X2SYS_BINLIST(1) Generic Mapping Tools X2SYS_BINLIST(1)NAMEx2sys_binlist - Create bin-index files from track data files
SYNOPSISx2sys_binlisttrack(s)-TTAG [ -D ] [ -E ] [ -V ]
DESCRIPTIONx2sys_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 miscella‐
neous track queries, such as when needing to determine which tracks
should be compared in a crossover analysis. You must run x2ys_init to
initialize the tag before you can run the indexing.
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 current 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).
-T Specify the x2sys TAG which tracks the attributes of this data
type.
OPTIONS
No space between the option flag and the associated arguments.
-D Calculate the length of trackline segments per bin [Default
skips this step]. The length fragments are given as the 5th
output 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 trackline density but should not be used when prepar‐
ing bin-index files for the x2sys track data bases.
-V Selects verbose mode, which will send progress reports to stderr
[Default runs "silently"].
EXAMPLES
To create a bin index file from the MGD77 file 01030061.mgd77 using the
settings associated with the tag MGD77, do
x2sys_binlist 01030061.mgd77 -T MGD77 > 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
x2sys_binlist *.nc -T MGD77+ -D > all.tbf
SEE ALSOx2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1),
x2sys_put(1), x2sys_report(1), x2sys_solve(1)GMT 4.5.14 1 Nov 2015 X2SYS_BINLIST(1)
