This tool can be used to mark the flowpath initiated from user-specified locations downslope and terminating at either the grid's edge or a grid cell with undefined flow direction. The user must input the name of a D8 flow pointer grid (d8_pntr
) and an input vector file indicating the location of one or more initiation points, i.e. 'seed points' (seed_pts
). The seed point file must be a vector of the POINT VectorGeometryType. Note that the flow pointer should be generated from a DEM that has been processed to remove all topographic depression (see breach_depressions_least_cost and fill_depressions) and created using the D8 flow algorithm (d8_pointer).
d8_pointer, breach_depressions_least_cost, fill_depressions, downslope_flowpath_length, downslope_distance_to_stream
def trace_downslope_flowpaths(self, seed_points: Vector, d8_pointer: Raster, esri_pntr: bool = False, zero_background: bool = False) -> Raster: ...