This tool calculates the maximum length of the flowpaths that run through each grid cell (in map horizontal units) in an input digital elevation model (`dem`). The tool works by first calculating the D8 flow pointer (d8_pointer) from the input DEM. The DEM must be depressionless and should have been pre-processed using the breach_depressions_least_cost or fill_depressions tool. The user must also specify the name of output raster (`output`).

## See Also

d8_pointer, breach_depressions_least_cost, fill_depressions, average_upslope_flowpath_length, downslope_flowpath_length, downslope_distance_to_stream

## Function Signature

`def max_upslope_value(self, dem: Raster, values_raster: Raster) -> Raster: ...`

## Project Links

WbW Homepage User Manual Support WbW