wgs84:国家默认标准坐标

/gcj02:火星坐标

/bd09:百度坐标

转换方法:

Gps实体

public class Gps {

public double wgLat;

public double wgLon;

public Gps(double wgLat, double wgLon) {

setWgLat(wgLat);

setWgLon(wgLon);

}

public double getWgLat() {

return wgLat;

}

public void setWgLat(double wgLat) {

this.wgLat = wgLat;

}

public double getWgLon() {

return wgLon;

}

public void setWgLon(double wgLon) {

this.wgLon = wgLon;

}

@Override

public String toString() {

return wgLat + "," + wgLon;

}

}

经纬度转换

public class PositionUtil {

//转换火星坐标密钥

public double pi = 3.1415926535897932384626;

public double a = 6378245.0;

public double ee = 0.00669342162296594323;

/**

* 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System

*

* @param lat

* @param lon

* @return

*/

public Gps gps84_To_Gcj02(double lat, double lon) {

if (outOfChina(lat, lon)) {

return null;

}

double dLat = transformLat(lon - 105.0, lat - 35.0);

double dLon = transformLon(lon - 105.0, lat - 35.0);

double radLat = 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 = lat + dLat;

double mgLon = lon + dLon;

return new Gps(mgLat, mgLon);

}

public 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;

}

public 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;

}

public 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;

}

}