How to create geographic circles ?

In the current beta-2 version of AWX, you can create geographical circles using the Circle and CircleShape classes. In the beta-3 version, you will be able to do:

<map:Map>
  <map:basemaps>
    <layers:PolygonLayer>
      <overlays:Circle centerLat="0" centerLon="0" radius="500000" units="meters"/>
      <overlays:Circle centerLat="45" centerLon="-80" radius="500" units="kilometers"/>
      <overlays:Circle centerLat="60" centerLon="80" radius="500" units="miles"/>
    </layers:PolygonLayer>
  </map:basemaps>
</map:Map>