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<title>PSCONTOUR</title>
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<h1 align=center>PSCONTOUR</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="#BUGS">BUGS</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">pscontour
− Contour xyz-data by direct triangulation
[method]</p>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
<p style="margin-left:11%; margin-top: 1em"><b>pscontour</b>
<i>xyzfile</i> <b>−C</b><i>cptfile</i>
<b>−J</b><i>parameters</i>
<b>−R</b><i>west</i>/<i>east</i>/<i>south</i>/<i>north</i>[<b>r</b>]
[ <b>−A</b>[<b>-</b>][<i>labelinfo</i>] ] [
<b>−B</b>[<b>p</b>|<b>s</b>]<i>parameters</i> ] [
<b>−D</b>[<i>dumpfile</i>] ] [
<b>−E</b><i>azim</i>/<i>elev</i>[<b>+w</b><i>lon</i>/<i>lat</i>[/<i>z</i>]][<b>+v</b><i>x0</i>/<i>y0</i>]
] [
<b>−G</b>[<b>d</b>|<b>f</b>|<b>n</b>|<b>l</b>|<b>L</b>|<b>x</b>|<b>X</b>]<i>params</i>
] [ <b>−H</b>[<b>i</b>][<i>nrec</i>] ] [
<b>−I</b> ] [ <b>−K</b> ] [
<b>−L</b><i>pen</i> ] [ <b>−N</b> ] [
<b>−O</b> ] [ <b>−P</b> ] [ <b>−S</b> ] [
<b>−T</b><i>indexfile</i> ] [
<b>−U</b>[<i>just</i>/<i>dx</i>/<i>dy</i>/][<b>c</b>|<i>label</i>]
] [ <b>−V</b> ] [ <b>−W</b>[<b>+</b>]<i>pen</i>
] [
<b>−X</b>[<b>a</b>|<b>c</b>|<b>r</b>][<i>x-shift</i>[<b>u</b>]]
] [
<b>−Y</b>[<b>a</b>|<b>c</b>|<b>r</b>][<i>y-shift</i>[<b>u</b>]]
] [ <b>−c</b><i>copies</i> ] [
<b>−:</b>[<b>i</b>|<b>o</b>] ] [
<b>−b</b>[<b>i</b>|<b>o</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>]]
] [ <b>−m</b>[<i>flag</i>] ]</p>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
<p style="margin-left:11%; margin-top: 1em"><b>pscontour</b>
reads an ASCII [or binary] xyz-file and produces a raw
contour plot by triangulation. By default, the optimal
Delaunay triangulation is performed (using either
Shewchuk’s [1996] or Watson’s [1982] method as
selected during <b><A HREF="GMT.html">GMT</A></b> installation; type <b>pscontour
−</b> to see which method is selected), but the user
may optionally provide a second file with network
information, such as a triangular mesh used for finite
element modeling. In addition to contours, the area between
contours may be painted according to the color palette file.
<i><br>
xyzfile</i></p>
<p style="margin-left:22%;">Raw ASCII (or binary, see
<b>−b</b>) xyz data to be contoured.</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">name of the color
palette file. Must have discrete colors if you want to paint
the surface (<b>−I</b>). Only contours that have
annotation flags set will be annotated.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−J</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects the map
projection. Scale is UNIT/degree, 1:xxxxx, or width in UNIT
(upper case modifier). UNIT is cm, inch, or m, depending on
the <b><A HREF="gmtdefaults.html#MEASURE_UNIT">MEASURE_UNIT</A></b> setting in .gmtdefaults4, but this
can be overridden on the command line by appending <b>c</b>,
<b>i</b>, or <b>m</b> to the scale/width value. When central
meridian is optional, default is center of longitude range
on <b>−R</b> option. Default standard parallel is the
equator. For map height, max dimension, or min dimension,
append <b>h</b>, <b>+</b>, or <b>-</b> to the width,
respectively.</p> </td>
</table>
<p style="margin-left:22%;">More details can be found in
the <b><A HREF="psbasemap.html">psbasemap</A></b> man pages.</p>
<p style="margin-left:22%; margin-top: 1em"><b>CYLINDRICAL
PROJECTIONS:</b></p>
<p style="margin-left:22%; margin-top: 1em"><b>−Jc</b><i>lon0/lat0/scale</i>
(Cassini) <b><br>
−Jcyl_stere</b>/[<i>lon0/</i>[<i>lat0/</i>]]<i>scale</i>
