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<title>PSSCALE</title>
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<h1 align=center>PSSCALE</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="#NOTES">NOTES</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">psscale −
Plot gray scale or color scale on maps</p>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
<p style="margin-left:11%; margin-top: 1em"><b>psscale
−D</b><i>xpos</i>/<i>ypos</i>/<i>length</i>/<i>width</i>[<b>h</b>]
[ <b>−A</b>[<b>a</b>|<b>l</b>|<b>c</b>] ] [
<b>−B</b>[<b>p</b>|<b>s</b>]<i>parameters</i> ] [
<b>−C</b><i>cpt_file</i> ] [
<b>−E</b>[<b>b</b>|<b>f</b>][<i>length</i>] ] [
<b>−I</b>[<i>max_intens</i>|<i>low_i</i>/<i>high_i</i>]
] [ <b>−K</b> ] [
<b>−L</b>[<b>i</b>][<i>gap</i>] ] [ <b>−M</b> ]
[ <b>−N</b><i>dpi</i> ] [ <b>−O</b> ] [
<b>−P</b> ] [ <b>−Q</b> ] [
<b>−U</b>[<i>just</i>/<i>dx</i>/<i>dy</i>/][<b>c</b>|<i>label</i>]
] [ <b>−V</b> ] [
<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>−Z</b><i>zfile</i> ] [
<b>−c</b><i>copies</i> ]</p>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
<p style="margin-left:11%; margin-top: 1em"><b>psscale</b>
plots gray scales or color scales on maps. Both horizontal
and vertical scales are supported. For cpt_files with
gradational colors (i.e., the lower and upper boundary of an
interval have different r/g/b values) <b>psscale</b> will
interpolate to give a continuous scale. Variations in
intensity due to shading/illumination may be displayed by
setting the option <b>−I</b>. Colors may be spaced
according to a linear scale, all be equal size, or by
providing a file with individual tile widths.</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>−D</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Defines the
position of the center/top (for horizontal scale) or
center/left (for vertical scale) and the dimensions of the
scale. Give a negative length to reverse the scalebar.
Append <i>h</i> to get a horizontal scale [Default is
vertical].</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="7%">
<p style="margin-top: 1em" valign="top"><b>−A</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Place annotations
and labels above (instead of below) horizontal scalebars and
to the left (instead of the right) of vertical scalebars.
Append <b>a</b> or <b>l</b> to move only the annotations or
the label to the other side. Append <b>c</b> if you want to
print a vertical label as a column of characters (does not
work with special characters).</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−B</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Set annotation,
tick, and gridline interval for the colorbar. The x-axis
label will plot beneath a horizontal bar (or vertically to
the right of a vertical bar), except when using
<b>−A</b>. As an option, use the y-axis label to plot
the data unit to the right of a horizontal bar (and above a
vertical bar). If <b>−B</b> is omitted, or no
annotation intervals are provided, the default is to
annotate every color level based on the numerical entries in
the cpt file (which may be overridden by ULB flags in the
cpt file). To specify custom text annotations for intervals,
you must append ;<i>annotation</i> to each z-slice in the
cpt file.</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"><i>cpt_file</i> is
the color palette file to be used. By default all color
changes are annotated. To use a subset, add an extra column
to the cpt-file with a L, U, or B to annotate Lower, Upper,
or Both color segment boundaries (but see <b>−B</b>).
If not given, <b>psscale</b> will read stdin. Like
<b><A HREF="grdview.html">grdview</A></b>, <b>psscale</b> can understand pattern
specifications in the cpt file.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="7%">
<p style="margin-top: 1em" valign="top"><b>−E</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Add sidebar
triangles for <b>b</b>ack- and/or <b>f</b>oreground colors.
Add <b>f</b> or <b>b</b> for only one sidebar triangle
[Default gives both]. Optionally, append triangle height
[Default is half the barwidth].</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">Add illumination
effects. Optionally, set the range of intensities from - to
+ <i>max_intens</i>. If not specified, 1 is used.
Alternatively, append <i>low/high</i> intensities to specify
an asymmetric range [Default is no illumination].</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">Gives equal-sized
color rectangles. Default scales rectangles according to the
z-range in the cpt-file (Also see <b>−Z</b>). If set,
any equal interval annotation set with <b>−B</b> will
be ignored. If <i>gap</i> is appended and the cpt table is
discrete we will center each annotation on each rectangle,
using the lower boundary z-value for the annotation. If
<b>i</b> is prepended we annotate the interval range
instead. If <b>−I</b> is used then each rectangle will
have its constant color modified by the specified
intensity.</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">Force a monochrome
graybar using the (television) YIQ transformation.</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">Effective
dots-per-inch for the rectangular image making up the color
scale [300].</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>−Q</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Select logarithmic
scale and power of ten annotations. All z-values in the cpt
file will be converted to p = log10(z) and only integer p
values will be annotated using the 10^p format [Default is
linear scale].</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">Do not separate
different colour intervals with black lines.</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>−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>−Z</b></p> </td>
<td width="4%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">File with
colorbar-width per color entry. By default, width of entry
is scaled to color range, i.e., z = 0-100 gives twice the
width as z = 100-150 (Also see <b>−L</b>).</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>
</table>
<a name="EXAMPLES"></a>
<h2>EXAMPLES</h2>
<p style="margin-left:11%; margin-top: 1em">To append a
vertical color scale (7.5 cm long; 1.25 cm wide) to the
right of a plot that is 6 inch wide and 4 inch high, using
illumination, and show back- and foreground colors, and
annotating every 5 units, use</p>
<p style="margin-left:11%; margin-top: 1em"><b>psscale
−D</b>6.5<b>i</b>/2<b>i</b>/7.5<b>c</b>/1.25<b>c
−O −C</b>colors.cpt <b>−I −E
−B</b>5:BATHYMETRY:/:m: >> map.ps</p>
<a name="NOTES"></a>
<h2>NOTES</h2>
<p style="margin-left:11%; margin-top: 1em">When the cpt
file is discrete and no illumination is specified, the color
bar will be painted using polygons. For all other cases we
must paint with an image. Some color printers may give
slightly different colors for the two methods given
identical RGB values.</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="makecpt.html">makecpt</A></i>(1), <i><A HREF="grd2cpt.html">grd2cpt</A></i>(1)</p>
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