Summary
This tool computes slope in a D8 downslope direction averaged over a user selected distance. Distance should be specified in horizontal map units.
Usage
Command Prompt Syntax:
mpiexec -n <number of processes> SlopeAveDown
-fel <felfile>
-p <pfile>
-slpd <slpdfile>
[-dn]
Parameters:
- felfile: Input pit filled elevation grid
- pfile: Input D8 flow direction grid
- slpdfile: Output D8 slope distance averaged grid
- dn: User selected downslope distance
Syntax
SlopeAverageDown (Input_D8_Flow_Direction_Grid, Input_Pit_Filled_Elevation_Grid, Distance, Input_Number_of_Processes, Output_Slope_Average_Down_Grid)
| Parameter | Explanation | Data Type |
|---|---|---|
| Input_D8_Flow_Direction_Grid |
Dialog Reference This input is a grid of flow directions that are encoded using the D8 method where all flow from a cells goes to a single neighboring cell in the direction of steepest descent. There is no python reference for this parameter. |
Raster Layer |
| Input_Pit_Filled_Elevation_Grid |
Dialog Reference A grid of elevation values. This is usually the output of the "Pit Remove" tool, in which case it is elevations with pits removed. Pits are low elevation areas in digital elevation models (DEMs) that are completely surrounded by higher terrain. They are generally taken to be artifacts that interfere with the processing of flow across DEMs, so are removed by raising their elevation to the point where they just drain. This step is not essential if you have reason to believe that the pits in your DEM are real. There is no python reference for this parameter. |
Raster Layer |
| Distance |
Dialog Reference Input parameter of downslope distance over which to calculate the slope (in horizontal map units). There is no python reference for this parameter. |
Double |
| Input_Number_of_Processes |
Dialog Reference This input indicates the number of stripes that the domain will be divided into and the number of MPI parallel processes that will be spawned to evaluate each piece of the domain. There is no python reference for this parameter. |
Long |
| Output_Slope_Average_Down_Grid |
Dialog Reference A grid of the ratio of specific catchment area (contributing area) to slope. There is no python reference for this parameter. |
Raster Dataset |
Code Samples
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