NAME

       x_setup - Determine Pairs of Legs that need Cross-Over Checking

SYNOPSIS

       x_setup [ -Llegfile ] [ -Rwest/east/south/north ]

DESCRIPTION

       x_setup scans the gmtindex.b file that contains information on which legs occupy each 1 by
       1 degree bin and reports all the pairs of  legs  that  may  overlap.  Each  pair  is  only
       reported once, even if the two legs involved are found in other bins also.

       -L     Only report pairs where at least one of the legs are present in the legfile.

       -R     The region of interest.  [Default is world]

BEWARE

       The -L option is useful when one wants to check out a handful of new cruises. Obviously we
       only need to compute COEs for the pairs that involve one or two of the new cruises,  since
       all the other combinations have already been done.

SEE ALSO

       GMT(1), x_system(1)

REFERENCES

       Wessel, P. XOVER: A Cross-over Error Detector for Track Data, Computers & Geosciences, 15,
       333-346.