Focal strategy which moves a Cursor across the raster,
allowing a calculation to be done on each cell using the Cursor
to determine what neighboring cells are inside the focus's
neighborhood, what cells have been added since the last move, and
what cells have been removed since the last move.
Focal strategy which moves a Cursor across the raster, allowing a calculation to be done on each cell using the Cursor to determine what neighboring cells are inside the focus's neighborhood, what cells have been added since the last move, and what cells have been removed since the last move.