坐标转换C#(Gcj02、wgs84、bd09互转)
作者：互联网
public class ConvertGPS
{
private static double pi = 3.1415926535897932384626;
private static double a = 6378245.0;
private static double ee = 0.00669342162296594323;
private static double bd_pi = 3.14159265358979324 * 3000.0 / 180.0;
static Boolean 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;
}
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;
}
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;
}
/**
* 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
*
* @param lat
* @param lon
* @return
*/
public static PointLatLng gps84_To_Gcj02(PointLatLng Gpoint)
{
if (outOfChina(Gpoint.Lat, Gpoint.Lng))
{
return new PointLatLng(0, 0);
}
double dLat = transformLat(Gpoint.Lng - 105.0, Gpoint.Lat - 35.0);
double dLon = transformLon(Gpoint.Lng - 105.0, Gpoint.Lat - 35.0);
double radLat = Gpoint.Lat / 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 mgLat = Gpoint.Lat + dLat;
double mgLon = Gpoint.Lng + dLon;
return new PointLatLng(mgLat, mgLon);
}
static PointLatLng transform(PointLatLng Gpoint)
{
if (outOfChina(Gpoint.Lat, Gpoint.Lng))
{
return new PointLatLng(Gpoint.Lat, Gpoint.Lng);
}
double dLat = transformLat(Gpoint.Lng - 105.0, Gpoint.Lat - 35.0);
double dLon = transformLon(Gpoint.Lng - 105.0, Gpoint.Lat - 35.0);
double radLat = Gpoint.Lat / 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 mgLat = Gpoint.Lat + dLat;
double mgLon = Gpoint.Lng + dLon;
return new PointLatLng(mgLat, mgLon);
}
/**
* * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
* */
public static PointLatLng gcj02_To_Gps84(PointLatLng Gpoint)
{
PointLatLng gps = transform(Gpoint);
double lontitude = Gpoint.Lng * 2 - gps.Lng;
double latitude = Gpoint.Lat * 2 - gps.Lat;
return new PointLatLng(latitude, lontitude);
}
/**
* 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
*
* @param gg_lat
* @param gg_lon
*/
public static PointLatLng gcj02_To_Bd09(PointLatLng Gpoint)
{
double x = Gpoint.Lng, y = Gpoint.Lat;
double z = Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * bd_pi);
double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * bd_pi);
double bd_lon = z * Math.Cos(theta) + 0.0065;
double bd_lat = z * Math.Sin(theta) + 0.006;
return new PointLatLng(bd_lat, bd_lon);
}
/**
* * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param
* bd_lat * @param bd_lon * @return
*/
public static PointLatLng bd09_To_Gcj02(PointLatLng bdPoint)
{
double x = bdPoint.Lng - 0.0065, y = bdPoint.Lat - 0.006;
double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * bd_pi);
double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * bd_pi);
double gg_lon = z * Math.Cos(theta);
double gg_lat = z * Math.Sin(theta);
return new PointLatLng(gg_lat, gg_lon);
}
/**
* (BD-09)-->84
* @param bd_lat
* @param bd_lon
* @return
*/
public static PointLatLng bd09_To_Gps84(PointLatLng bdPoint)
{
PointLatLng gcj02 = bd09_To_Gcj02(bdPoint);
PointLatLng map84 = gcj02_To_Gps84(gcj02);
return map84;
}
/**
* 84-->(BD-09)
* @param bd_lat
* @param bd_lon
* @return
*/
public static PointLatLng Gps84_To_bd09(PointLatLng gpsPoint)
{
PointLatLng gcj02 = gps84_To_Gcj02(gpsPoint);
PointLatLng bd09 = gcj02_To_Bd09(gcj02);
return bd09;
}
}
public class PointLatLng
{
public PointLatLng(double lat, double lng)
{
Lat = lat;
Lng = lng;
}
public double Lat { get; set; }
public double Lng { get; set; }
}
原文地址：https://blog.csdn.net/qq_35119964/article/details/83061271
标签：wgs84,C#,double,Gpoint,PointLatLng,互转,return,pi,Math 来源： https://www.cnblogs.com/wxxf/p/14820773.html