(Cylindrical Stereographic) <b><br>
−Jj</b>[<i>lon0/</i>]<i>scale</i> (Miller) <b><br>
−Jm</b>[<i>lon0</i>/[<i>lat0/</i>]]<i>scale</i>
(Mercator) <b><br>
−Jm</b><i>lon0/lat0/scale</i> (Mercator - Give
meridian and standard parallel) <b><br>
−Jo</b>[<b>a</b>]<i>lon0/lat0/azimuth/scale</i>
(Oblique Mercator - point and azimuth) <b><br>
−Jo</b>[<b>b</b>]<i>lon0/lat0/lon1/lat1/scale</i>
(Oblique Mercator - two points) <b><br>
−Joc</b><i>lon0/lat0/lonp/latp/scale</i> (Oblique
Mercator - point and pole) <b><br>
−Jq</b>[<i>lon0/</i>[<i>lat0/</i>]]<i>scale</i>
(Cylindrical Equidistant) <b><br>
−Jt</b><i>lon0/</i>[<i>lat0/</i>]<i>scale</i> (TM -
Transverse Mercator) <b><br>
−Ju</b><i>zone/scale</i> (UTM - Universal Transverse
Mercator) <b><br>
−Jy</b>[<i>lon0/</i>[<i>lat0/</i>]]<i>scale</i>
(Cylindrical Equal-Area)</p>
<p style="margin-left:22%; margin-top: 1em"><b>CONIC
PROJECTIONS:</b></p>
<p style="margin-left:22%; margin-top: 1em"><b>−Jb</b><i>lon0/lat0/lat1/lat2/scale</i>
(Albers) <b><br>
−Jd</b><i>lon0/lat0/lat1/lat2/scale</i> (Conic
Equidistant) <b><br>
−Jl</b><i>lon0/lat0/lat1/lat2/scale</i> (Lambert Conic
Conformal) <b><br>
−Jpoly</b>/[<i>lon0/</i>[<i>lat0/</i>]]<i>scale</i>
((American) Polyconic)</p>
<p style="margin-left:22%; margin-top: 1em"><b>AZIMUTHAL
PROJECTIONS:</b></p>
<p style="margin-left:22%; margin-top: 1em"><b>−Ja</b><i>lon0/lat0</i>[<i>/horizon</i>]<i>/scale</i>
(Lambert Azimuthal Equal-Area) <b><br>
−Je</b><i>lon0/lat0</i>[<i>/horizon</i>]<i>/scale</i>
(Azimuthal Equidistant) <b><br>
−Jf</b><i>lon0/lat0</i>[<i>/horizon</i>]<i>/scale</i>
(Gnomonic) <b><br>
−Jg</b><i>lon0/lat0</i>[<i>/horizon</i>]<i>/scale</i>
(Orthographic) <b><br>
−Jg</b><i>lon0/lat0/altitude/azimuth/tilt/twist/Width/Height/scale</i>
(General Perspective). <b><br>
−Js</b><i>lon0/lat0</i>[<i>/horizon</i>]<i>/scale</i>
(General Stereographic)</p>
<p style="margin-left:22%; margin-top: 1em"><b>MISCELLANEOUS
PROJECTIONS:</b></p>
<p style="margin-left:22%; margin-top: 1em"><b>−Jh</b>[<i>lon0/</i>]<i>scale</i>
(Hammer) <b><br>
−Ji</b>[<i>lon0/</i>]<i>scale</i> (Sinusoidal) <b><br>
−Jkf</b>[<i>lon0/</i>]<i>scale</i> (Eckert IV) <b><br>
−Jk</b>[<b>s</b>][<i>lon0/</i>]<i>scale</i> (Eckert
IV) <b><br>
−Jn</b>[<i>lon0/</i>]<i>scale</i> (Robinson) <b><br>
−Jr</b>[<i>lon0/</i>]<i>scale</i> (Winkel Tripel)
<b><br>
−Jv</b>[<i>lon0/</i>]<i>scale</i> (Van der Grinten)
<b><br>
−Jw</b>[<i>lon0/</i>]<i>scale</i> (Mollweide)</p>
<p style="margin-left:22%; margin-top: 1em"><b>NON-GEOGRAPHICAL
PROJECTIONS:</b></p>
<p style="margin-left:22%; margin-top: 1em"><b>−Jp</b>[<b>a</b>]<i>scale</i>[<i>/origin</i>][<b>r</b>|<b>z</b>]
(Polar coordinates (theta,r)) <b><br>
−Jx</b><i>x-scale</i>[<b>d</b>|<b>l</b>|<b>p</b><i>pow</i>|<b>t</b>|<b>T</b>][<i>/y-scale</i>[<b>d</b>|<b>l</b>|<b>p</b><i>pow</i>|<b>t</b>|<b>T</b>]]
(Linear, log, and power scaling)</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>−R</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top"><i>xmin</i>,
<i>xmax</i>, <i>ymin</i>, and <i>ymax</i> specify the Region
of interest. For geographic regions, these limits correspond
to <i>west, east, south,</i> and <i>north</i> 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
calendar time coordinates you may either give (a) relative
time (relative to the selected <b><A HREF="gmtdefaults.html#TIME_EPOCH">TIME_EPOCH</A></b> and in the
selected <b><A HREF="gmtdefaults.html#TIME_UNIT">TIME_UNIT</A></b>; append <b>t</b> to
<b>−JX</b>|<b>x</b>), or (b) absolute time of the form
[<i>date</i>]<b>T</b>[<i>clock</i>] (append <b>T</b> to
<b>−JX</b>|<b>x</b>). At least one of <i>date</i> and
<i>clock</i> must be present; the <b>T</b> is always
