GPS、高德坐标系互转，高德、百度坐标系互转。。。
后面有我自己随便写写，但是可以用的成品demo，已经开源
先直接上干活，转换的类
public class GPSChange
{
private const double pi = 3.14159265358979324;
private const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
//克拉索天斯基椭球体参数值
private const double a = 6378245.0;
//第一偏心率
private const double ee = 0.00669342162296594323;
/// <summary>
/// GCJ-02转换BD-09
/// </summary>
/// <param name="gg_lat">纬度</param>
/// <param name="gg_lon">经度</param>
/// <returns></returns>
public static CoordinatesHelper GCJ02_to_BD09(double gg_lat, double gg_lon)
{
CoordinatesHelper point = new CoordinatesHelper();
double x = gg_lon, y = gg_lat;
double z = Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * x_pi);
double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * x_pi);
double bd_lon = z * Math.Cos(theta) + 0.0065;
double bd_lat = z * Math.Sin(theta) + 0.006;
point.SetLat(bd_lat);
point.SetLng(bd_lon);
return point;
}
/// <summary>
/// BD-09转换GCJ-02
/// </summary>
/// <param name="bd_lat">纬度</param>
/// <param name="bd_lon">经度</param>
/// <returns></returns>
public static CoordinatesHelper BD09_to_GCJ02(double bd_lat, double bd_lon)
{
CoordinatesHelper point = new CoordinatesHelper();
double x = bd_lon - 0.0065, y = bd_lat - 0.006;
double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * pi);
double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * pi);
double gg_lon = z * Math.Cos(theta);
double gg_lat = z * Math.Sin(theta);
point.SetLat(gg_lat);
point.SetLng(gg_lon);
return point;
}
/// <summary>
/// WGS-84转换GCJ-02 GPS转高德
/// </summary>
/// <param name="wgLat">纬度</param>
/// <param name="wgLon">经度</param>
/// <returns></returns>
public static CoordinatesHelper WGS84_to_GCJ02(double wgLat, double wgLon)
{
CoordinatesHelper point = new CoordinatesHelper();
if (OutOfChina(wgLat, wgLon))
{
point.SetLat(wgLat);
point.SetLng(wgLon);
return point;
}
double dLat = TransformLat(wgLon - 105.0, wgLat - 35.0);
double dLon = TransformLon(wgLon - 105.0, wgLat - 35.0);
double radLat = wgLat / 180.0 * pi;
double magic = Math.Sin(radLat);
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.Sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.Cos(radLat) * pi);
double lat = wgLat + dLat;
double lon = wgLon + dLon;
point.SetLat(lat);
point.SetLng(lon);
return point;
}
/// <summary>
/// 高德转GPS
/// </summary>
/// <param name="wgLat"></param>
/// <param name="wgLon"></param>
/// <returns></returns>
public static CoordinatesHelper GCJ02_to_WGS84(double wgLat, double wgLon)
{
CoordinatesHelper point = new CoordinatesHelper();
if (OutOfChina(wgLat, wgLon))
{
point.SetLat(wgLat);
point.SetLng(wgLon);
return point;
}
var a = 6378245.0; // a: 卫星椭球坐标投影到平面地图坐标系的投影因子。
var ee = 0.00669342162296594323; // ee: 椭球的偏心率。
var lat = +wgLat;
var lng = +wgLon;
var dlat = transformLat(lng - 105.0, lat - 35.0);
var dlng = transformLon(lng - 105.0, lat - 35.0);
var radlat = lat / 180.0 * PI;
var magic = Math.Sin(radlat);
magic = 1 - ee * magic * magic;
var sqrtmagic = Math.Sqrt(magic);
dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * PI);
dlng = (dlng * 180.0) / (a / sqrtmagic * Math.Cos(radlat) * PI);
var mglat = lat + dlat;
var mglng = lng + dlng;
point.SetLat(lat * 2 - mglat);
point.SetLng(lng * 2 - mglng);
return point;
}
public static CoordinatesHelper WGS84_to_BD09(double wgLat, double wgLon)
{
//先转GCJ-02
CoordinatesHelper point = new CoordinatesHelper();
