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<title>X2SYS_GET</title>
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<h1 align=center>X2SYS_GET</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#OPTIONS">OPTIONS</a><br>
<a href="#EXAMPLES">EXAMPLES</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<hr>
<a name="NAME"></a>
<h2>NAME</h2>
<p style="margin-left:11%; margin-top: 1em">x2sys_get
− Get track listing from the x2sys track index
databases</p>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_get
−T</b><i>TAG</i> [ <b>−C</b> ] [
<b>−D</b>] [ <b>−E</b>] [
<b>−F</b><i>flags</i> ] [ <b>−L</b>[<i>list</i>]
[ <b>−N</b><i>flags</i> ] [ <b>−Qe</b>|<b>i</b>
] [
<b>−R</b><i>west</i>/<i>east</i>/<i>south</i>/<i>north</i>[<b>r</b>]
] [ <b>−V</b> ] ]</p>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_get</b>
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.</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−T</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Specify the x2sys
<i>TAG</i> which tracks the attributes of this data
type.</p> </td>
</table>
<a name="OPTIONS"></a>
<h2>OPTIONS</h2>
<p style="margin-left:11%; margin-top: 1em">No space
between the option flag and the associated arguments.</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−C</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">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.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−D</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Only report the
track names [Default adds the availability of data for each
field].</p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−E</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Append the file
extension to all reported tracks [no extension].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−F</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Give a
comma-separated list of column names (as described in the
definition file) that should be present. [Default selects
all data columns].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−L</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">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
<b>−K</b> option in <b><A HREF="x2sys_cross.html">x2sys_cross</A></b>.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−N</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Give a
comma-separated list of column names (as described in the
definition file) that must be absent.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−Q</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Append <b>e</b> for
external COEs only, and <b>i</b> for internal COEs only
[Default is all COEs]. This applies to the crossover setup
only and requires <b>−L</b>.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−R</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top"><i>west, east,
south,</i> and <i>north</i> 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 <b>r</b> if lower
left and upper right map coordinates are given instead of
w/e/s/n. The two shorthands <b>−Rg</b> and
<b>−Rd</b> 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 <b>−R</b> settings (and grid
spacing, if applicable) are copied from the grid. For
Cartesian data just give <i>xmin/xmax/ymin/ymax</i>. This
option limits the tracks to those that fall at least partly
inside the specified domain.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−V</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects verbose
mode, which will send progress reports to stderr [Default
runs "silently"].</p></td>
</table>
<a name="EXAMPLES"></a>
<h2>EXAMPLES</h2>
<p style="margin-left:11%; margin-top: 1em">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</p>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_get
−V −T</b>MGD77 <b>−R</b>180/240/-60/-30
<b>−F</b>faa,depth</p>
<p style="margin-left:11%; margin-top: 1em">To find all the
tracks associated with the tag MGD77 that have depth but not
twt, try</p>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_get
−V −T</b>MGD77 <b>−F</b>depth
<b>−N</b>twt</p>
<p style="margin-left:11%; margin-top: 1em">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</p>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_get
−V −T</b>MGD77 <b>−L</b>new.lis >
xpairs.lis</p>
<a name="SEE ALSO"></a>
<h2>SEE ALSO</h2>
<p style="margin-left:11%; margin-top: 1em"><i><A HREF="x2sys_binlist.html">x2sys_binlist</A></i>(1),
<i><A HREF="x2sys_cross.html">x2sys_cross</A></i>(1), <i><A HREF="x2sys_datalist.html">x2sys_datalist</A></i>(1),
<i><A HREF="x2sys_init.html">x2sys_init</A></i>(1), <i><A HREF="x2sys_list.html">x2sys_list</A></i>(1),
<i><A HREF="x2sys_put.html">x2sys_put</A></i>(1), <i><A HREF="x2sys_report.html">x2sys_report</A></i>(1),
<i><A HREF="x2sys_solve.html">x2sys_solve</A></i>(1)</p>
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