2 #define EQUATOR_RADIUS 6378137.0
3 #define POLE_RADIUS 6356752.314
5 #define PI 3.1415926536
7 void geo2space(double *x, double *y, double *z, double lat, double lon);
8 void space2geo(double *lat, double *lon, double x, double y, double z);
9 double distinspace(double x1, double y1, double z1, double x2, double y2,
11 double distonplane(double x1, double y1, double x2, double y2);