struct fgBUCKET ne_index, nw_index, sw_index, se_index;
struct fgBUCKET north_index, south_index, east_index, west_index;
/* convert a geodetic point lon(arcsec), lat(arcsec), elev(meter) to
* a cartesian point */
struct fgBUCKET ne_index, nw_index, sw_index, se_index;
struct fgBUCKET north_index, south_index, east_index, west_index;
/* convert a geodetic point lon(arcsec), lat(arcsec), elev(meter) to
* a cartesian point */