required. The <i>date</i> string must be of the form
[-]yyyy[-mm[-dd]] (Gregorian calendar) or yyyy[-Www[-d]]
(ISO week calendar), while the <i>clock</i> string must be
of the form hh:mm:ss[.xxx]. The use of delimiters and their
type and positions must be exactly as indicated (however,
input, output and plot formats are customizable; see
<b><A HREF="gmtdefaults.html">gmtdefaults</A></b>).</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>−A</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Give - to disable
all annotations. The optional <i>labelinfo</i> controls the
specifics of the label formatting and consists of a
concatenated string made up of any of the following control
arguments:</p> </td>
</table>
<p style="margin-left:22%;"><b>+a</b><i>angle</i></p>
<p style="margin-left:32%;">For annotations at a fixed
angle, <b>+an</b> for line-normal, or <b>+ap</b> for
line-parallel [Default].</p>
<p style="margin-left:22%;"><b>+c</b><i>dx</i>[/<i>dy</i>]</p>
<p style="margin-left:32%;">Sets the clearance between
label and optional text box. Append <b>c|i|m|p</b> to
specify the unit or % to indicate a percentage of the label
font size [15%].</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+d</b></p></td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Turns on debug
which will draw helper points and lines to illustrate the
workings of the quoted line setup.</p></td>
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+f</b><i>font</i></p> </td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Sets the desired
font [Default <b><A HREF="gmtdefaults.html#ANNOT_FONT_PRIMARY">ANNOT_FONT_PRIMARY</A></b>].</p></td>
</table>
<p style="margin-left:22%;"><b>+g</b>[<i>color</i>]</p>
<p style="margin-left:32%;">Selects opaque text boxes
[Default is transparent]; optionally specify the color
[Default is <b><A HREF="gmtdefaults.html#PAGE_COLOR">PAGE_COLOR</A></b>]. (See SPECIFYING COLOR
below).</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+j</b><i>just</i></p> </td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Sets label
justification [Default is MC]. Ignored when -SqN|n+|-1 is
used.</p> </td>
</table>
<p style="margin-left:22%;"><b>+k</b><i>color</i></p>
<p style="margin-left:32%;">Sets color of text labels
[Default is <b><A HREF="gmtdefaults.html#COLOR_BACKGROUND">COLOR_BACKGROUND</A></b>]. (See SPECIFYING COLOR
below).</p>
<p style="margin-left:22%;"><b>+l</b><i>label</i></p>
<p style="margin-left:32%;">Sets the constant label
text.</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+L</b><i>flag</i></p> </td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Sets the label text
according to the specified flag:</p></td>
</table>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="32%"></td>
<td width="5%">
<p style="margin-top: 1em" valign="top"><b>+Lh</b></p></td>
<td width="6%"></td>
<td width="57%">
<p style="margin-top: 1em" valign="top">Take the label from
the current multisegment header (first scan for an embedded
<b>−L</b><i>label</i> option, if not use the first
word following the segment flag). For multiple-word labels,
enclose entire label in double quotes.</p></td>
<tr valign="top" align="left">
<td width="32%"></td>
<td width="5%">
<p style="margin-top: 1em" valign="top"><b>+Ld</b></p></td>
<td width="6%"></td>
<td width="57%">
<p style="margin-top: 1em" valign="top">Take the Cartesian
plot distances along the line as the label; append
<b>c|i|m|p</b> as the unit [Default is
<b><A HREF="gmtdefaults.html#MEASURE_UNIT">MEASURE_UNIT</A></b>].</p> </td>
<tr valign="top" align="left">
<td width="32%"></td>
<td width="5%">
