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<H2><A NAME="SECTION00361000000000000000">
1.6.1 The <B>-B</B> option</A>
</H2>
<A NAME="1661"></A>
<A NAME="272"></A>
<A NAME="273"></A>
<A NAME="274"></A>
<A NAME="275"></A>
<A NAME="276"></A>
<P>
This is by far the most complicated option in <A NAME="tex2html106"
HREF="http://www.soest.hawaii.edu/gmt"><B>GMT</B></A>, but most examples
of its usage are actually quite simple.
Given as <B>-B</B><I>xinfo</I>[/<I>yinfo</I>][:."title string":][<B>W</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>w</B>][<B>E</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>e</B>][<B>S</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>s</B>][<B>N</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>n</B>],
this switch specifies a map boundary to be plotted by using the
selected tick-mark intervals. <I>xinfo</I> and <I>yinfo</I> are of the form
<BR>
<P>
[<B>a</B>]<I>tick</I>[<B>m</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>c</B>][<B>f</B><I>tick</I>[<B>m</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>c</B>]][<B>g</B><I>tick</I>[<B>m</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>c</B>]][<B>l</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>p</B>][:"axis label":][:,"unit label":]
<BR>
<P>
where <B>a</B>, <B>f</B>, and <B>g</B> stand for annotation, frame, and grid interval.
The <B>m</B><IMG
WIDTH="8" HEIGHT="31" ALIGN="MIDDLE" BORDER="0"
SRC="img1.gif"
ALT="$\vert$"><B>c</B> indicates minutes (<B>m</B>) or seconds (<B>c</B>). By
default, all 4 boundaries are plotted (denoted <B>W</B>, <B>E</B>, <B>S</B>,
<B>N</B>). To change this selection, append the codes for those you want
(e.g., <B>WSn</B>). Upper case (e.g., <B>W</B>) will annotate in addition to
draw axis/tick-marks. The title, if given, will appear centered above the plot<A NAME="tex2html103"
HREF="footnode.html#foot317"><SUP>1.1</SUP></A>.
<P>
<P></P>
<DIV ALIGN="CENTER"><A NAME="fig:GMT_-B_geo"></A><A NAME="1662"></A>
<TABLE>
<CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG>
Geographic map border using separate selections for anotation,
frame, and grid intervals. Formatting of the anotation is controlled by
the parameter DEGREE_FORMAT in your <U>.gmtdefaults</U> file.</CAPTION>
<TR><TD><IMG
WIDTH="370" HEIGHT="88" BORDER="0"
SRC="img14.gif"
ALT="\begin{figure}\centering\epsfig{figure=eps/GMT_-B_geo.eps}\end{figure}"></TD></TR>
</TABLE>
</DIV><P></P>
<P></P>
<DIV ALIGN="CENTER"><A NAME="1663"></A>
<TABLE>
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 1.6:</STRONG>
Linear Cartesian projection axis. Long tickmarks accompany
anotations, shorter ticks indicate frame interval. The axis label is
optional. We used <B>-R</B>0/12/0/1 <B>-JX</B>3/0.4
<B>-Ba</B>4<B>f</B>2<B>g</B>1:Frequency::,%:.</CAPTION>
<TR><TD><IMG
WIDTH="375" HEIGHT="93" BORDER="0"
SRC="img15.gif"
ALT="\begin{figure}\centering\epsfig{figure=eps/GMT_-B_linear.eps}\end{figure}"></TD></TR>
</TABLE>
</DIV><P></P>
<P>
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<LI><A NAME="tex2html740"
HREF="node24.html">1.6.1.1 Options for log<IMG
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<LI><A NAME="tex2html741"
HREF="node25.html">1.6.1.2 Options for exponential axes</A>
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<ADDRESS>
Paul Wessel
2001-04-18
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