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<H1><A NAME="SECTION001200000000000000000"></A>
<A NAME="ch:4"></A>
<BR>
4. General features
</H1>
<P>
This section explains features common to all the programs
in <A NAME="tex2html1032"
HREF="http://gmt.soest.hawaii.edu"><B>GMT</B></A> and summarizes the philosophy behind the system. Some
of the features described here may make more sense once you reach
the cook-book section where we present actual examples of their use.
<P>
<BR><HR>
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
<UL>
<LI><A NAME="tex2html2883"
HREF="node31.html">4.1 <B>GMT</B> units</A>
<LI><A NAME="tex2html2884"
HREF="node32.html">4.2 <B>GMT</B> defaults</A>
<UL>
<LI><A NAME="tex2html2885"
HREF="node33.html">4.2.1 Overview and the <U>.gmtdefaults4</U> file</A>
<LI><A NAME="tex2html2886"
HREF="node34.html">4.2.2 Changing <B>GMT</B> defaults</A>
</UL>
<BR>
<LI><A NAME="tex2html2887"
HREF="node35.html">4.3 Command line arguments</A>
<LI><A NAME="tex2html2888"
HREF="node36.html">4.4 Standardized command line options</A>
<UL>
<LI><A NAME="tex2html2889"
HREF="node37.html">4.4.1 Data domain or map region: The <B>-R</B> option</A>
<LI><A NAME="tex2html2890"
HREF="node38.html">4.4.2 Coordinate transformations and map projections: The <B>-J</B> option</A>
<LI><A NAME="tex2html2891"
HREF="node39.html">4.4.3 Map frame and axes annotations: The <B>-B</B> option</A>
<UL>
<LI><A NAME="tex2html2892"
HREF="node40.html">4.4.3.1 Geographic basemaps</A>
<LI><A NAME="tex2html2893"
HREF="node41.html">4.4.3.2 Cartesian linear axes</A>
<LI><A NAME="tex2html2894"
HREF="node42.html">4.4.3.3 Cartesian log<IMG
WIDTH="17" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
SRC="img2.png"
ALT="$_{10}$"> axes</A>
<LI><A NAME="tex2html2895"
HREF="node43.html">4.4.3.4 Cartesian exponential axes</A>
<LI><A NAME="tex2html2896"
HREF="node44.html">4.4.3.5 Cartesian time axes</A>
</UL>
<LI><A NAME="tex2html2897"
HREF="node45.html">4.4.4 Header data records: The <B>-H</B> option</A>
<LI><A NAME="tex2html2898"
HREF="node46.html">4.4.5 Portrait plot orientation: The <B>-P</B> option</A>
<LI><A NAME="tex2html2899"
HREF="node47.html">4.4.6 Plot overlays: The <B>-K</B> <B>-O</B> options</A>
<LI><A NAME="tex2html2900"
HREF="node48.html">4.4.7 Timestamps on plots: The <B>-U</B> option</A>
<LI><A NAME="tex2html2901"
HREF="node49.html">4.4.8 Verbose feedback: The <B>-V</B> option</A>
<LI><A NAME="tex2html2902"
HREF="node50.html">4.4.9 Plot positioning and layout: The <B>-X</B> <B>-Y</B> options</A>
<LI><A NAME="tex2html2903"
HREF="node51.html">4.4.10 Binary table i/o: The <B>-b</B> option</A>
<LI><A NAME="tex2html2904"
HREF="node52.html">4.4.11 Number of Copies: The <B>-c</B> option</A>
<LI><A NAME="tex2html2905"
HREF="node53.html">4.4.12 Data type selection: The <B>-f</B> option</A>
<LI><A NAME="tex2html2906"
HREF="node54.html">4.4.13 Data gap detection: The <B>-g</B> option</A>
<LI><A NAME="tex2html2907"
HREF="node55.html">4.4.14 Multiple segment data: The <B>-m</B> option</A>
<LI><A NAME="tex2html2908"
HREF="node56.html">4.4.15 Lat/Lon or Lon/Lat?: The <B>-:</B> option</A>
</UL>
<BR>
<LI><A NAME="tex2html2909"
HREF="node57.html">4.5 Command line history</A>
<LI><A NAME="tex2html2910"
HREF="node58.html">4.6 Usage messages, syntax- and general error messages</A>
<LI><A NAME="tex2html2911"
HREF="node59.html">4.7 Standard input or file, header records</A>
<LI><A NAME="tex2html2912"
HREF="node60.html">4.8 Verbose operation</A>
<LI><A NAME="tex2html2913"
HREF="node61.html">4.9 Program output</A>
<LI><A NAME="tex2html2914"
HREF="node62.html">4.10 Input data formats</A>
<LI><A NAME="tex2html2915"
HREF="node63.html">4.11 Output data formats</A>
<LI><A NAME="tex2html2916"
HREF="node64.html">4.12 <I>PostScript</I> features</A>
<LI><A NAME="tex2html2917"
HREF="node65.html">4.13 Specifying pen attributes</A>
<LI><A NAME="tex2html2918"
HREF="node66.html">4.14 Specifying area fill attributes</A>
<LI><A NAME="tex2html2919"
HREF="node67.html">4.15 Color palette tables</A>
<UL>
<LI><A NAME="tex2html2920"
HREF="node68.html">4.15.1 Categorical CPT files</A>
<LI><A NAME="tex2html2921"
HREF="node69.html">4.15.2 Regular CPT files</A>
</UL>
<BR>
<LI><A NAME="tex2html2922"
HREF="node70.html">4.16 Character escape sequences</A>
<LI><A NAME="tex2html2923"
HREF="node71.html">4.17 Grid file format specifications</A>
<LI><A NAME="tex2html2924"
HREF="node72.html">4.18 Options for COARDS-compliant netCDF files</A>
<LI><A NAME="tex2html2925"
HREF="node73.html">4.19 The NaN data value</A>
<LI><A NAME="tex2html2926"
HREF="node74.html">4.20 <B>GMT</B> environment parameters</A>
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<B> Previous:</B> <A NAME="tex2html2870"
HREF="node29.html">3.2 GMT quick reference</A>
<B> <A NAME="tex2html2878"
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<B> <A NAME="tex2html2880"
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<ADDRESS>
Paul Wessel
2010-01-14
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