<p style="margin-top: 1em" valign="top"><b>+LD</b></p></td>
<td width="6%"></td>
<td width="57%">
<p style="margin-top: 1em" valign="top">Calculate actual
map distances; append <b>d|e|k|m|n</b> as the unit [Default
is <b>d</b>(egrees), unless label placement was based on map
distances along the lines in which case we use the same unit
specified for that algorithm]. Requires a map projection to
be used.</p></td>
<tr valign="top" align="left">
<td width="32%"></td>
<td width="5%">
<p style="margin-top: 1em" valign="top"><b>+Lf</b></p></td>
<td width="6%"></td>
<td width="57%">
<p style="margin-top: 1em" valign="top">Use text after the
2nd column in the fixed label location file as the label.
Requires the fixed label location setting.</p></td>
<tr valign="top" align="left">
<td width="32%"></td>
<td width="5%">
<p style="margin-top: 1em" valign="top"><b>+Lx</b></p></td>
<td width="6%"></td>
<td width="57%">
<p style="margin-top: 1em" valign="top">As <b>+Lh</b> but
use the headers in the <i>xfile.d</i> instead. Requires the
crossing file option.</p></td>
</table>
<p style="margin-left:22%;"><b>+n</b><i>dx</i>[/<i>dy</i>]</p>
<p style="margin-left:32%;">Nudges the placement of labels
by the specified amount (append <b>c|i|m|p</b> to specify
the units). Increments are considered in the coordinate
system defined by the orientation of the line; use <b>+N</b>
to force increments in the plot x/y coordinates system [no
nudging].</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="22%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>+o</b></p></td>
<td width="7%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Selects rounded
rectangular text box [Default is rectangular]. Not
applicable for curved text (<b>+v</b>) and only makes sense
for opaque text boxes.</p></td>
</table>
<p style="margin-left:22%;"><b>+p</b>[<i>pen</i>]</p>
<p style="margin-left:32%;">Draws the outline of text
boxsets [Default is no outline]; optionally specify pen for
outline [Default is width = 0.25p, color = black, texture =
solid]. (See SPECIFYING PENS below).</p>
<p style="margin-left:22%;"><b>+r</b><i>min_rad</i></p>
<p style="margin-left:32%;">Will not place labels where the
line’s radius of curvature is less than <i>min_rad</i>
[Default is 0].</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+s</b><i>size</i></p> </td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Sets the desired
font size in points [Default is 9].</p></td>
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+u</b><i>unit</i></p> </td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Appends <i>unit</i>
to all line labels. If <i>unit</i> starts with a leading
hyphen (-) then there will be no space between label value
and the unit. [Default is no unit].</p></td>
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+v</b></p></td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Specifies curved
labels following the path [Default is straight labels].</p></td>
<tr valign="top" align="left">
<td width="22%"></td>
<td width="9%">
<p style="margin-top: 1em" valign="top"><b>+w</b></p></td>
<td width="1%"></td>
<td width="68%">
<p style="margin-top: 1em" valign="top">Specifies how many
(<i>x, y</i>) points will be used to estimate label angles
[Default is 10].</p></td>
</table>
<p style="margin-left:22%;"><b>+=</b><i>prefix</i></p>
<p style="margin-left:32%;">Prepends <i>prefix</i> to all
line labels. If <i>prefix</i> starts with a leading hyphen
(-) then there will be no space between label value and the
prefix. [Default is no prefix].</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>−B</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Sets map boundary
