1000));
GeoCoordinate coord = watcher.Position.Location;
if
(coord.IsUnknown != true)
{
latLong[0] = coord.Latitude;
latLong[1] = coord.Longitude;
}
return
latLong;
}
#region 两个经纬度之差求的距离
private
const double EARTH_RADIUS = 6378.137;
private
static double rad(double
d)
{
return
d * Math.PI / 180.0;
}
public
static double GetDistance(double
lat1, double
lng1, double
lat2, double
lng2)
{
double
radLat1 = rad(lat1);
double
radLat2 = rad(lat2);
double
a = radLat1 - radLat2;
double
b = rad(lng1) - rad(lng2);
double
s = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(a / 2), 2) +
Math.Cos(radLat1) * Math.Cos(radLat2) * Math.Pow(Math.Sin(b / 2), 2)));
s = s * EARTH_RADIUS;
s = Math.Round(s * 10000) / 10000;
return
s;
}
#endregion
//URL接口来自诺基亚地图public
static Uri Get_CityNameOnMap(double
slatitude, double
slongitude)
{
string
urlString = "http://loc.desktop.maps.svc.ovi.com/geocoder/rgc/1.0?"
+ "lat="
+ slatitude + "&long="
+ slongitude + "&output=json";
return
new Uri(urlString, UriKind.RelativeOrAbsolute);
}
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