   <tr>
      <th>layerId</th>
      <td><p>A unique ID for the layer.</p></td>
    </tr>
    <tr>
      <th>group</th>
      <td><p>The name of the group this layer should be added to.
the same parameter under <code>addTiles</code>)</p></td>
    </tr>
    <tr>
      <th>markerType</th>
      <td><p>The type of marker.  either "marker" or "circleMarker"</p></td>
    </tr>
    <tr>
      <th>markerIcons</th>
      <td><p>Icons for Marker.</p></td>
    </tr>
    <tr>
      <th>markerIconProperty</th>
      <t