annotation and tickmark intervals; see the <b><A HREF="psbasemap.html">psbasemap</A></b>
man page for all the details.</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">Dump the (x,y,z)
coordinates of each contour to separate files, one for each
contour segment. The files will be named
<i>dumpfile_cont_segment[_i]</i>.xyz, where <i>cont</i> is
the contour value and <i>segment</i> is a running segment
number for each contour interval (for closed contours we
append _i.) However, when <b>−m</b> is used in
conjunction with <b>−D</b> a single multisegment file
is created instead.</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">Sets the
viewpoint’s azimuth and elevation (for perspective
view) [180/90]. For frames used for animation, you may want
to append <b>+</b> to fix the center of your data domain (or
specify a particular world coordinate point with
<b>+w</b><i>lon0</i>/<i>lat</i>[/<i>z</i>]) which will
project to the center of your page size (or specify the
coordinates of the projected veiw point with
<b>+v</b><i>x0</i>/<i>y0).</i></p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−G</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Controls the
placement of labels along the contours. Choose among five
controlling algorithms:</p></td>
</table>
<p style="margin-left:22%;"><b>−Gd</b><i>dist</i>[<b>c</b>|<b>i</b>|<b>m</b>|<b>p</b>]
or
<b>−GD</b><i>dist</i>[<b>d</b>|<b>e</b>|<b>k</b>|<b>m</b>|<b>n</b>]</p>
<p style="margin-left:32%;">For lower case <b>d</b>, give
distances between labels on the plot in your preferred
measurement unit <b>c</b> (cm), <b>i</b> (inch), <b>m</b>
(meter), or <b>p</b> (points), while for upper case
<b>D</b>, specify distances in map units and append the
unit; choose among <b>e</b> (m), <b>k</b> (km), <b>m</b>
(mile), <b>n</b> (nautical mile), or <b>d</b> (spherical
degree). [Default is 10<b>c</b> or 4<b>i</b>].</p>
<p style="margin-left:22%;"><b>−Gf</b><i>ffile.d</i></p>
<p style="margin-left:32%;">Reads the ascii file
<i>ffile.d</i> and places labels at locations in the file
that matches locations along the contours. Inexact matches
and points outside the region are skipped.</p>
<p style="margin-left:22%;"><b>−Gl|L</b><i>line1</i>[,<i>line2</i>,...]</p>
<p style="margin-left:32%;">Give <i>start</i> and
<i>stop</i> coordinates for one or more comma-separated
straight line segments. Labels will be placed where these
lines intersect the contours. The format of each <i>line</i>
specification is <i>start/stop</i>, where <i>start</i> and
<i>stop</i> are either a specified point <i>lon/lat</i> or a
2-character <b>XY</b> key that uses the justification format
employed in <b><A HREF="pstext.html">pstext</A></b> to indicate a point on the map,
given as [LCR][BMT]. <b>−GL</b> will interpret the
point pairs as defining great circles [Default is straight
line].</p>
<p style="margin-left:22%;"><b>−Gn</b><i>n_label</i></p>
<p style="margin-left:32%;">Specifies the number of
equidistant labels for contours line [1]. Upper case
<b>−GN</b> starts labeling exactly at the start of the
line [Default centers them along the line].
<b>−GN</b>-1 places one justified label at start,
while <b>−GN</b>+1 places one justified label at the
end of contours. Optionally, append
/<i>min_dist</i>[c|i|m|p] to enforce that a minimum distance
separation between successive labels is enforced.</p>
<p style="margin-left:22%;"><b>−Gx|X</b><i>xfile.d</i></p>
<p style="margin-left:32%;">Reads the multi-segment file
<i>xfile.d</i> and places labels at the intersections
between the contours and the lines in<i>xfile.d</i>.
