      </li>
<li class="listitem">
          New algorithm point_on_surface, generating a point lying on the surface
          (interior) of the polygon
        </li>
<li class="listitem">
          New algorithm is_simple, returning true if a geometry is simple according
          to the OGC standard
        </li>
<li class="listitem">
          New algorithm is_valid, returning true if a geometry is valid according
          to the OGC standard
        </li>
<li class="listitem">
          New algorithm cr