<para>
This option specifies the maximum allowable time interval between points in the
track.  If two points in the track are further apart than this value, new
points will be inserted between them.
</para>
<para>
This value is always specified in units of seconds. Examples: 31, 1.5.
</para>
<para>
Either this option or the <option>distance</option> must be specified.
</para>
