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<h1 align=center>GMTLIST</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>
<a href="#REFERENCES">REFERENCES</a><br>
<hr>
<a name="NAME"></a>
<h2>NAME</h2>
<p style="margin-left:11%; margin-top: 1em">gmtlist −
A data-extractor for <legid>.gmt files</p>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
<p style="margin-left:11%; margin-top: 1em"><b>gmtlist</b>
<i>leg-ids</i> [ <b>−C</b><i>correctionfile</i> ] [
<b>−Da</b><i>startdate</i> ] [
<b>−Db</b><i>stopdate</i> ] [
<b>−F</b><i>flags</i> ] [ <b>−G</b> ] [
<b>−H</b>[<b>i</b>][<i>nrec</i>] ] [
<b>−R</b><i>west</i>/<i>east</i>/<i>south</i>/<i>north</i>[<b>r</b>]
] [ <b>−Sa</b><i>startdist</i> ] [
<b>−Sb</b><i>stopdist</i> ] [ <b>−V</b> ] [
<b>−W</b><i>weight</i> ] [
<b>−bo</b>[<b>s</b>|<b>S</b>|<b>d</b>|<b>D</b>[<i>ncol</i>]|<b>c</b>[<i>var1</i><b>/</b><i>...</i>]]
]</p>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
<p style="margin-left:11%; margin-top: 1em"><b>gmtlist</b>
reads <legid>.gmt files and produces an ASCII [or
binary] table. The <legid>.gmt files contain
time(<b>s</b>), latitude(<b>y</b>), longitude(<b>x</b>),
gravity(<b>g/G</b>), magnetics(<b>m/M</b>), and
bathymetry(<b>t/T</b>), and the user may extract any
combination of these 6 parameters + distance(<b>d</b>),
heading (<b>h</b>), velocity (<b>v</b>), and weight
(<b>w</b>, see <b>−W</b>). A sub-section can be
specified by passing time- or distance-intervals along track
or by selecting a region. <i><br>
leg-ids</i></p>
<p style="margin-left:22%;">Can be one or more cruisenames.
To give a list of names, use ‘cat
list_of_legs‘.</p>
<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="4%">
<p style="margin-top: 1em" valign="top"><b>−C</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Apply crossover
Corrections to the data. If no correction file is given,
gmtlist reads the default correction file. (See
<b>XSYSTEM</b> for how to set up your own correction
file).</p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−Da</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Do not list data
collected before <i>startdate</i> (mm/dd/yyyy/hh:mm)
[Default is first day].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−Db</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Do not list data
collected after <i>stopdate</i> (mm/dd/yyyy/hh:mm). [Default
is last day].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−F</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Can be any
combination of <b>syxgmtdhv</b> to indicate the desired
output data. The data will appear in the order indicated by
flags. If <b>G</b>, <b>M</b>, or <b>T</b> is substituted for
<b>g</b>, <b>m</b>, <b>t</b>, only records that have that
combination of data are written out. If <b>s</b> is followed
by <b>c</b> (calendar), then yyyy/mm/dd/hh/mm/ss is written
out, if <b>s</b> is followed by <b>j</b> (julian), then
yyyy/jd/hh/mm/ss is written out. Default is seconds from
start of year.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−G</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Force Geographical
longitudes (-180/+180) rather than geodetic (0-360)
[Default].</p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−H</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Issue a header
record with names for each data field.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−R</b></p> </td>
<td width="7%"></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.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−Sa</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Do not list data
that are less than <i>startdist</i> km along track from port
of departure. [Default is 0].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−Sb</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Do not list data
that are more than <i>stopdist</i> km along track from port
of departure. [Default is length of track].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−V</b></p> </td>
<td width="7%"></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>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−W</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Set the weight for
these data. Weight output option must be set in
<b>−F</b>. This is useful if the data are to be
processed with the weighted averaging techniques offered by
<b><A HREF="blockmean.html">blockmean</A></b>, <b><A HREF="blockmedian.html">blockmedian</A></b>, and
<b><A HREF="blockmode.html">blockmode</A></b>.</p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−b</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects binary
output mode (in double precision) [Default is ASCII].
<b>−H</b> is ignored if <b>−b</b> is selected.
Julian and calendar dates are not supported for binary time
output (i.e., you get seconds from start of year).</p></td>
</table>
<a name="EXAMPLES"></a>
<h2>EXAMPLES</h2>
<p style="margin-left:11%; margin-top: 1em">To get a
(distance, heading, crossover-corrected gravity, bathymetry)
listing from c2104.gmt, starting at June 3 1971 20:45 and
ending at distance = 5000 km, use the following command:</p>
<p style="margin-left:11%; margin-top: 1em"><b>gmtlist</b>
c2104 <b>−Da</b> 6/3/1971/20:45 <b>−Sb</b> 5000
<b>−F</b> dhgt <b>−C</b> > myfile</p>
<p style="margin-left:11%; margin-top: 1em">To make input
for <b><A HREF="blockmean.html">blockmean</A></b> and <b><A HREF="surface.html">surface</A></b> using all the
cruises listed in the file gmt.list, but only the data that
are inside the specified area, and make output binary:</p>
<p style="margin-left:11%; margin-top: 1em"><b>gmtlist</b>
‘cat gmt.list‘ <b>−F</b> xyg
<b>−R</b>-40/-30/25/35 <b>−b</b> >
allgrav.xyg</p>
<a name="SEE ALSO"></a>
<h2>SEE ALSO</h2>
<p style="margin-left:11%; margin-top: 1em"><i><A HREF="GMT.html">GMT</A></i>(1),
<i><A HREF="x_system.html">x_system</A></i>(1)</p>
<a name="REFERENCES"></a>
<h2>REFERENCES</h2>
<p style="margin-left:11%; margin-top: 1em">Wessel, P., and
W. H. F. Smith, 2013, The Generic Mapping Tools (GMT)
version 4.5.11 Technical Reference & Cookbook,
SOEST/NOAA. <br>
Wessel, P., and W. H. F. Smith, 1998, New, Improved Version
of Generic Mapping Tools Released, EOS Trans., AGU, 79 (47),
p. 579. <br>
Wessel, P., and W. H. F. Smith, 1995, New Version of the
Generic Mapping Tools Released, EOS Trans., AGU, 76 (33), p.
329. <br>
Wessel, P., and W. H. F. Smith, 1995, New Version of the
Generic Mapping Tools Released,
http://www.agu.org/eos_elec/95154e.html, Copyright 1995 by
the American Geophysical Union. <br>
Wessel, P., and W. H. F. Smith, 1991, Free Software Helps
Map and Display Data, EOS Trans., AGU, 72 (41), p. 441.</p>
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