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X2SYS_REPORT(1)              Generic Mapping Tools             X2SYS_REPORT(1)

NAME
       x2sys_report - Report statistics from crossover data base

SYNOPSIS
       x2sys_report -Ccolumn -TTAG [ coedbase.txt ] [ -A ] [ -I[list] ] [
       -L[corrtable] ] [ -Nnx_min ] [ -Qe|i ] [ -Rwest/east/south/north[r] ] [
       -Strack ] [ -V ]

DESCRIPTION
       x2sys_report will read the input crossover ASCII data base coedbase.txt
       (or stdin) and report on the statistics of crossovers (n, mean, stdev,
       rms, weight) for each track.  Options are available to let you exclude
       tracks and limit the output.

       -C     Specify which data column you want to process.  Crossovers
              related to this column name must be present in the crossover
              data base.

       -T     Specify the x2sys TAG which tracks the attributes of this data
              type.

OPTIONS
       No space between the option flag and the associated arguments.

       coedbase.txt
              The name of the input ASCII crossover error data base as
              produced by x2sys_cross.  If not given we read standard input
              instead.

       -A     Eliminate COEs by distributing the COE between the two tracks in
              proportion to track weight and producing (dist, adjustment)
              spline knots files for each track (for the selected column).
              Such adjustments may be used by x2sys_datalist.  The adjustment
              files are called track.column.adj and are placed in the
              $X2SYS_HOME/TAG directory. For background information on how
              these adjustments are designed, see Mittal [1984].

       -I     Name of ASCII file with a list of track names (one per record)
              that should be excluded from consideration [Default includes all
              tracks].

       -L     Apply optimal corrections to the chosen observable.  Append the
              correction table to use [Default uses the correction table
              TAG_corrections.txt which is expected to reside in the
              $X2SYS_HOME/TAG directory].  For the format of this file, see
              x2sys_solve.

       -N     Only report data from tracks involved in at least nx_min
              crossovers [all tracks].

       -Q     Append e for external crossovers or i for internal crossovers
              only [Default is external].

       -R     west, east, south, and north specify the Region of interest, and
              you may specify them in decimal degrees or in
              [+-]dd:mm[:ss.xxx][W|E|S|N] format.  Append r if lower left and
              upper right map coordinates are given instead of w/e/s/n.  The
              two shorthands -Rg and -Rd stand for global domain (0/360 and
              -180/+180 in longitude respectively, with -90/+90 in latitude).
              Alternatively, specify the name of an existing grid file and the
              -R settings (and grid spacing, if applicable) are copied from
              the grid.  For Cartesian data just give xmin/xmax/ymin/ymax.
              This option bases the statistics on those COE that fall inside
              the specified domain.

       -S     Name of a single track.  If given we restrict output to those
              crossovers involving this track [Default output is crossovers
              involving any track pair].

       -V     Selects verbose mode, which will send progress reports to stderr
              [Default runs "silently"].

EXAMPLES
       To report statistics of all the external magnetic crossovers associated
       with the tag MGD77 from the file COE_data.txt, restricted to occupy a
       certain region in the south Pacific, try

       x2sys_report COE_data.txt -V -T MGD77 -R 180/240/-60/-30 -C mag >
       mag_report.txt

       To report on the faa crossovers globally that involves track 12345678,
       try

       x2sys_report COE_data.txt -V -T MGD77 -C faa -S 12345678  >
       faa_report.txt

REFERENCES
       Mittal, P. K. (1984), Algorithm for error adjustment of potential field
       data along a survey network, Geophysics, 49(4), 467-469.

SEE ALSO
       x2sys_binlist(1) x2sys_cross(1) x2sys_datalist(1) x2sys_get(1)
       x2sys_init(1) x2sys_list(1) x2sys_put(1) x2sys_solve(1)

GMT 4.5.14                        1 Nov 2015                   X2SYS_REPORT(1)