<para>
This option is used to change the locations of waypoints without losing any
of the other associated information.  When this option is specified, the
latitude and longitude from later duplicates will replace the latitude and
longitude in the original waypoint.
</para>
<para>
As an example, this option may be used to adjust the locations of "puzzle"
geocaches in a Groundspeak pocket query:
</para>
<example xml:id="Correcting_Cache_Locations">
<title>Using the duplicate filter to correct the locations of "puzzle"
geocaches</title>
<para><userinput>gpsbabel -i gpx -f 43622.gpx -i csv -f corrections.csv -x duplicate,shortname,correct -o gpx -F 43622-corrected.gpx</userinput></para>
<para>
After this command is run, the waypoints in the output file will have all
of the descriptive information from <filename>43622.gpx</filename>, but
waypoints that were also found in <filename>corrections.csv</filename>
will have their coordinates replaced with the coordinates from that file.
</para>
</example>
