Ubuntu Manpage: x2sys_get - Get track listing from the x2sys track index databases

NAME

       x2sys_get - Get track listing from the x2sys track index databases

SYNOPSIS

       x2sys_get  -TTAG  [  -C  ] [ -D ] [ -E ] [ -Fflags ] [ -L[list] ] [ -Nflags ] [ -Qe|i ]  [
       -Rwest/east/south/north[r] ] [ -V ] ]

DESCRIPTION

       x2sys_get will return the names of the track data files in the x2sys data  base  for  this
       TAG  that  match  the given requirements.  You may choose a specific region and optionally
       ask only for tracks that meet certain data criteria.  Finally, you may select an option to
       list all possible pairs that might generate crossovers.

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

OPTIONS

No space between the option flag and the associated arguments.

-C Instead of reporting the track names, just output the coordinates of the center of
each bin that has at least one track with the specified data.

-D Only report the track names [Default adds the availability of data for each field].

-E Append the file extension to all reported tracks [no extension].

-F Give a comma-separated list of column names (as described in the definition file)
that should all be present within the selected region. [Default selects all data
columns]. A track will be included in the returned list if at least one bin
reports that the track has all of the listed columns.

-L Crossover mode. Return a list of track pairs that should be checked for possible
crossovers. The list is determined from the bin-index data base on the assumption
that tracks occupying the same bin are very likely to intersect. By default we
return all possible pairs in the data base. Append the name of a file with a list
of tracks if you want to limit the output to those pairs that involve at least one
of the track names in your list. The output is suitable for the -K option in
x2sys_cross.

-N Give a comma-separated list of column names (as described in the definition file)
that all must be absent. A track will be excluded from the returned list if at
least one bin reports that the track some all of the listed columns.

-Q Append e for external COEs only, and i for internal COEs only [Default is all
COEs]. This applies to the crossover setup only and requires -L.

-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
limits the tracks to those that fall at least partly inside the specified domain.

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

EXAMPLES

       To find all the tracks associated with the tag  MGD77,  restricted  to  occupy  a  certain
       region in the south Pacific, and have at least free air anomalies and bathymetry, try

       x2sys_get -V -T MGD77 -R 180/240/-60/-30 -F faa,depth

       To find all the tracks associated with the tag MGD77 that have depth but not twt, try

       x2sys_get -V -T MGD77 -F depth -N twt

       To  find  all the pairs associated with the tag MGD77 that might intersect each other, but
       only those pairs which involves tracks in your list new.lis, try

       x2sys_get -V -T MGD77 -L new.lis > xpairs.lis

NOTE