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#include <iostream>
#include "math.h"

typedef signed int INT32;

namespace GEO {
        const double PI = 3.14159265359;
        const double PIOVER2 = PI/2.0;
        const double TWOPI = 6.28318530718;
        const double DE2RA = 0.01745329252;
        const double RA2DE = 57.2957795129;
        const double ERAD = 6378.137;
        const double FLATTENING = 1.000000/298.257223563;// Earth flattening (WGS84)
        const double EPS = 0.000000000005;
}

using namespace std;

class GeoCalc {
public:
          // great circle method
        static double GCAzimuth(double lat1, double lon1, double lat2, double lon2);

        // ellipsoid methods
        static double EllipsoidDistance(double lat1, double lon1, double lat2, double lon2);
};