From dfs2 file

For each time step the following files will be generated:

1.       A shape file (and accompanying index, projection and DBF files) describ­ing the cell values by a point feature layer. The points are positioned in the centre of each grid cell.
(naming convention: globalname_nodes_timestepnumber.*)

2.       A shape file (and accompanying index, projection and DBF files) describ­ing the cell values by a polygon feature layer. The polygons represent the extension of each grid cell.
(naming convention: globalname_cells_timestepnumber.*)