text: -----------------------------------------------------------------------
  -- $Id$
  --
  -- Copyright (c) 2011 Jorge Arevalo <jorge.arevalo@deimos-space.com>
  --
  -- This is free software; you can redistribute and/or modify it under
  -- the terms of the GNU General Public Licence. See the COPYING file.
  -----------------------------------------------------------------------
  
  -------------------------------------------------------------------
  -- st_isempty
  -----------------------------------------------------------------------
  select st_isempty(rast) from empty_raster_test;