/**
* Returns a polygon that represents all Points whose distance from this geometric object is less
* than or equal to distance. The returned element must be either gml:Polygon, gml:LineString or
* gml:Point.
*
* @param node xml element containing gml object(s)
* @param distance specific distance from the $geometry (the buffer width)
* @return buffer geometry as gml element
* @throws QueryException query exception
*/
@Deterministic
public ANode buffer(final ANode node, final Dbl distance) throws QueryException {
return gmlWriter(checkGeo(node).buffer(distance.dbl()));
}
