    <tr>
            <td style="font-weight: bold;">coordinate_type </td>
            <td>Coordinate type. </td>
          </tr>
          <tr>
            <td style="font-weight: bold;">cell_type </td>
            <td>Voronoi cell. </td>
          </tr>
          <tr>
            <td style="font-weight: bold;">vertex_type </td>
            <td>Voronoi vertex. </td>
          </tr>
          <tr>
            <td style="font-weight: bold;">edge_type </td>
            <td>Voronoi edge. </td>
          </tr>
 