var info = WGS84_to_GCJ02(wgLat, wgLon);
double lat = info.GetLat();
double lon = info.GetLng();
//第二次转
return GCJ02_to_BD09(lat, lon);
}
public static CoordinatesHelper BD09_to_WGS84(double wgLat, double wgLon)
{
double x = wgLon - 0.0065, y = wgLat - 0.006;
double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * pi);
double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * pi);
double gg_lon = z * Math.Cos(theta);
double gg_lat = z * Math.Sin(theta);
//先转GCJ-02
CoordinatesHelper point = new CoordinatesHelper();
return GCJ02_to_WGS84(gg_lat, gg_lon);
}
public static double PI = 3.14159265358979324;
public static double transformLat(double x, double y)
{
var ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.Sqrt(Math.Abs(x));
ret += (20.0 * Math.Sin(6.0 * x * PI) + 20.0 * Math.Sin(2.0 * x * PI)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(y * PI) + 40.0 * Math.Sin(y / 3.0 * PI)) * 2.0 / 3.0;
ret += (160.0 * Math.Sin(y / 12.0 * PI) + 320 * Math.Sin(y * PI / 30.0)) * 2.0 / 3.0;
return ret;
}
public static double transformLon(double x, double y)
{
var ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.Sqrt(Math.Abs(x));
ret += (20.0 * Math.Sin(6.0 * x * PI) + 20.0 * Math.Sin(2.0 * x * PI)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(x * PI) + 40.0 * Math.Sin(x / 3.0 * PI)) * 2.0 / 3.0;
ret += (150.0 * Math.Sin(x / 12.0 * PI) + 300.0 * Math.Sin(x / 30.0 * PI)) * 2.0 / 3.0;
return ret;
}
public static void Transform(double wgLat, double wgLon, double[] latlng)
{
if (OutOfChina(wgLat, wgLon))
{
latlng[0] = wgLat;
latlng[1] = wgLon;
return;
}
double dLat = TransformLat(wgLon - 105.0, wgLat - 35.0);
double dLon = TransformLon(wgLon - 105.0, wgLat - 35.0);
double radLat = wgLat / 180.0 * pi;
double magic = Math.Sin(radLat);
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.Sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.Cos(radLat) * pi);
latlng[0] = wgLat + dLat;
latlng[1] = wgLon + dLon;
}
private static bool OutOfChina(double lat, double lon)
{
if (lon < 72.004 || lon > 137.8347)
return true;
if (lat < 0.8293 || lat > 55.8271)
return true;
return false;
}
private static double TransformLat(double x, double y)
{
double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.Sqrt(Math.Abs(x));
ret += (20.0 * Math.Sin(6.0 * x * pi) + 20.0 * Math.Sin(2.0 * x * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(y * pi) + 40.0 * Math.Sin(y / 3.0 * pi)) * 2.0 / 3.0;
ret += (160.0 * Math.Sin(y / 12.0 * pi) + 320 * Math.Sin(y * pi / 30.0)) * 2.0 / 3.0;
return ret;
}
private static double TransformLon(double x, double y)
{
double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.Sqrt(Math.Abs(x));
ret += (20.0 * Math.Sin(6.0 * x * pi) + 20.0 * Math.Sin(2.0 * x * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(x * pi) + 40.0 * Math.Sin(x / 3.0 * pi)) * 2.0 / 3.0;
ret += (150.0 * Math.Sin(x / 12.0 * pi) + 300.0 * Math.Sin(x / 30.0 * pi)) * 2.0 / 3.0;
return ret;
}
private const double EARTH_RADIUS = 6378.137;
private static double rad(double d)
{
return d * Math.PI / 180.0;
}
public static double GetDistance(double lng1, double lat1, double lng2, double lat2)
{
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;
}
}用法一看就懂，应该不需要我来说了吧
Github开源地址：https://github.com/Hmister/Coordinates.git
软件截图
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