*/
public Value pointOnSurface(final ANode node) throws QueryException {
final Geometry geom = gmlReader(node);
return geom == null ? null : gmlWriter(geom.getInteriorPoint());
}
/**
*/
public Value pointOnSurface(final ANode node) throws QueryException {
final Geometry geo = checkGeo(node);
return gmlWriter(geo.getInteriorPoint());
}
/**