- (CLLocationCoordinate2D)hhTrans_GCGPS:(CLLocationCoordinate2D)baiduGps
{
const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
CLLocationCoordinate2D googleGps;
double bd_x=baiduGps.longitude - 0.0065;
double bd_y=baiduGps.latitude - 0.006;
double z = sqrt(bd_x * bd_x + bd_y * bd_y) - 0.00002 * sin(bd_y * x_pi);
double theta = atan2(bd_y, bd_x) - 0.000003 * cos(bd_x * x_pi);
googleGps.longitude = z * cos(theta);
googleGps.latitude = z * sin(theta);
return googleGps;
}