x2sys_binlist(1) GMT x2sys_binlist(1)
NAME
x2sys_binlist - Create bin index listing from track data files
SYNOPSIS
x2sys_binlist track(s) -TTAG [ -D ] [ -E ] [ -V[level] ]
Note: No space is allowed between the option flag and the associated
arguments.
DESCRIPTION
x2sys_binlist reads one or more track data files and produces a multi-
segment ASCII track bin-index file (tbf) with the track name in the
header and one data record per bin crossed; these records contain lon,
lat, index, flags[, dist], where lon, lat are the coordinates of the
center of the bin, the index is the 1-D number of the bin, and flags is
a bitflag that describes which data fields were available in this bin.
The optional dist requires -D. The input files can be of any format,
which must be described and passed with the
-T option. The bin-index listing is a crude representation of where
the track goes and is used by the data archivist to build an x2sys
track data base for miscellaneous track queries, such as when needing
to determine which tracks should be compared in a crossover analysis.
You must run x2sys_init to initialize the tag before you can run the
indexing.
REQUIRED ARGUMENTS
tracks Can be one or more ASCII, native binary, or COARDS netCDF 1-D
data files. To supply the data files via a text file with a list
of tracks (one per record), specify the name of the track list
after a leading equal-sign (e.g., =tracks.lis). If the names are
missing their file extension we will append the suffix specified
for this TAG. Track files will be searched for first in the cur-
rent directory and second in all directories listed in
$X2SYS_HOME/TAG/TAG_paths.txt (if it exists). [If $X2SYS_HOME is
not set it will default to $GMT_SHAREDIR/x2sys]. (Note: MGD77
files will also be looked for via MGD77_HOME/mgd77_paths.txt and
*.gmt files will be searched for via $GMT_SHAREDIR/mgg/gmt-
file_paths).
-TTAG Specify the x2sys TAG which tracks the attributes of this data
type.
OPTIONAL ARGUMENTS
-D Calculate the length of track-line segments per bin [Default
skips this step]. The length fragments are given as the 5th out-
put column (after the flags). The length units are obtained via
the TAB setting (see x2sys_init).
-E Convert geographic data to a cylindrical equal-area projection
prior to binning. Basically, we apply the projection
-JYlon0/37:04:17.166076/360, where lon0 is the mid-longitude of
the region. Requires -D, geographical data, and a global region
(e.g., -Rg or -Rd). This option is useful for statistics related
to track-line density but should not be used when preparing
bin-index files for the x2sys track data bases.
-V[level] (more a|)
Select verbosity level [c].
-^ or just -
Print a short message about the syntax of the command, then
exits (NOTE: on Windows just use -).
-+ or just +
Print an extensive usage (help) message, including the explana-
tion of any module-specific option (but not the GMT common
options), then exits.
-? or no arguments
Print a complete usage (help) message, including the explanation
of all options, then exits.
EXAMPLES
To create a bin index file from the MGD77 file 01030061.mgd77 using the
settings associated with the tag MGD77, do
gmt x2sys_binlist 01030061.mgd77 -TMGD77 > 01030061.tbf
To create a track bin index file of all MGD77+ files residing in the
current directory using the settings associated with the tag MGD77+ and
calculate track distances, run
gmt x2sys_binlist *.nc -TMGD77+ -D > all.tbf
SEE ALSO
x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1),
x2sys_put(1), x2sys_report(1), x2sys_solve(1)
COPYRIGHT
2017, P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis, and F. Wobbe
5.4.2 Jun 24, 2017 x2sys_binlist(1)
gmt5 5.4.2 - Generated Thu Jun 29 18:02:25 CDT 2017