AGTEK is using GPX files to record tracks and simulations on the Android platform. The use of GPX may also be useful on other platforms, desktop computers, etc. The core portion of GPX is fine for most of our uses (currently - August 2012), but there are some additional bits of information we need. These extra pieces of information are coded into the GPX file using the extension mechanism. To be of maximum use, all AGTEK applications should use the same extensions. This document covers the format of the AGTEK GPX files so other applications can be as compatible as possible.

An example GPX file looks like:

<?xml version=“1.0” encoding=“UTF-8” standalone=“no” ?> <gpx xmlns=“http://www.topografix.com/GPX/1/1”>

<metadata>
  <link href="http://www.agtek.com">
    <text>AGTEK Earthworks</text>
  </link>
  <time>2012-05-21T14:29:24.360-0700</time>
</metadata>
<extensions>
   <agtek>
      <provider>Leica</provider>
   </agtek>
</extensions>
<trk>
  <name>5/21/12 2:29 PM</name>
  <trkseg>
    <trkpt lat="37.69882038778071" lon="-121.81280981721213">
      <ele>86.87749096378684</ele>
      <time>2012-05-21T14:29:25.171-0700</time>
      <extensions>
         <agtek>
            <status-fixtype>Fixed</status-fixtype>
            <status-satellite>8-0</status-satellite>
            <compass>64.245964</compass>
         </agtek>
      </extensions>
    </trkpt>
    <trkpt lat="37.69882042900191" lon="-121.81280982182977">
      <ele>86.87943022698164</ele>
      <time>2012-05-21T14:29:25.192-0700</time>
      <extensions>
         <agtek>
            <status-fixtype>Fixed</status-fixtype>
            <status-satellite>8-0</status-satellite>
            <compass>64.245964</compass>
         </agtek>
      </extensions>
    </trkpt>
    <trkpt lat="37.69882044902325" lon="-121.812809827169">
      <ele>86.88186285737902</ele>
      <time>2012-05-21T14:29:25.200-0700</time>
      <extensions>
         <agtek>
            <status-fixtype>Fixed</status-fixtype>
            <status-satellite>8-0</status-satellite>
            <compass>64.245964</compass>
         </agtek>
      </extensions>
    </trkpt>

    ...snip...

    <trkpt lat="37.69885776454766" lon="-121.81314775154998">
      <ele>86.83196703717113</ele>
      <time>2012-05-21T14:46:29.989-0700</time>
      <extensions>
         <agtek>
            <status-fixtype>Fixed</status-fixtype>
            <status-satellite>8-0</status-satellite>
            <compass>48.64595</compass>
         </agtek>
      </extensions>
    </trkpt>
  </trkseg>
</trk>

</gpx>