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  {block name=title}GPSBabel development:Geogrid-Viewer ascii overlay file (.ovl) (ggv_ovl){/block}
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  <div xmlns="http://www.w3.org/1999/xhtml" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Geogrid-Viewer ascii overlay file (.ovl) (ggv_ovl)</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="fmt_geo.html">Prev</a> </td><th width="60%" align="center">Chapter 3. The Formats</th><td width="20%" align="right"> <a accesskey="n" href="fmt_ggv_bin.html">Next</a></td></tr></table><hr /></div><div xmlns="http://www.w3.org/1999/xhtml" class="section"><div class="titlepage"><div><div><h2 class="title" ><a id="fmt_ggv_ovl"></a>Geogrid-Viewer ascii overlay file (.ovl) (ggv_ovl)</h2></div></div></div><p class="fmtcapshdr">
    This format can...
    </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p class="fmtcapsitem">
          read and write waypoints
        </p></li><li class="listitem"><p class="fmtcapsitem">
          read and write tracks
        </p></li><li class="listitem"><p class="fmtcapsitem">
          read and write routes
        </p></li></ul></div><p>
   Overlay files used by <span class="productname">Geogrid</span>™-Viewer has to be in ASCII format. 
   Make sure you save the files correctly.
</p><p>
   Lines or polygons within the <span class="productname">Geogrid</span>™-Viewer (type 3 and 4) will be
   converted to tracks, except they are grouped. In this case GPSBabel creates routes.
</p><p>
   During the creation of an overlay file, a circle will be added to each 
   position of a waypoint or a route.
</p><p>
  Sample layout of the ASCII overlay file
  </p><pre class="programlisting">
    [Symbol &lt;number # &gt;]
    Typ=&lt;1=picture,2=Text, 3=line, 4=area, 5=rectangle, 6=circle, 7=triangle&gt;
    Group=&lt;1=no group, number &gt; 1=group number&gt;
    Col=&lt;number of the line color&gt;
    Zoom=&lt;1=no zoom, 2=zoom&gt;
    Size=&lt;size can be between 101 and 118&gt;
    Art=&lt;style&gt;
    Punkte=&lt;number of XKoord&gt;
    XKoord0=&lt;decimal X coordinate (Longitude) of the waypoint&gt;
    YKoord0=&lt;decimal Y coordinate (Latitude) of the waypoint&gt;
    [MapLage]
    MapName=Top. Karte 1:50.000 Nieders.
    DimmFc=100
    ZoomFc=&lt;zoom level of the map&gt;
    CenterLat=&lt;map center in decimal Y coordinates&gt;
    CenterLong=&lt;map center in decimal X coordinates of &gt;
    RefOn=0
  </pre><p>
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