function handles=get_river(h,handles);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Get the river position
%
%  Further Information:  
%  http://www.brest.ird.fr/Roms_tools/
%  
%  This file is part of ROMSTOOLS
%
%  ROMSTOOLS is free software; you can redistribute it and/or modify
%  it under the terms of the GNU General Public License as published
%  by the Free Software Foundation; either version 2 of the License,
%  or (at your option) any later version.
%
%  ROMSTOOLS is distributed in the hope that it will be useful, but
%  WITHOUT ANY WARRANTY; without even the implied warranty of
%  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%  GNU General Public License for more details.
%
%  You should have received a copy of the GNU General Public License
%  along with this program; if not, write to the Free Software
%  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
%  MA  02111-1307  USA
%
%  Copyright (c) 2004-2006 by Pierrick Penven 
%  e-mail:Pierrick.Penven@ird.fr  
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Get the position of the psi points
%
nc=netcdf(handles.parentgrid,'nowrite');
if isempty(nc)
  disp('Please open a netcdf file !!!')
  return
end
lon=nc{'lon_rho'}(:);
lat=nc{'lat_rho'}(:);
close(nc)
%
% Get the river
%
[x,y] = ginput(1);
[lon1,lat1]=m_xy2ll(x,y);
dist=spheric_dist(lat,lat1,lon,lon1);
[j1,i1]=find(dist==min(min(dist)));
lon1=lon(j1,i1);
lat1=lat(j1,i1);
handles.Isrcparent=i1-1;
handles.Jsrcparent=j1-1;
%
handles=update_plot(h,handles);
%
return