<b>−GX</b> will resample the lines first along
great-circle arcs.</p>
<p style="margin-left:22%; margin-top: 1em">In addition,
you may optionally append
<b>+r</b><i>radius</i>[<b>c</b>|<b>i</b>|<b>m</b>|<b>p</b>]
to set a minimum label separation in the x-y plane [no
limitation].</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="7%">
<p style="margin-top: 1em" valign="top"><b>−H</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Input file(s) has
header record(s). If used, the default number of header
records is <b><A HREF="gmtdefaults.html#N_HEADER_RECS">N_HEADER_RECS</A></b>. Use <b>−Hi</b> if
only input data should have header records [Default will
write out header records if the input data have them]. Blank
lines and lines starting with # are always skipped.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−I</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Color the triangles
using the color palette table.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−Jz</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Sets the vertical
scaling (for 3-D maps). Same syntax as <b>−Jx</b>.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−K</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">More
<i>PostScript</i> code will be appended later [Default
terminates the plot system].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−L</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Draw the underlying
triangular mesh using the specified pen attributes [Default
is no mesh]. (See SPECIFYING PENS below).</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−N</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Do NOT clip
contours or image at the boundaries [Default will clip to
fit inside region <b>−R</b>].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−O</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects Overlay
plot mode [Default initializes a new plot system].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−P</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects Portrait
plotting mode [Default is Landscape, see <b><A HREF="gmtdefaults.html">gmtdefaults</A></b>
to change this].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−S</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Skip all input
<i>xyz</i> points that fall outside the region [Default uses
all the data in the triangulation].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−T</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Give name of file
with network information. Each record must contain triplets
of node numbers for a triangle [Default computes these using
Delaunay triangulation (see <b><A HREF="triangulate.html">triangulate</A></b>)].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−U</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Draw Unix System
time stamp on plot. By adding <i>just/dx/dy/</i>, the user
may specify the justification of the stamp and where the
stamp should fall on the page relative to lower left corner
of the plot. For example, BL/0/0 will align the lower left
corner of the time stamp with the lower left corner of the
plot. Optionally, append a <i>label</i>, or <b>c</b> (which
will plot the command string.). The <b><A HREF="GMT.html">GMT</A></b> parameters
<b><A HREF="gmtdefaults.html#UNIX_TIME">UNIX_TIME</A></b>, <b><A HREF="gmtdefaults.html#UNIX_TIME_POS">UNIX_TIME_POS</A></b>, and
<b><A HREF="gmtdefaults.html#UNIX_TIME_FORMAT">UNIX_TIME_FORMAT</A></b> can affect the appearance; see the
<b><A HREF="gmtdefaults.html">gmtdefaults</A></b> man page for details. The time string
will be in the locale set by the environment variable
<b>TZ</b> (generally local time).</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−V</b></p> </td>
<td width="4%"></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="7%">
<p style="margin-top: 1em" valign="top"><b>−W</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Select contouring
and set contour pen attributes. If the <b>+</b> flag is set
then the contour lines are colored according to the cpt file
(see <b>−C</b>). (See SPECIFYING PENS below).</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−X
−Y</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Shift plot origin
relative to the current origin by (<i>x-shift,y-shift</i>)
and optionally append the length unit (<b>c</b>, <b>i</b>,
<b>m</b>, <b>p</b>). You can prepend <b>a</b> to shift the
origin back to the original position after plotting, or
prepend <b>r</b> [Default] to reset the current origin to
the new location. If <b>−O</b> is used then the
default (<i>x-shift,y-shift</i>) is (0,0), otherwise it is
(r1i, r1i) or (r2.5c, r2.5c). Alternatively, give <b>c</b>
to align the center coordinate (x or y) of the plot with the
center of the page based on current page size.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−:</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Toggles between
(longitude,latitude) and (latitude,longitude) input and/or
output. [Default is (longitude,latitude)]. Append <b>i</b>
to select input only or <b>o</b> to select output only.
[Default affects both].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−bi</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects binary
input. Append <b>s</b> for single precision [Default is
<b>d</b> (double)]. Uppercase <b>S</b> or <b>D</b> will
force byte-swapping. Optionally, append <i>ncol</i>, the
number of columns in your binary input file if it exceeds
the columns needed by the program. Or append <b>c</b> if the
input file is netCDF. Optionally, append
<i>var1</i><b>/</b><i>var2</i><b>/</b><i>...</i> to specify
the variables to be read. [Default is 3 input columns]. Use
4-byte integer triplets for node ids (<b>−T</b>).</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−bo</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects binary
output. Append <b>s</b> for single precision [Default is
<b>d</b> (double)]. Uppercase <b>S</b> or <b>D</b> will
force byte-swapping. Optionally, append <i>ncol</i>, the
number of desired columns in your binary output file.
