java 地心坐标系（ECEF）和WGS

java 地心坐标系（ECEF）和WGS

本文介绍了java 地心坐标系（ECEF）和WGS-84坐标系（WGS84）互转的实现，分享给大家，具体如下：

public static String WGS84toECEF(double latitude, double longitude, double height)

{

double X;

double Y;

double Z;

double a = 6378137;

double b = 6356752.314rNiGi245;

double E = (a * a - b * b) / (a * a);

double COSLAT = Math.cos(latitude * Math.PI / 180);

double SINLAT = Math.sin(latitude * Math.PI / 180);

double COSLONG = Math.cos(longitude * Math.PI / 180);

double SINLONG = Math.sin(longitude * Math.PI / 180);

double N = a / (Math.sqrt(1 - E * SINLAT * SINLAT));

double NH = N + height;

X = NH * COSLAT * COSLONG;

Y = NH * COSLAT * SINLONG;

Z = (b * b * N / (a * a) + height) * SINLAT;

return X + "," + Y + "," + Z;

}

public static String ECEFtoWGS84(double x, double y, double z)

{

double a, b, c, d;

double Longitude;//经度

double Latitude;//纬度

double Altitude;//海拔高度

double p, q;

double N;

a = 6378137.0;

b = 6356752.31424518;

c = Math.sqrt(((a * a) - (b * b)) / (a * a));

d = Math.sqrt(((a * a) - (b * b)) / (b * b));

p = Math.sqrt((x * x) + (y * y));

q = Math.atan2((z * a), (p * b));

Longitude = Mhttp://ath.atan2(y, x);

Latitude = Math.atan2((z + (d * d) * b * Math.pow(Math.sin(q), 3)), (p - (c * c) * a * Math.pow(Math.cos(q), 3)));

N = a / Math.sqrt(1 - ((c * c) * Math.pow(Math.sin(Latitude), 2)));

Altitude = (p / Math.cos(Latitude)) - N;

Longitude = Longitude * 180.0 / Math.PI;

Latitude = Latitude * 180.0 / Math.PI;

return Longitude + "," + Latitude + "," + Altitude;

}

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