order="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
            The quotes around the parenthesis are necessary because the filter parser
            should interpret the point coordinates as a single string. Also, round
            brackets are already used to group subexpressions of the filter expression.
            Whenever there