[Default is 3 output columns].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−c</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Specifies the
number of plot copies. [Default is 1].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−m</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">When used in
conjunction with <b>−D</b> a single multisegment file
is created, and each contour section is preceded by a header
record whose first column is <i>flag</i> followed by the
contour level.</p></td>
</table>
<p style="margin-left:11%; margin-top: 1em"><b>SPECIFYING
PENS</b></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 valign="top"><i>pen</i></p></td>
<td width="7%"></td>
<td width="78%">
<p valign="top">The attributes of lines and symbol outlines
as defined by <i>pen</i> is a comma delimetered list of
<i>width</i>, <i>color</i> and <i>texture</i>, each of which
is optional. <i>width</i> can be indicated as a measure
(points, centimeters, inches) or as <b>faint</b>,
<b>thin</b>[<b>ner</b>|<b>nest</b>],
<b>thick</b>[<b>er</b>|<b>est</b>],
<b>fat</b>[<b>ter</b>|<b>test</b>], or <b>obese</b>.
<i>color</i> specifies a gray shade or color (see SPECIFYING
COLOR below). <i>texture</i> is a combination of dashes
‘-’ and dots ‘.’.</p></td>
</table>
<p style="margin-left:11%; margin-top: 1em"><b>SPECIFYING
COLOR</b></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="7%">
<p valign="top"><i>color</i></p></td>
<td width="4%"></td>
<td width="78%">
<p valign="top">The <i>color</i> of lines, areas and
patterns can be specified by a valid color name; by a gray
shade (in the range 0−255); by a decimal color code
(r/g/b, each in range 0−255; h-s-v, ranges
0−360, 0−1, 0−1; or c/m/y/k, each in range
0−1); or by a hexadecimal color code (#rrggbb, as used
in HTML). See the <b><A HREF="gmtcolors.html">gmtcolors</A></b> manpage for more
information and a full list of color names.</p></td>
</table>
<a name="EXAMPLES"></a>
<h2>EXAMPLES</h2>
<p style="margin-left:11%; margin-top: 1em">To make a raw
contour plot from the file topo.xyz and drawing the contours
(pen = 2) given in the color palette file topo.cpt on a
Lambert map at 0.5 inch/degree along the standard parallels
18 and 24, use</p>
<p style="margin-left:11%; margin-top: 1em"><b>pscontour</b>
topo.xyz <b>−R</b>320/330/20/30
<b>−Jl</b>18/24/0.5<b>i −C</b>topo.cpt
<b>−W</b>0.5<b>p</b> > topo.ps</p>
<p style="margin-left:11%; margin-top: 1em">To create a
color <i>PostScript</i> plot of the numerical temperature
solution obtained on a triangular mesh whose node
coordinates and temperatures are stored in temp.xyz and mesh
arrangement is given by the file mesh.ijk, using the colors
in temp.cpt, run</p>
<p style="margin-left:11%; margin-top: 1em"><b>pscontour</b>
temp.xyz <b>−R</b>0/150/0/100 <b>−Jx</b>0.1
<b>−C</b>temp.cpt <b>−G −W</b>0.25<b>p</b>
> temp.ps</p>
<a name="BUGS"></a>
<h2>BUGS</h2>
<p style="margin-left:11%; margin-top: 1em">Sometimes there
will appear to be thin lines of the wrong color in the
image. This is a round-off problem which may be remedied by
using a higher value of <b><A HREF="gmtdefaults.html#DOTS_PR_INCH">DOTS_PR_INCH</A></b> in the
.gmtdefaults4 file.</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="gmtcolors.html">gmtcolors</A></i>(5), <i><A HREF="grdcontour.html">grdcontour</A></i>(1),
<i><A HREF="grdimage.html">grdimage</A></i>(1), <i><A HREF="nearneighbor.html">nearneighbor</A></i>(1),
<i><A HREF="psbasemap.html">psbasemap</A></i>(1), <i><A HREF="psscale.html">psscale</A></i>(1), <i><A HREF="surface.html">surface</A></i>(1),
<i><A HREF="triangulate.html">triangulate</A></i>(1)</p>
<a name="REFERENCES"></a>
<h2>REFERENCES</h2>
<p style="margin-left:11%; margin-top: 1em">Watson, D. F.,
1982, Acord: Automatic contouring of raw data, <i>Comp.
& Geosci., 8</i>, 97−101. <br>
Shewchuk, J. R., 1996, Triangle: Engineering a 2D Quality
Mesh Generator and Delaunay Triangulator, First Workshop on
Applied Computational Geometry (Philadelphia, PA), 124-133,
ACM, May 1996. <br>
www.cs.cmu.edu/~quake/triangle.html</p>
<hr>
</body>
</html>
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