This tool calculates the number of downslope neighbours of each grid cell in a raster digital elevation model (DEM). The user must input a DEM (dem). The tool examines the eight neighbouring cells for each grid cell in a the DEM and counts the number of neighbours with an elevation less than the centre cell of the 3 x 3 window. The output image can therefore have values raning from 0 to 8. A raster grid cell with eight downslope neighbours is a peak and a cell with zero downslope neighbours is a pit. This tool can be used with the NumUpslopeNeighbours tool to assess the degree of local flow divergence/convergence.

See Also

NumUpslopeNeighbours

Function Signature

def num_downslope_neighbours(self, dem: Raster) -> Raster: ...

Project Links

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