Class for handling basin-related procedures, among which:
finding basins in DEM
assigning risk values to each basin
converting all or each basin into a Raster object for output
Calculates upstream cells (basins) for a given layer of cells
This method calculates the upstream cells and basins
from a given input layer of cells, and a direction layer.
Class for handling visualization-related procedures, among which:
Converting basins polygons to outlines
Separating each basin into separate Raster object for output