百度坐标和火星坐标的转换

//百度转火星坐标

+ (CLLocationCoordinate2D )bdToGGEncrypt:(CLLocationCoordinate2D)coord

{

double x = coord.longitude - 0.0065, y = coord.latitude - 0.006;

double z = sqrt(x * x + y * y) - 0.00002 * sin(y * M_PI);

double theta = atan2(y, x) - 0.000003 * cos(x * M_PI);

CLLocationCoordinate2D transformLocation ;

transformLocation.longitude = z * cos(theta);

transformLocation.latitude = z * sin(theta);

return transformLocation;

}

//火星坐标转百度坐标

+ (CLLocationCoordinate2D )ggToBDEncrypt:(CLLocationCoordinate2D)coord

{

double x = coord.longitude, y = coord.latitude;

double z = sqrt(x * x + y * y) + 0.00002 * sin(y * M_PI);

double theta = atan2(y, x) + 0.000003 * cos(x * M_PI);

CLLocationCoordinate2D transformLocation ;

transformLocation.longitude = z * cos(theta) + 0.0065;

transformLocation.latitude = z * sin(theta) + 0.006;

return transformLocation;

}