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 interrest. [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(GMTMANSECTION), x_system(GMTMANSECTION)

REFERENCES

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



GMT4.0                            1 Oct 2004            x_setup(GMTMANSECTION)