<para>
  This value specifies the grid to be used on write.
</para>
<table xml:id="garmin_grid">
<title>Grid values for garmin_txt</title>
<tgroup cols="4">
<thead>
<row>
 <entry># idx</entry>
 <entry>short</entry>
 <entry>file-header</entry>
 <entry>sample</entry>
</row>
</thead>
<tbody>
<row>
  <entry>0</entry>
  <entry>ddd</entry>
  <entry>Lat/Lon hddd.ddddd</entry>
  <entry>    S26.25333 E27.92333</entry>
</row>
<row>
  <entry>1</entry>
  <entry>dmm</entry>
  <entry>Lat/Lon hddd°mm.mm</entry>
  <entry>N33 56.539 W118 24.471</entry>
</row>
<row>
  <entry>2</entry>
  <entry>dms</entry>
  <entry>Lat/Lon hddd°mm'ss.s</entry>
  <entry>S25 25 26.8 E28 06 07.3</entry>
</row>
<row>
  <entry>3</entry>
  <entry>bng</entry>
  <entry>British National Grid</entry>
  <entry>TQ 18919 69392</entry>
</row>
<row>
  <entry>4</entry>
  <entry>utm</entry>
  <entry>Universal Transverse Mercator</entry>
  <entry>33 U 318293 5637154</entry>
</row>
<row>
  <entry>5</entry>
  <entry>swiss</entry>
  <entry>Swiss grid</entry>
  <entry>776519 167359</entry>
</row>
</tbody>
</tgroup>
</table>



<para>
  Idx or short are valid params for this option.
</para>
