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<H1><A NAME="SECTION0012110000000000000000"></A>
<A NAME="sec:output_data"></A><A NAME="18065"></A>
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4.11 Output data formats
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<P>
The numerical output from <A NAME="tex2html1159"
  HREF="http://gmt.soest.hawaii.edu"><B>GMT</B></A> programs can be binary (when <B>-bo</B> is used) or ASCII [Default].
In the latter case the issue of formatting becomes important.  <A NAME="tex2html1160"
  HREF="http://gmt.soest.hawaii.edu"><B>GMT</B></A> provides extensive
machinery for allowing just about any imaginable format to be used on output.  Analogous to
the processing of input data, several templates guide the formatting process.  These are
<B>OUTPUT_DATE_FORMAT</B> and <B>OUTPUT_CLOCK_FORMAT</B> for calendar-time coordinates,
<B>OUTPUT_DEGREE_FORMAT</B> for geographical coordinates, and <B>D_FORMAT</B> for generic
floating point data.  In addition, the user have control over how columns are separated via
the <B>FIELD_SEPARATOR</B> parameter.  Thus, as an example, it is possible to create limited
FORTRAN-style card records by setting <B>D_FORMAT</B> to %7.3lf and <B>FIELD_SEPARATOR</B> to
none [Default is tab].

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<ADDRESS>
Paul Wessel
2010-07-14
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