위경도 두점 사이의 거리 각도 계산

signed long double Distance = acos(sin(dLat1)*sin(dLat2) + cos(dLat1)*cos(dLat2)*cos(dLon1 - dLon2));
signed long double Degree = acos((sin(dLat2)-sin(dLat1)*cos(Distance))/(cos(dLat1)*sin(Distance)))*(180/3.141592);